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  • java 常见几种发送http请求案例

      1 import java.io.FileOutputStream;  
  2 import java.io.IOException;  
  3 import java.io.InputStream;  
  4 import java.io.InputStreamReader;  
  5 import java.io.OutputStreamWriter;  
  6 import java.io.UnsupportedEncodingException;  
  7 import java.net.HttpURLConnection;  
  8 import java.net.Socket;  
  9 import java.net.URL;  
 10 import java.net.URLConnection;  
 11 import java.net.URLEncoder;  
 12 import java.util.ArrayList;  
 13 import java.util.HashMap;  
 14 import java.util.Iterator;  
 15 import java.util.List;  
 16 import java.util.Map;  
 17 import java.util.Map.Entry;  
 18   
 19 import org.apache.http.HttpResponse;  
 20 import org.apache.http.NameValuePair;  
 21 import org.apache.http.client.HttpClient;  
 22 import org.apache.http.client.entity.UrlEncodedFormEntity;  
 23 import org.apache.http.client.methods.HttpGet;  
 24 import org.apache.http.client.methods.HttpPost;  
 25 import org.apache.http.impl.client.DefaultHttpClient;  
 26 import org.apache.http.message.BasicNameValuePair;  
 27   
 28 /** 
 29  * @Description:发送http请求帮助类 
 30  * @author:liuyc 
 31  * @time:2016年5月17日 下午3:25:32 
 32  */  
 33 public class HttpClientHelper {  
 34     /** 
 35      * @Description:使用HttpURLConnection发送post请求 
 36      * @author:liuyc 
 37      * @time:2016年5月17日 下午3:26:07 
 38      */  
 39     public static String sendPost(String urlParam, Map<String, Object> params, String charset) {  
 40         StringBuffer resultBuffer = null;  
 41         // 构建请求参数  
 42         StringBuffer sbParams = new StringBuffer();  
 43         if (params != null && params.size() > 0) {  
 44             for (Entry<String, Object> e : params.entrySet()) {  
 45                 sbParams.append(e.getKey());  
 46                 sbParams.append("=");  
 47                 sbParams.append(e.getValue());  
 48                 sbParams.append("&");  
 49             }  
 50         }  
 51         HttpURLConnection con = null;  
 52         OutputStreamWriter osw = null;  
 53         BufferedReader br = null;  
 54         // 发送请求  
 55         try {  
 56             URL url = new URL(urlParam);  
 57             con = (HttpURLConnection) url.openConnection();  
 58             con.setRequestMethod("POST");  
 59             con.setDoOutput(true);  
 60             con.setDoInput(true);  
 61             con.setUseCaches(false);  
 62             con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");  
 63             if (sbParams != null && sbParams.length() > 0) {  
 64                 osw = new OutputStreamWriter(con.getOutputStream(), charset);  
 65                 osw.write(sbParams.substring(0, sbParams.length() - 1));  
 66                 osw.flush();  
 67             }  
 68             // 读取返回内容  
 69             resultBuffer = new StringBuffer();  
 70             int contentLength = Integer.parseInt(con.getHeaderField("Content-Length"));  
 71             if (contentLength > 0) {  
 72                 br = new BufferedReader(new InputStreamReader(con.getInputStream(), charset));  
 73                 String temp;  
 74                 while ((temp = br.readLine()) != null) {  
 75                     resultBuffer.append(temp);  
 76                 }  
 77             }  
 78         } catch (Exception e) {  
 79             throw new RuntimeException(e);  
 80         } finally {  
 81             if (osw != null) {  
 82                 try {  
 83                     osw.close();  
 84                 } catch (IOException e) {  
 85                     osw = null;  
 86                     throw new RuntimeException(e);  
 87                 } finally {  
 88                     if (con != null) {  
 89                         con.disconnect();  
 90                         con = null;  
 91                     }  
 92                 }  
 93             }  
 94             if (br != null) {  
 95                 try {  
 96                     br.close();  
 97                 } catch (IOException e) {  
 98                     br = null;  
 99                     throw new RuntimeException(e);  
100                 } finally {  
101                     if (con != null) {  
102                         con.disconnect();  
103                         con = null;  
104                     }  
105                 }  
106             }  
107         }  
108   
109         return resultBuffer.toString();  
110     }  
111   
112     /** 
113      * @Description:使用URLConnection发送post 
114      * @author:liuyc 
115      * @time:2016年5月17日 下午3:26:52 
116      */  
117     public static String sendPost2(String urlParam, Map<String, Object> params, String charset) {  
118         StringBuffer resultBuffer = null;  
119         // 构建请求参数  
120         StringBuffer sbParams = new StringBuffer();  
121         if (params != null && params.size() > 0) {  
122             for (Entry<String, Object> e : params.entrySet()) {  
123                 sbParams.append(e.getKey());  
124                 sbParams.append("=");  
125                 sbParams.append(e.getValue());  
126                 sbParams.append("&");  
127             }  
128         }  
129         URLConnection con = null;  
130         OutputStreamWriter osw = null;  
131         BufferedReader br = null;  
132         try {  
133             URL realUrl = new URL(urlParam);  
134             // 打开和URL之间的连接  
135             con = realUrl.openConnection();  
136             // 设置通用的请求属性  
137             con.setRequestProperty("accept", "*/*");  
138             con.setRequestProperty("connection", "Keep-Alive");  
139             con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");  
140             con.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");  
141             // 发送POST请求必须设置如下两行  
142             con.setDoOutput(true);  
143             con.setDoInput(true);  
144             // 获取URLConnection对象对应的输出流  
145             osw = new OutputStreamWriter(con.getOutputStream(), charset);  
146             if (sbParams != null && sbParams.length() > 0) {  
147                 // 发送请求参数  
148                 osw.write(sbParams.substring(0, sbParams.length() - 1));  
149                 // flush输出流的缓冲  
150                 osw.flush();  
151             }  
152             // 定义BufferedReader输入流来读取URL的响应  
153             resultBuffer = new StringBuffer();  
154             int contentLength = Integer.parseInt(con.getHeaderField("Content-Length"));  
155             if (contentLength > 0) {  
156                 br = new BufferedReader(new InputStreamReader(con.getInputStream(), charset));  
157                 String temp;  
158                 while ((temp = br.readLine()) != null) {  
159                     resultBuffer.append(temp);  
160                 }  
161             }  
162         } catch (Exception e) {  
163             throw new RuntimeException(e);  
164         } finally {  
165             if (osw != null) {  
166                 try {  
167                     osw.close();  
168                 } catch (IOException e) {  
169                     osw = null;  
170                     throw new RuntimeException(e);  
171                 }  
172             }  
173             if (br != null) {  
174                 try {  
175                     br.close();  
176                 } catch (IOException e) {  
177                     br = null;  
178                     throw new RuntimeException(e);  
179                 }  
180             }  
181         }  
182         return resultBuffer.toString();  
183     }  
184   
185     /**  
186      * @Description:发送get请求保存下载文件  
187      * @author:liuyc  
188      * @time:2016年5月17日 下午3:27:29  
189      */  
190     public static void sendGetAndSaveFile(String urlParam, Map<String, Object> params, String fileSavePath) {  
191         // 构建请求参数  
192         StringBuffer sbParams = new StringBuffer();  
193         if (params != null && params.size() > 0) {  
194             for (Entry<String, Object> entry : params.entrySet()) {  
195                 sbParams.append(entry.getKey());  
196                 sbParams.append("=");  
197                 sbParams.append(entry.getValue());  
198                 sbParams.append("&");  
199             }  
200         }  
201         HttpURLConnection con = null;  
202         BufferedReader br = null;  
203         FileOutputStream os = null;  
204         try {  
205             URL url = null;  
206             if (sbParams != null && sbParams.length() > 0) {  
207                 url = new URL(urlParam + "?" + sbParams.substring(0, sbParams.length() - 1));  
208             } else {  
209                 url = new URL(urlParam);  
210             }  
211             con = (HttpURLConnection) url.openConnection();  
212             con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");  
213             con.connect();  
214             InputStream is = con.getInputStream();  
215             os = new FileOutputStream(fileSavePath);  
216             byte buf[] = new byte[1024];  
217             int count = 0;  
218             while ((count = is.read(buf)) != -1) {  
219                 os.write(buf, 0, count);  
220             }  
221             os.flush();  
222         } catch (Exception e) {  
223             throw new RuntimeException(e);  
224         } finally {  
225             if (os != null) {  
226                 try {  
227                     os.close();  
228                 } catch (IOException e) {  
229                     os = null;  
230                     throw new RuntimeException(e);  
231                 } finally {  
232                     if (con != null) {  
233                         con.disconnect();  
234                         con = null;  
235                     }  
236                 }  
237             }  
238             if (br != null) {  
239                 try {  
240                     br.close();  
241                 } catch (IOException e) {  
242                     br = null;  
243                     throw new RuntimeException(e);  
244                 } finally {  
245                     if (con != null) {  
246                         con.disconnect();  
247                         con = null;  
248                     }  
249                 }  
250             }  
251         }  
252     }  
253   
254     /** 
255      * @Description:使用HttpURLConnection发送get请求 
256      * @author:liuyc 
257      * @time:2016年5月17日 下午3:27:29 
258      */  
259     public static String sendGet(String urlParam, Map<String, Object> params, String charset) {  
260         StringBuffer resultBuffer = null;  
261         // 构建请求参数  
262         StringBuffer sbParams = new StringBuffer();  
263         if (params != null && params.size() > 0) {  
264             for (Entry<String, Object> entry : params.entrySet()) {  
265                 sbParams.append(entry.getKey());  
266                 sbParams.append("=");  
267                 sbParams.append(entry.getValue());  
268                 sbParams.append("&");  
269             }  
270         }  
271         HttpURLConnection con = null;  
272         BufferedReader br = null;  
273         try {  
274             URL url = null;  
275             if (sbParams != null && sbParams.length() > 0) {  
276                 url = new URL(urlParam + "?" + sbParams.substring(0, sbParams.length() - 1));  
277             } else {  
278                 url = new URL(urlParam);  
279             }  
280             con = (HttpURLConnection) url.openConnection();  
281             con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");  
282             con.connect();  
283             resultBuffer = new StringBuffer();  
284             br = new BufferedReader(new InputStreamReader(con.getInputStream(), charset));  
285             String temp;  
286             while ((temp = br.readLine()) != null) {  
287                 resultBuffer.append(temp);  
288             }  
289         } catch (Exception e) {  
290             throw new RuntimeException(e);  
291         } finally {  
292             if (br != null) {  
293                 try {  
294                     br.close();  
295                 } catch (IOException e) {  
296                     br = null;  
297                     throw new RuntimeException(e);  
298                 } finally {  
299                     if (con != null) {  
300                         con.disconnect();  
301                         con = null;  
302                     }  
303                 }  
304             }  
305         }  
306         return resultBuffer.toString();  
307     }  
308   
309     /** 
310      * @Description:使用URLConnection发送get请求 
311      * @author:liuyc 
312      * @time:2016年5月17日 下午3:27:58 
313      */  
314     public static String sendGet2(String urlParam, Map<String, Object> params, String charset) {  
315         StringBuffer resultBuffer = null;  
316         // 构建请求参数  
317         StringBuffer sbParams = new StringBuffer();  
318         if (params != null && params.size() > 0) {  
319             for (Entry<String, Object> entry : params.entrySet()) {  
320                 sbParams.append(entry.getKey());  
321                 sbParams.append("=");  
322                 sbParams.append(entry.getValue());  
323                 sbParams.append("&");  
324             }  
325         }  
326         BufferedReader br = null;  
327         try {  
328             URL url = null;  
329             if (sbParams != null && sbParams.length() > 0) {  
330                 url = new URL(urlParam + "?" + sbParams.substring(0, sbParams.length() - 1));  
331             } else {  
332                 url = new URL(urlParam);  
333             }  
334             URLConnection con = url.openConnection();  
335             // 设置请求属性  
336             con.setRequestProperty("accept", "*/*");  
337             con.setRequestProperty("connection", "Keep-Alive");  
338             con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");  
339             con.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");  
340             // 建立连接  
341             con.connect();  
342             resultBuffer = new StringBuffer();  
343             br = new BufferedReader(new InputStreamReader(con.getInputStream(), charset));  
344             String temp;  
345             while ((temp = br.readLine()) != null) {  
346                 resultBuffer.append(temp);  
347             }  
348         } catch (Exception e) {  
349             throw new RuntimeException(e);  
350         } finally {  
351             if (br != null) {  
352                 try {  
353                     br.close();  
354                 } catch (IOException e) {  
355                     br = null;  
356                     throw new RuntimeException(e);  
357                 }  
358             }  
359         }  
360         return resultBuffer.toString();  
361     }  
362   
363     /**  
364      * @Description:使用HttpClient发送post请求  
365      * @author:liuyc  
366      * @time:2016年5月17日 下午3:28:23  
367      */  
368     public static String httpClientPost(String urlParam, Map<String, Object> params, String charset) {  
369         StringBuffer resultBuffer = null;  
370         HttpClient client = new DefaultHttpClient();  
371         HttpPost httpPost = new HttpPost(urlParam);  
372         // 构建请求参数  
373         List<NameValuePair> list = new ArrayList<NameValuePair>();  
374         Iterator<Entry<String, Object>> iterator = params.entrySet().iterator();  
375         while (iterator.hasNext()) {  
376             Entry<String, Object> elem = iterator.next();  
377             list.add(new BasicNameValuePair(elem.getKey(), String.valueOf(elem.getValue())));  
378         }  
379         BufferedReader br = null;  
380         try {  
381             if (list.size() > 0) {  
382                 UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list, charset);  
383                 httpPost.setEntity(entity);  
384             }  
385             HttpResponse response = client.execute(httpPost);  
386             // 读取服务器响应数据  
387             resultBuffer = new StringBuffer();  
388             br = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));  
389             String temp;  
390             while ((temp = br.readLine()) != null) {  
391                 resultBuffer.append(temp);  
392             }  
393         } catch (Exception e) {  
394             throw new RuntimeException(e);  
395         } finally {  
396             if (br != null) {  
397                 try {  
398                     br.close();  
399                 } catch (IOException e) {  
400                     br = null;  
401                     throw new RuntimeException(e);  
402                 }  
403             }  
404         }  
405         return resultBuffer.toString();  
406     }  
407   
408     /** 
409      * @Description:使用HttpClient发送get请求 
410      * @author:liuyc 
411      * @time:2016年5月17日 下午3:28:56 
412      */  
413     public static String httpClientGet(String urlParam, Map<String, Object> params, String charset) {  
414         StringBuffer resultBuffer = null;  
415         HttpClient client = new DefaultHttpClient();  
416         BufferedReader br = null;  
417         // 构建请求参数  
418         StringBuffer sbParams = new StringBuffer();  
419         if (params != null && params.size() > 0) {  
420             for (Entry<String, Object> entry : params.entrySet()) {  
421                 sbParams.append(entry.getKey());  
422                 sbParams.append("=");  
423                 try {  
424                     sbParams.append(URLEncoder.encode(String.valueOf(entry.getValue()), charset));  
425                 } catch (UnsupportedEncodingException e) {  
426                     throw new RuntimeException(e);  
427                 }  
428                 sbParams.append("&");  
429             }  
430         }  
431         if (sbParams != null && sbParams.length() > 0) {  
432             urlParam = urlParam + "?" + sbParams.substring(0, sbParams.length() - 1);  
433         }  
434         HttpGet httpGet = new HttpGet(urlParam);  
435         try {  
436             HttpResponse response = client.execute(httpGet);  
437             // 读取服务器响应数据  
438             br = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));  
439             String temp;  
440             resultBuffer = new StringBuffer();  
441             while ((temp = br.readLine()) != null) {  
442                 resultBuffer.append(temp);  
443             }  
444         } catch (Exception e) {  
445             throw new RuntimeException(e);  
446         } finally {  
447             if (br != null) {  
448                 try {  
449                     br.close();  
450                 } catch (IOException e) {  
451                     br = null;  
452                     throw new RuntimeException(e);  
453                 }  
454             }  
455         }  
456         return resultBuffer.toString();  
457     }  
458   
459     /** 
460      * @Description:使用socket发送post请求 
461      * @author:liuyc 
462      * @time:2016年5月18日 上午9:26:22 
463      */  
464     public static String sendSocketPost(String urlParam, Map<String, Object> params, String charset) {  
465         String result = "";  
466         // 构建请求参数  
467         StringBuffer sbParams = new StringBuffer();  
468         if (params != null && params.size() > 0) {  
469             for (Entry<String, Object> entry : params.entrySet()) {  
470                 sbParams.append(entry.getKey());  
471                 sbParams.append("=");  
472                 sbParams.append(entry.getValue());  
473                 sbParams.append("&");  
474             }  
475         }  
476         Socket socket = null;  
477         OutputStreamWriter osw = null;  
478         InputStream is = null;  
479         try {  
480             URL url = new URL(urlParam);  
481             String host = url.getHost();  
482             int port = url.getPort();  
483             if (-1 == port) {  
484                 port = 80;  
485             }  
486             String path = url.getPath();  
487             socket = new Socket(host, port);  
488             StringBuffer sb = new StringBuffer();  
489             sb.append("POST " + path + " HTTP/1.1
");  
490             sb.append("Host: " + host + "
");  
491             sb.append("Connection: Keep-Alive
");  
492             sb.append("Content-Type: application/x-www-form-urlencoded; charset=utf-8 
");  
493             sb.append("Content-Length: ").append(sb.toString().getBytes().length).append("
");  
494             // 这里一个回车换行，表示消息头写完，不然服务器会继续等待  
495             sb.append("
");  
496             if (sbParams != null && sbParams.length() > 0) {  
497                 sb.append(sbParams.substring(0, sbParams.length() - 1));  
498             }  
499             osw = new OutputStreamWriter(socket.getOutputStream());  
500             osw.write(sb.toString());  
501             osw.flush();  
502             is = socket.getInputStream();  
503             String line = null;  
504             // 服务器响应体数据长度  
505             int contentLength = 0;  
506             // 读取http响应头部信息  
507             do {  
508                 line = readLine(is, 0, charset);  
509                 if (line.startsWith("Content-Length")) {  
510                     // 拿到响应体内容长度  
511                     contentLength = Integer.parseInt(line.split(":")[1].trim());  
512                 }  
513                 // 如果遇到了一个单独的回车换行，则表示请求头结束  
514             } while (!line.equals("
"));  
515             // 读取出响应体数据（就是你要的数据）  
516             result = readLine(is, contentLength, charset);  
517         } catch (Exception e) {  
518             throw new RuntimeException(e);  
519         } finally {  
520             if (osw != null) {  
521                 try {  
522                     osw.close();  
523                 } catch (IOException e) {  
524                     osw = null;  
525                     throw new RuntimeException(e);  
526                 } finally {  
527                     if (socket != null) {  
528                         try {  
529                             socket.close();  
530                         } catch (IOException e) {  
531                             socket = null;  
532                             throw new RuntimeException(e);  
533                         }  
534                     }  
535                 }  
536             }  
537             if (is != null) {  
538                 try {  
539                     is.close();  
540                 } catch (IOException e) {  
541                     is = null;  
542                     throw new RuntimeException(e);  
543                 } finally {  
544                     if (socket != null) {  
545                         try {  
546                             socket.close();  
547                         } catch (IOException e) {  
548                             socket = null;  
549                             throw new RuntimeException(e);  
550                         }  
551                     }  
552                 }  
553             }  
554         }  
555         return result;  
556     }  
557   
558     /** 
559      * @Description:使用socket发送get请求 
560      * @author:liuyc 
561      * @time:2016年5月18日 上午9:27:18 
562      */  
563     public static String sendSocketGet(String urlParam, Map<String, Object> params, String charset) {  
564         String result = "";  
565         // 构建请求参数  
566         StringBuffer sbParams = new StringBuffer();  
567         if (params != null && params.size() > 0) {  
568             for (Entry<String, Object> entry : params.entrySet()) {  
569                 sbParams.append(entry.getKey());  
570                 sbParams.append("=");  
571                 sbParams.append(entry.getValue());  
572                 sbParams.append("&");  
573             }  
574         }  
575         Socket socket = null;  
576         OutputStreamWriter osw = null;  
577         InputStream is = null;  
578         try {  
579             URL url = new URL(urlParam);  
580             String host = url.getHost();  
581             int port = url.getPort();  
582             if (-1 == port) {  
583                 port = 80;  
584             }  
585             String path = url.getPath();  
586             socket = new Socket(host, port);  
587             StringBuffer sb = new StringBuffer();  
588             sb.append("GET " + path + " HTTP/1.1
");  
589             sb.append("Host: " + host + "
");  
590             sb.append("Connection: Keep-Alive
");  
591             sb.append("Content-Type: application/x-www-form-urlencoded; charset=utf-8 
");  
592             sb.append("Content-Length: ").append(sb.toString().getBytes().length).append("
");  
593             // 这里一个回车换行，表示消息头写完，不然服务器会继续等待  
594             sb.append("
");  
595             if (sbParams != null && sbParams.length() > 0) {  
596                 sb.append(sbParams.substring(0, sbParams.length() - 1));  
597             }  
598             osw = new OutputStreamWriter(socket.getOutputStream());  
599             osw.write(sb.toString());  
600             osw.flush();  
601             is = socket.getInputStream();  
602             String line = null;  
603             // 服务器响应体数据长度  
604             int contentLength = 0;  
605             // 读取http响应头部信息  
606             do {  
607                 line = readLine(is, 0, charset);  
608                 if (line.startsWith("Content-Length")) {  
609                     // 拿到响应体内容长度  
610                     contentLength = Integer.parseInt(line.split(":")[1].trim());  
611                 }  
612                 // 如果遇到了一个单独的回车换行，则表示请求头结束  
613             } while (!line.equals("
"));  
614             // 读取出响应体数据（就是你要的数据）  
615             result = readLine(is, contentLength, charset);  
616         } catch (Exception e) {  
617             throw new RuntimeException(e);  
618         } finally {  
619             if (osw != null) {  
620                 try {  
621                     osw.close();  
622                 } catch (IOException e) {  
623                     osw = null;  
624                     throw new RuntimeException(e);  
625                 } finally {  
626                     if (socket != null) {  
627                         try {  
628                             socket.close();  
629                         } catch (IOException e) {  
630                             socket = null;  
631                             throw new RuntimeException(e);  
632                         }  
633                     }  
634                 }  
635             }  
636             if (is != null) {  
637                 try {  
638                     is.close();  
639                 } catch (IOException e) {  
640                     is = null;  
641                     throw new RuntimeException(e);  
642                 } finally {  
643                     if (socket != null) {  
644                         try {  
645                             socket.close();  
646                         } catch (IOException e) {  
647                             socket = null;  
648                             throw new RuntimeException(e);  
649                         }  
650                     }  
651                 }  
652             }  
653         }  
654         return result;  
655     }  
656   
657     /** 
658      * @Description:读取一行数据，contentLe内容长度为0时，读取响应头信息，不为0时读正文 
659      * @time:2016年5月17日 下午6:11:07 
660      */  
661     private static String readLine(InputStream is, int contentLength, String charset) throws IOException {  
662         List<Byte> lineByte = new ArrayList<Byte>();  
663         byte tempByte;  
664         int cumsum = 0;  
665         if (contentLength != 0) {  
666             do {  
667                 tempByte = (byte) is.read();  
668                 lineByte.add(Byte.valueOf(tempByte));  
669                 cumsum++;  
670             } while (cumsum < contentLength);// cumsum等于contentLength表示已读完  
671         } else {  
672             do {  
673                 tempByte = (byte) is.read();  
674                 lineByte.add(Byte.valueOf(tempByte));  
675             } while (tempByte != 10);// 换行符的ascii码值为10  
676         }  
677   
678         byte[] resutlBytes = new byte[lineByte.size()];  
679         for (int i = 0; i < lineByte.size(); i++) {  
680             resutlBytes[i] = (lineByte.get(i)).byteValue();  
681         }  
682         return new String(resutlBytes, charset);  
683     }  
684       
685 }
    1. import java.io.FileOutputStream;  
    2. import java.io.IOException;  
    3. import java.io.InputStream;  
    4. import java.io.InputStreamReader;  
    5. import java.io.OutputStreamWriter;  
    6. import java.io.UnsupportedEncodingException;  
    7. import java.net.HttpURLConnection;  
    8. import java.net.Socket;  
    9. import java.net.URL;  
    10. import java.net.URLConnection;  
    11. import java.net.URLEncoder;  
    12. import java.util.ArrayList;  
    13. import java.util.HashMap;  
    14. import java.util.Iterator;  
    15. import java.util.List;  
    16. import java.util.Map;  
    17. import java.util.Map.Entry;  
    18.   
    19. import org.apache.http.HttpResponse;  
    20. import org.apache.http.NameValuePair;  
    21. import org.apache.http.client.HttpClient;  
    22. import org.apache.http.client.entity.UrlEncodedFormEntity;  
    23. import org.apache.http.client.methods.HttpGet;  
    24. import org.apache.http.client.methods.HttpPost;  
    25. import org.apache.http.impl.client.DefaultHttpClient;  
    26. import org.apache.http.message.BasicNameValuePair;  
    27.   
    28. /** 
    29.  * @Description:发送http请求帮助类 
    30.  * @author:liuyc 
    31.  * @time:2016年5月17日 下午3:25:32 
    32.  */  
    33. public class HttpClientHelper {  
    34.     /** 
    35.      * @Description:使用HttpURLConnection发送post请求 
    36.      * @author:liuyc 
    37.      * @time:2016年5月17日 下午3:26:07 
    38.      */  
    39.     public static String sendPost(String urlParam, Map<String, Object> params, String charset) {  
    40.         StringBuffer resultBuffer = null;  
    41.         // 构建请求参数  
    42.         StringBuffer sbParams = new StringBuffer();  
    43.         if (params != null && params.size() > 0) {  
    44.             for (Entry<String, Object> e : params.entrySet()) {  
    45.                 sbParams.append(e.getKey());  
    46.                 sbParams.append("=");  
    47.                 sbParams.append(e.getValue());  
    48.                 sbParams.append("&");  
    49.             }  
    50.         }  
    51.         HttpURLConnection con = null;  
    52.         OutputStreamWriter osw = null;  
    53.         BufferedReader br = null;  
    54.         // 发送请求  
    55.         try {  
    56.             URL url = new URL(urlParam);  
    57.             con = (HttpURLConnection) url.openConnection();  
    58.             con.setRequestMethod("POST");  
    59.             con.setDoOutput(true);  
    60.             con.setDoInput(true);  
    61.             con.setUseCaches(false);  
    62.             con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");  
    63.             if (sbParams != null && sbParams.length() > 0) {  
    64.                 osw = new OutputStreamWriter(con.getOutputStream(), charset);  
    65.                 osw.write(sbParams.substring(0, sbParams.length() - 1));  
    66.                 osw.flush();  
    67.             }  
    68.             // 读取返回内容  
    69.             resultBuffer = new StringBuffer();  
    70.             int contentLength = Integer.parseInt(con.getHeaderField("Content-Length"));  
    71.             if (contentLength > 0) {  
    72.                 br = new BufferedReader(new InputStreamReader(con.getInputStream(), charset));  
    73.                 String temp;  
    74.                 while ((temp = br.readLine()) != null) {  
    75.                     resultBuffer.append(temp);  
    76.                 }  
    77.             }  
    78.         } catch (Exception e) {  
    79.             throw new RuntimeException(e);  
    80.         } finally {  
    81.             if (osw != null) {  
    82.                 try {  
    83.                     osw.close();  
    84.                 } catch (IOException e) {  
    85.                     osw = null;  
    86.                     throw new RuntimeException(e);  
    87.                 } finally {  
    88.                     if (con != null) {  
    89.                         con.disconnect();  
    90.                         con = null;  
    91.                     }  
    92.                 }  
    93.             }  
    94.             if (br != null) {  
    95.                 try {  
    96.                     br.close();  
    97.                 } catch (IOException e) {  
    98.                     br = null;  
    99.                     throw new RuntimeException(e);  
    100.                 } finally {  
    101.                     if (con != null) {  
    102.                         con.disconnect();  
    103.                         con = null;  
    104.                     }  
    105.                 }  
    106.             }  
    107.         }  
    108.   
    109.         return resultBuffer.toString();  
    110.     }  
    111.   
    112.     /** 
    113.      * @Description:使用URLConnection发送post 
    114.      * @author:liuyc 
    115.      * @time:2016年5月17日 下午3:26:52 
    116.      */  
    117.     public static String sendPost2(String urlParam, Map<String, Object> params, String charset) {  
    118.         StringBuffer resultBuffer = null;  
    119.         // 构建请求参数  
    120.         StringBuffer sbParams = new StringBuffer();  
    121.         if (params != null && params.size() > 0) {  
    122.             for (Entry<String, Object> e : params.entrySet()) {  
    123.                 sbParams.append(e.getKey());  
    124.                 sbParams.append("=");  
    125.                 sbParams.append(e.getValue());  
    126.                 sbParams.append("&");  
    127.             }  
    128.         }  
    129.         URLConnection con = null;  
    130.         OutputStreamWriter osw = null;  
    131.         BufferedReader br = null;  
    132.         try {  
    133.             URL realUrl = new URL(urlParam);  
    134.             // 打开和URL之间的连接  
    135.             con = realUrl.openConnection();  
    136.             // 设置通用的请求属性  
    137.             con.setRequestProperty("accept", "*/*");  
    138.             con.setRequestProperty("connection", "Keep-Alive");  
    139.             con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");  
    140.             con.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");  
    141.             // 发送POST请求必须设置如下两行  
    142.             con.setDoOutput(true);  
    143.             con.setDoInput(true);  
    144.             // 获取URLConnection对象对应的输出流  
    145.             osw = new OutputStreamWriter(con.getOutputStream(), charset);  
    146.             if (sbParams != null && sbParams.length() > 0) {  
    147.                 // 发送请求参数  
    148.                 osw.write(sbParams.substring(0, sbParams.length() - 1));  
    149.                 // flush输出流的缓冲  
    150.                 osw.flush();  
    151.             }  
    152.             // 定义BufferedReader输入流来读取URL的响应  
    153.             resultBuffer = new StringBuffer();  
    154.             int contentLength = Integer.parseInt(con.getHeaderField("Content-Length"));  
    155.             if (contentLength > 0) {  
    156.                 br = new BufferedReader(new InputStreamReader(con.getInputStream(), charset));  
    157.                 String temp;  
    158.                 while ((temp = br.readLine()) != null) {  
    159.                     resultBuffer.append(temp);  
    160.                 }  
    161.             }  
    162.         } catch (Exception e) {  
    163.             throw new RuntimeException(e);  
    164.         } finally {  
    165.             if (osw != null) {  
    166.                 try {  
    167.                     osw.close();  
    168.                 } catch (IOException e) {  
    169.                     osw = null;  
    170.                     throw new RuntimeException(e);  
    171.                 }  
    172.             }  
    173.             if (br != null) {  
    174.                 try {  
    175.                     br.close();  
    176.                 } catch (IOException e) {  
    177.                     br = null;  
    178.                     throw new RuntimeException(e);  
    179.                 }  
    180.             }  
    181.         }  
    182.         return resultBuffer.toString();  
    183.     }  
    184.   
    185.     /**  
    186.      * @Description:发送get请求保存下载文件  
    187.      * @author:liuyc  
    188.      * @time:2016年5月17日 下午3:27:29  
    189.      */  
    190.     public static void sendGetAndSaveFile(String urlParam, Map<String, Object> params, String fileSavePath) {  
    191.         // 构建请求参数  
    192.         StringBuffer sbParams = new StringBuffer();  
    193.         if (params != null && params.size() > 0) {  
    194.             for (Entry<String, Object> entry : params.entrySet()) {  
    195.                 sbParams.append(entry.getKey());  
    196.                 sbParams.append("=");  
    197.                 sbParams.append(entry.getValue());  
    198.                 sbParams.append("&");  
    199.             }  
    200.         }  
    201.         HttpURLConnection con = null;  
    202.         BufferedReader br = null;  
    203.         FileOutputStream os = null;  
    204.         try {  
    205.             URL url = null;  
    206.             if (sbParams != null && sbParams.length() > 0) {  
    207.                 url = new URL(urlParam + "?" + sbParams.substring(0, sbParams.length() - 1));  
    208.             } else {  
    209.                 url = new URL(urlParam);  
    210.             }  
    211.             con = (HttpURLConnection) url.openConnection();  
    212.             con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");  
    213.             con.connect();  
    214.             InputStream is = con.getInputStream();  
    215.             os = new FileOutputStream(fileSavePath);  
    216.             byte buf[] = new byte[1024];  
    217.             int count = 0;  
    218.             while ((count = is.read(buf)) != -1) {  
    219.                 os.write(buf, 0, count);  
    220.             }  
    221.             os.flush();  
    222.         } catch (Exception e) {  
    223.             throw new RuntimeException(e);  
    224.         } finally {  
    225.             if (os != null) {  
    226.                 try {  
    227.                     os.close();  
    228.                 } catch (IOException e) {  
    229.                     os = null;  
    230.                     throw new RuntimeException(e);  
    231.                 } finally {  
    232.                     if (con != null) {  
    233.                         con.disconnect();  
    234.                         con = null;  
    235.                     }  
    236.                 }  
    237.             }  
    238.             if (br != null) {  
    239.                 try {  
    240.                     br.close();  
    241.                 } catch (IOException e) {  
    242.                     br = null;  
    243.                     throw new RuntimeException(e);  
    244.                 } finally {  
    245.                     if (con != null) {  
    246.                         con.disconnect();  
    247.                         con = null;  
    248.                     }  
    249.                 }  
    250.             }  
    251.         }  
    252.     }  
    253.   
    254.     /** 
    255.      * @Description:使用HttpURLConnection发送get请求 
    256.      * @author:liuyc 
    257.      * @time:2016年5月17日 下午3:27:29 
    258.      */  
    259.     public static String sendGet(String urlParam, Map<String, Object> params, String charset) {  
    260.         StringBuffer resultBuffer = null;  
    261.         // 构建请求参数  
    262.         StringBuffer sbParams = new StringBuffer();  
    263.         if (params != null && params.size() > 0) {  
    264.             for (Entry<String, Object> entry : params.entrySet()) {  
    265.                 sbParams.append(entry.getKey());  
    266.                 sbParams.append("=");  
    267.                 sbParams.append(entry.getValue());  
    268.                 sbParams.append("&");  
    269.             }  
    270.         }  
    271.         HttpURLConnection con = null;  
    272.         BufferedReader br = null;  
    273.         try {  
    274.             URL url = null;  
    275.             if (sbParams != null && sbParams.length() > 0) {  
    276.                 url = new URL(urlParam + "?" + sbParams.substring(0, sbParams.length() - 1));  
    277.             } else {  
    278.                 url = new URL(urlParam);  
    279.             }  
    280.             con = (HttpURLConnection) url.openConnection();  
    281.             con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");  
    282.             con.connect();  
    283.             resultBuffer = new StringBuffer();  
    284.             br = new BufferedReader(new InputStreamReader(con.getInputStream(), charset));  
    285.             String temp;  
    286.             while ((temp = br.readLine()) != null) {  
    287.                 resultBuffer.append(temp);  
    288.             }  
    289.         } catch (Exception e) {  
    290.             throw new RuntimeException(e);  
    291.         } finally {  
    292.             if (br != null) {  
    293.                 try {  
    294.                     br.close();  
    295.                 } catch (IOException e) {  
    296.                     br = null;  
    297.                     throw new RuntimeException(e);  
    298.                 } finally {  
    299.                     if (con != null) {  
    300.                         con.disconnect();  
    301.                         con = null;  
    302.                     }  
    303.                 }  
    304.             }  
    305.         }  
    306.         return resultBuffer.toString();  
    307.     }  
    308.   
    309.     /** 
    310.      * @Description:使用URLConnection发送get请求 
    311.      * @author:liuyc 
    312.      * @time:2016年5月17日 下午3:27:58 
    313.      */  
    314.     public static String sendGet2(String urlParam, Map<String, Object> params, String charset) {  
    315.         StringBuffer resultBuffer = null;  
    316.         // 构建请求参数  
    317.         StringBuffer sbParams = new StringBuffer();  
    318.         if (params != null && params.size() > 0) {  
    319.             for (Entry<String, Object> entry : params.entrySet()) {  
    320.                 sbParams.append(entry.getKey());  
    321.                 sbParams.append("=");  
    322.                 sbParams.append(entry.getValue());  
    323.                 sbParams.append("&");  
    324.             }  
    325.         }  
    326.         BufferedReader br = null;  
    327.         try {  
    328.             URL url = null;  
    329.             if (sbParams != null && sbParams.length() > 0) {  
    330.                 url = new URL(urlParam + "?" + sbParams.substring(0, sbParams.length() - 1));  
    331.             } else {  
    332.                 url = new URL(urlParam);  
    333.             }  
    334.             URLConnection con = url.openConnection();  
    335.             // 设置请求属性  
    336.             con.setRequestProperty("accept", "*/*");  
    337.             con.setRequestProperty("connection", "Keep-Alive");  
    338.             con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");  
    339.             con.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");  
    340.             // 建立连接  
    341.             con.connect();  
    342.             resultBuffer = new StringBuffer();  
    343.             br = new BufferedReader(new InputStreamReader(con.getInputStream(), charset));  
    344.             String temp;  
    345.             while ((temp = br.readLine()) != null) {  
    346.                 resultBuffer.append(temp);  
    347.             }  
    348.         } catch (Exception e) {  
    349.             throw new RuntimeException(e);  
    350.         } finally {  
    351.             if (br != null) {  
    352.                 try {  
    353.                     br.close();  
    354.                 } catch (IOException e) {  
    355.                     br = null;  
    356.                     throw new RuntimeException(e);  
    357.                 }  
    358.             }  
    359.         }  
    360.         return resultBuffer.toString();  
    361.     }  
    362.   
    363.     /**  
    364.      * @Description:使用HttpClient发送post请求  
    365.      * @author:liuyc  
    366.      * @time:2016年5月17日 下午3:28:23  
    367.      */  
    368.     public static String httpClientPost(String urlParam, Map<String, Object> params, String charset) {  
    369.         StringBuffer resultBuffer = null;  
    370.         HttpClient client = new DefaultHttpClient();  
    371.         HttpPost httpPost = new HttpPost(urlParam);  
    372.         // 构建请求参数  
    373.         List<NameValuePair> list = new ArrayList<NameValuePair>();  
    374.         Iterator<Entry<String, Object>> iterator = params.entrySet().iterator();  
    375.         while (iterator.hasNext()) {  
    376.             Entry<String, Object> elem = iterator.next();  
    377.             list.add(new BasicNameValuePair(elem.getKey(), String.valueOf(elem.getValue())));  
    378.         }  
    379.         BufferedReader br = null;  
    380.         try {  
    381.             if (list.size() > 0) {  
    382.                 UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list, charset);  
    383.                 httpPost.setEntity(entity);  
    384.             }  
    385.             HttpResponse response = client.execute(httpPost);  
    386.             // 读取服务器响应数据  
    387.             resultBuffer = new StringBuffer();  
    388.             br = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));  
    389.             String temp;  
    390.             while ((temp = br.readLine()) != null) {  
    391.                 resultBuffer.append(temp);  
    392.             }  
    393.         } catch (Exception e) {  
    394.             throw new RuntimeException(e);  
    395.         } finally {  
    396.             if (br != null) {  
    397.                 try {  
    398.                     br.close();  
    399.                 } catch (IOException e) {  
    400.                     br = null;  
    401.                     throw new RuntimeException(e);  
    402.                 }  
    403.             }  
    404.         }  
    405.         return resultBuffer.toString();  
    406.     }  
    407.   
    408.     /** 
    409.      * @Description:使用HttpClient发送get请求 
    410.      * @author:liuyc 
    411.      * @time:2016年5月17日 下午3:28:56 
    412.      */  
    413.     public static String httpClientGet(String urlParam, Map<String, Object> params, String charset) {  
    414.         StringBuffer resultBuffer = null;  
    415.         HttpClient client = new DefaultHttpClient();  
    416.         BufferedReader br = null;  
    417.         // 构建请求参数  
    418.         StringBuffer sbParams = new StringBuffer();  
    419.         if (params != null && params.size() > 0) {  
    420.             for (Entry<String, Object> entry : params.entrySet()) {  
    421.                 sbParams.append(entry.getKey());  
    422.                 sbParams.append("=");  
    423.                 try {  
    424.                     sbParams.append(URLEncoder.encode(String.valueOf(entry.getValue()), charset));  
    425.                 } catch (UnsupportedEncodingException e) {  
    426.                     throw new RuntimeException(e);  
    427.                 }  
    428.                 sbParams.append("&");  
    429.             }  
    430.         }  
    431.         if (sbParams != null && sbParams.length() > 0) {  
    432.             urlParam = urlParam + "?" + sbParams.substring(0, sbParams.length() - 1);  
    433.         }  
    434.         HttpGet httpGet = new HttpGet(urlParam);  
    435.         try {  
    436.             HttpResponse response = client.execute(httpGet);  
    437.             // 读取服务器响应数据  
    438.             br = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));  
    439.             String temp;  
    440.             resultBuffer = new StringBuffer();  
    441.             while ((temp = br.readLine()) != null) {  
    442.                 resultBuffer.append(temp);  
    443.             }  
    444.         } catch (Exception e) {  
    445.             throw new RuntimeException(e);  
    446.         } finally {  
    447.             if (br != null) {  
    448.                 try {  
    449.                     br.close();  
    450.                 } catch (IOException e) {  
    451.                     br = null;  
    452.                     throw new RuntimeException(e);  
    453.                 }  
    454.             }  
    455.         }  
    456.         return resultBuffer.toString();  
    457.     }  
    458.   
    459.     /** 
    460.      * @Description:使用socket发送post请求 
    461.      * @author:liuyc 
    462.      * @time:2016年5月18日 上午9:26:22 
    463.      */  
    464.     public static String sendSocketPost(String urlParam, Map<String, Object> params, String charset) {  
    465.         String result = "";  
    466.         // 构建请求参数  
    467.         StringBuffer sbParams = new StringBuffer();  
    468.         if (params != null && params.size() > 0) {  
    469.             for (Entry<String, Object> entry : params.entrySet()) {  
    470.                 sbParams.append(entry.getKey());  
    471.                 sbParams.append("=");  
    472.                 sbParams.append(entry.getValue());  
    473.                 sbParams.append("&");  
    474.             }  
    475.         }  
    476.         Socket socket = null;  
    477.         OutputStreamWriter osw = null;  
    478.         InputStream is = null;  
    479.         try {  
    480.             URL url = new URL(urlParam);  
    481.             String host = url.getHost();  
    482.             int port = url.getPort();  
    483.             if (-1 == port) {  
    484.                 port = 80;  
    485.             }  
    486.             String path = url.getPath();  
    487.             socket = new Socket(host, port);  
    488.             StringBuffer sb = new StringBuffer();  
    489.             sb.append("POST " + path + " HTTP/1.1 ");  
    490.             sb.append("Host: " + host + " ");  
    491.             sb.append("Connection: Keep-Alive ");  
    492.             sb.append("Content-Type: application/x-www-form-urlencoded; charset=utf-8  ");  
    493.             sb.append("Content-Length: ").append(sb.toString().getBytes().length).append(" ");  
    494.             // 这里一个回车换行，表示消息头写完，不然服务器会继续等待  
    495.             sb.append(" ");  
    496.             if (sbParams != null && sbParams.length() > 0) {  
    497.                 sb.append(sbParams.substring(0, sbParams.length() - 1));  
    498.             }  
    499.             osw = new OutputStreamWriter(socket.getOutputStream());  
    500.             osw.write(sb.toString());  
    501.             osw.flush();  
    502.             is = socket.getInputStream();  
    503.             String line = null;  
    504.             // 服务器响应体数据长度  
    505.             int contentLength = 0;  
    506.             // 读取http响应头部信息  
    507.             do {  
    508.                 line = readLine(is, 0, charset);  
    509.                 if (line.startsWith("Content-Length")) {  
    510.                     // 拿到响应体内容长度  
    511.                     contentLength = Integer.parseInt(line.split(":")[1].trim());  
    512.                 }  
    513.                 // 如果遇到了一个单独的回车换行，则表示请求头结束  
    514.             } while (!line.equals(" "));  
    515.             // 读取出响应体数据（就是你要的数据）  
    516.             result = readLine(is, contentLength, charset);  
    517.         } catch (Exception e) {  
    518.             throw new RuntimeException(e);  
    519.         } finally {  
    520.             if (osw != null) {  
    521.                 try {  
    522.                     osw.close();  
    523.                 } catch (IOException e) {  
    524.                     osw = null;  
    525.                     throw new RuntimeException(e);  
    526.                 } finally {  
    527.                     if (socket != null) {  
    528.                         try {  
    529.                             socket.close();  
    530.                         } catch (IOException e) {  
    531.                             socket = null;  
    532.                             throw new RuntimeException(e);  
    533.                         }  
    534.                     }  
    535.                 }  
    536.             }  
    537.             if (is != null) {  
    538.                 try {  
    539.                     is.close();  
    540.                 } catch (IOException e) {  
    541.                     is = null;  
    542.                     throw new RuntimeException(e);  
    543.                 } finally {  
    544.                     if (socket != null) {  
    545.                         try {  
    546.                             socket.close();  
    547.                         } catch (IOException e) {  
    548.                             socket = null;  
    549.                             throw new RuntimeException(e);  
    550.                         }  
    551.                     }  
    552.                 }  
    553.             }  
    554.         }  
    555.         return result;  
    556.     }  
    557.   
    558.     /** 
    559.      * @Description:使用socket发送get请求 
    560.      * @author:liuyc 
    561.      * @time:2016年5月18日 上午9:27:18 
    562.      */  
    563.     public static String sendSocketGet(String urlParam, Map<String, Object> params, String charset) {  
    564.         String result = "";  
    565.         // 构建请求参数  
    566.         StringBuffer sbParams = new StringBuffer();  
    567.         if (params != null && params.size() > 0) {  
    568.             for (Entry<String, Object> entry : params.entrySet()) {  
    569.                 sbParams.append(entry.getKey());  
    570.                 sbParams.append("=");  
    571.                 sbParams.append(entry.getValue());  
    572.                 sbParams.append("&");  
    573.             }  
    574.         }  
    575.         Socket socket = null;  
    576.         OutputStreamWriter osw = null;  
    577.         InputStream is = null;  
    578.         try {  
    579.             URL url = new URL(urlParam);  
    580.             String host = url.getHost();  
    581.             int port = url.getPort();  
    582.             if (-1 == port) {  
    583.                 port = 80;  
    584.             }  
    585.             String path = url.getPath();  
    586.             socket = new Socket(host, port);  
    587.             StringBuffer sb = new StringBuffer();  
    588.             sb.append("GET " + path + " HTTP/1.1 ");  
    589.             sb.append("Host: " + host + " ");  
    590.             sb.append("Connection: Keep-Alive ");  
    591.             sb.append("Content-Type: application/x-www-form-urlencoded; charset=utf-8  ");  
    592.             sb.append("Content-Length: ").append(sb.toString().getBytes().length).append(" ");  
    593.             // 这里一个回车换行，表示消息头写完，不然服务器会继续等待  
    594.             sb.append(" ");  
    595.             if (sbParams != null && sbParams.length() > 0) {  
    596.                 sb.append(sbParams.substring(0, sbParams.length() - 1));  
    597.             }  
    598.             osw = new OutputStreamWriter(socket.getOutputStream());  
    599.             osw.write(sb.toString());  
    600.             osw.flush();  
    601.             is = socket.getInputStream();  
    602.             String line = null;  
    603.             // 服务器响应体数据长度  
    604.             int contentLength = 0;  
    605.             // 读取http响应头部信息  
    606.             do {  
    607.                 line = readLine(is, 0, charset);  
    608.                 if (line.startsWith("Content-Length")) {  
    609.                     // 拿到响应体内容长度  
    610.                     contentLength = Integer.parseInt(line.split(":")[1].trim());  
    611.                 }  
    612.                 // 如果遇到了一个单独的回车换行，则表示请求头结束  
    613.             } while (!line.equals(" "));  
    614.             // 读取出响应体数据（就是你要的数据）  
    615.             result = readLine(is, contentLength, charset);  
    616.         } catch (Exception e) {  
    617.             throw new RuntimeException(e);  
    618.         } finally {  
    619.             if (osw != null) {  
    620.                 try {  
    621.                     osw.close();  
    622.                 } catch (IOException e) {  
    623.                     osw = null;  
    624.                     throw new RuntimeException(e);  
    625.                 } finally {  
    626.                     if (socket != null) {  
    627.                         try {  
    628.                             socket.close();  
    629.                         } catch (IOException e) {  
    630.                             socket = null;  
    631.                             throw new RuntimeException(e);  
    632.                         }  
    633.                     }  
    634.                 }  
    635.             }  
    636.             if (is != null) {  
    637.                 try {  
    638.                     is.close();  
    639.                 } catch (IOException e) {  
    640.                     is = null;  
    641.                     throw new RuntimeException(e);  
    642.                 } finally {  
    643.                     if (socket != null) {  
    644.                         try {  
    645.                             socket.close();  
    646.                         } catch (IOException e) {  
    647.                             socket = null;  
    648.                             throw new RuntimeException(e);  
    649.                         }  
    650.                     }  
    651.                 }  
    652.             }  
    653.         }  
    654.         return result;  
    655.     }  
    656.   
    657.     /** 
    658.      * @Description:读取一行数据，contentLe内容长度为0时，读取响应头信息，不为0时读正文 
    659.      * @time:2016年5月17日 下午6:11:07 
    660.      */  
    661.     private static String readLine(InputStream is, int contentLength, String charset) throws IOException {  
    662.         List<Byte> lineByte = new ArrayList<Byte>();  
    663.         byte tempByte;  
    664.         int cumsum = 0;  
    665.         if (contentLength != 0) {  
    666.             do {  
    667.                 tempByte = (byte) is.read();  
    668.                 lineByte.add(Byte.valueOf(tempByte));  
    669.                 cumsum++;  
    670.             } while (cumsum < contentLength);// cumsum等于contentLength表示已读完  
    671.         } else {  
    672.             do {  
    673.                 tempByte = (byte) is.read();  
    674.                 lineByte.add(Byte.valueOf(tempByte));  
    675.             } while (tempByte != 10);// 换行符的ascii码值为10  
    676.         }  
    677.   
    678.         byte[] resutlBytes = new byte[lineByte.size()];  
    679.         for (int i = 0; i < lineByte.size(); i++) {  
    680.             resutlBytes[i] = (lineByte.get(i)).byteValue();  
    681.         }  
    682.         return new String(resutlBytes, charset);  
    683.     }  
    684.       
    685. }  
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  • 原文地址：https://www.cnblogs.com/cxxjohnson/p/7816698.html
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