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HttpClient的get+post请求使用

啥都不说，先上代码

  1 import java.io.BufferedReader;
  2 import java.io.IOException;
  3 import java.io.InputStreamReader;
  4 import java.util.ArrayList;
  5 import java.util.List;
  6 import java.util.Map;
  7 
  8 import org.apache.http.HttpEntity;
  9 import org.apache.http.HttpStatus;
 10 import org.apache.http.NameValuePair;
 11 import org.apache.http.client.ClientProtocolException;
 12 import org.apache.http.client.entity.UrlEncodedFormEntity;
 13 import org.apache.http.client.methods.CloseableHttpResponse;
 14 import org.apache.http.client.methods.HttpGet;
 15 import org.apache.http.client.methods.HttpPost;
 16 import org.apache.http.client.methods.HttpRequestBase;
 17 import org.apache.http.config.Registry;
 18 import org.apache.http.config.RegistryBuilder;
 19 import org.apache.http.conn.socket.ConnectionSocketFactory;
 20 import org.apache.http.conn.socket.PlainConnectionSocketFactory;
 21 import org.apache.http.entity.StringEntity;
 22 import org.apache.http.impl.client.CloseableHttpClient;
 23 import org.apache.http.impl.client.HttpClientBuilder;
 24 import org.apache.http.impl.client.HttpClients;
 25 import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
 26 import org.apache.http.message.BasicNameValuePair;
 27 import org.apache.http.util.EntityUtils;
 28 import org.apache.log4j.Logger;
 29 
 30 import com.alibaba.fastjson.JSONObject;
 31 
 32 /**
 33  * http请求工具类
 34  * Created by swordxu on 15/8/5.
 35  */
 36 public class HttpClientUtils {
 37     private static Logger logger = Logger.getLogger(HttpClientUtils.class);
 38 
 39     //设置连接池线程最大数量
 40     private static final int MAX_TOTAL = 500;
 41     //设置单个路由最大的连接线程数量
 42     private static final int MAX_ROUTE_TOTAL = 500;
 43 
 44     private static final int REQUEST_TIMEOUT = 25000;
 45 
 46     private static final int REQUEST_SOCKET_TIME = 25000;
 47 
 48     private static final String ENCODING_UTF_8 = "UTF-8";
 49 
 50     private static HttpClientBuilder httpBulder = null;
 51     private static CloseableHttpClient httpClient = null;
 52 
 53     static{
 54 
 55         if (httpClient == null) {
 56             ConnectionSocketFactory httpFactory = PlainConnectionSocketFactory.getSocketFactory();
 57 
 58             Registry<ConnectionSocketFactory> registry = RegistryBuilder.<ConnectionSocketFactory> create().register("http", httpFactory).build();
 59             PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager(registry);
 60             cm.setMaxTotal(MAX_TOTAL);
 61 
 62             cm.setDefaultMaxPerRoute(MAX_ROUTE_TOTAL);
 63 
 64             httpClient = HttpClients.custom().setConnectionManager(cm)
 65                     .disableAutomaticRetries().build();
 66         }
 67 
 68     }
 69 
 70     /**
 71      * get请求方式
 72      * @param uri 请求url
 73      * @return
 74      */
 75     public String doGet(String uri) throws Exception{
 76         long b = System.currentTimeMillis();
 77         //CloseableHttpClient httpClient = null;
 78         CloseableHttpResponse response = null;
 79         HttpGet httpget = null;
 80         try {
 81             logger.debug("executing get request uri :" + uri);
 82 
 83             httpget = new HttpGet(uri);
 84             //httpClient = HttpClients.createDefault();
 85             response = httpClient.execute(httpget);
 86 
 87             if(response.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
 88                 HttpEntity entity = response.getEntity();
 89                 BufferedReader reader = new BufferedReader(new InputStreamReader(entity.getContent(), ENCODING_UTF_8));
 90                 String line = null;
 91                 StringBuilder sb = new StringBuilder();
 92                 while ((line = reader.readLine()) != null) {
 93                     sb.append(line);
 94                 }
 95                 logger.debug("response body :" + sb);
 96                 long e = System.currentTimeMillis();
 97                 logger.debug("executing post request time:" + (e -b));
 98 
 99                 EntityUtils.consume(entity);//关闭httpEntity流
100 
101                 return sb.toString();
102             }else{
103                 throw new Exception(response.getStatusLine().getStatusCode()+"");
104             }
105         } catch (ClientProtocolException e) {
106             logger.error("Failed to get request uri: "+uri,e);
107             throw new RuntimeException("Failed to post request uri: "+uri,e);
108         } catch (IOException e) {
109             logger.error("Failed to get request uri: "+uri,e);
110             throw new RuntimeException("Failed to post request uri: "+uri,e);
111         }finally {
112             close(httpget,response);
113         }
114     }
115     /**
116      * post 请求并返回实体对象
117      * @param url 请求url
118      * @param paramaters 请求参数
119      * @param clazz 返回Class
120      * @return
121      * @throws Exception
122      */
123     public static <T> T doPost(String url, Map<String, String> paramaters,Class<T> clazz) throws Exception{
124         String ret = post(url, paramaters, null);
125         return null != ret ? JSONObject.parseObject(ret, clazz) : null;
126     }
127 
128     /**
129      * 发送POST请求
130      * @param uri
131      * @return
132      */
133     public static String post(String uri) throws Exception{
134         return post(uri, null);
135     }
136 
137     /**
138      * 发送POST请求
139      * @param uri
140      * @param paramMap 请求参数
141      * @return
142      */
143     public static String post(String uri, Map<String, String> paramMap) throws Exception{
144         return post(uri, paramMap, null);
145     }
146 
147     /**
148      * post 请求
149      * @param uri 请求url
150      * @param paramMap 请求参数
151      * @param charset 请求编码
152      * @return
153      * @throws Exception
154      */
155     public static String post(String uri, Map<String, String> paramMap,String charset) throws Exception{
156         long b = System.currentTimeMillis();
157         CloseableHttpResponse response = null;
158         //CloseableHttpClient httpClient = null;
159         HttpPost httpPost = null;
160         try {
161             logger.debug("executing post request url:"+uri);
162 
163             httpPost = new HttpPost(uri);
164             httpPost.setEntity(new UrlEncodedFormEntity(handleData(paramMap),null == charset ? ENCODING_UTF_8 : charset));
165 
166             //httpClient = HttpClients.createDefault();
167             response = httpClient.execute(httpPost);
168             if(response.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
169                 HttpEntity entity = response.getEntity();
170                 BufferedReader reader = new BufferedReader(new InputStreamReader(entity.getContent(), ENCODING_UTF_8));
171                 String line = null;
172                 StringBuilder sb = new StringBuilder();
173                 while ((line = reader.readLine()) != null) {
174                     sb.append(line);
175                 }
176                 logger.debug("response body :" + sb);
177                 long e = System.currentTimeMillis();
178                 logger.debug("executing post request time:" + (e -b));
179 
180                 EntityUtils.consume(entity);//关闭流
181 
182                 return sb.toString();
183             }else{
184                 throw new Exception(response.getStatusLine().getStatusCode()+"");
185             }
186         } catch (Exception e) {
187             throw e;
188         }finally{
189             close(httpPost,response);
190         }
191     }
192 
193     /**
194      * post 请求
195      * @param url
196      * @param params
197      * @return
198      */
199     public static String doPost(String url, Map<String, String> params) throws Exception{
200         return post(url, params, null);
201     }
202 
203     /**
204      * post 请求
205      * @param url
206      * @param json
207      * @return
208      */
209     public static <T> T doPost(String url, String json, Class<T> clazz) throws Exception{
210         String ret = doPost(url, json);
211         return null != ret ? JSONObject.parseObject(ret, clazz) : null;
212     }
213 
214     /**
215      * post 请求
216      * @param url
217      * @param json
218      * @return
219      */
220     public static String doPost(String url, String json) throws Exception{
221         CloseableHttpResponse response = null;
222         HttpPost httpPost = null;
223         long b = System.currentTimeMillis();
224         try {
225             logger.debug("executing post request url:" + url);
226 
227             StringEntity s = new StringEntity(json,"UTF-8");
228             s.setContentType("application/json");
229 
230             httpPost = new HttpPost(url);
231             httpPost.setEntity(s);
232 
233             //httpClient = HttpClients.createDefault();
234             response = httpClient.execute(httpPost);
235 
236             if(response.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
237                 HttpEntity entity = response.getEntity();
238                 BufferedReader reader = new BufferedReader(new InputStreamReader(entity.getContent(), ENCODING_UTF_8));
239                 String line = null;
240                 StringBuilder sb = new StringBuilder();
241                 while ((line = reader.readLine()) != null) {
242                     sb.append(line);
243                 }
244                 logger.debug("response body :" + sb);
245                 long e = System.currentTimeMillis();
246                 logger.debug("executing post request time:" + (e -b));
247 
248                 EntityUtils.consume(entity);//关闭流
249 
250                 return sb.toString();
251             }else{
252                 throw new Exception(response.getStatusLine().getStatusCode()+"");
253             }
254         }finally{
255             close(httpPost,response);
256         }
257     }
258 
259     /**
260      * 处理map数据
261      * @param postData 请求数据
262      * @return
263      */
264     private static List<NameValuePair> handleData(Map<String, String> postData) {
265         List<NameValuePair> datas = new ArrayList<NameValuePair>();
266         for (Map.Entry<String,String> entry : postData.entrySet()) {
267             datas.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
268         }
269         return datas;
270     }
271     /**
272      * 关闭链接
273      * @param request
274      * @param response
275      */
276     private static void close(HttpRequestBase request,CloseableHttpResponse response){
277         if(null != response){
278             try {
279                 response.close();
280             } catch (IOException e) {
281                 e.printStackTrace();
282             }
283         }
284         if(null != request){
285             request.releaseConnection();
286         }
287     }

View Code

1、http的静态变量的相关设置

static{

        if (httpClient == null) {
            ConnectionSocketFactory httpFactory = PlainConnectionSocketFactory.getSocketFactory();

            Registry<ConnectionSocketFactory> registry = RegistryBuilder.<ConnectionSocketFactory> create().register("http", httpFactory).build();
            PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager(registry);
            cm.setMaxTotal(MAX_TOTAL);

            cm.setDefaultMaxPerRoute(MAX_ROUTE_TOTAL);
            
            httpClient = HttpClients.custom().setConnectionManager(cm)
                    .disableAutomaticRetries().build();
        }

    }

2.httpCliet的调用

String strResult = "";
		JSONObject jobj = new JSONObject();
		jobj.put("wxacc", wxacc);
		jobj.put("password", password);
		jobj.put("smallClassId", smallClassId);
		jobj.put("reportName", reportName);
		jobj.put("mobile", mobile);
		jobj.put("address", address);
		jobj.put("description", description);
		jobj.put("position", position);
		jobj.put("files", files);
		jobj.put("wxEvtFileList", wxEvtFileList);
		jobj.put("isreceipt", "true");

		String conResult;
		try {
			conResult = HttpClientUtils.doPost(saveEvtPreUrl, jobj.toJSONString());
			Head head = JSON.parseObject(conResult, Head.class);
			logger.debug(head.toString());
		} catch (Exception e) {
			e.printStackTrace();
		}

		return strResult;

　完~

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原文地址：https://www.cnblogs.com/fron/p/httpclient-20161120.html