package com.test; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.URL; import java.net.URLConnection; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Map.Entry; import java.util.Set; public class HttpRequest { /** * 向指定URL发送GET方法的请求 * * @param url * 发送请求的URL * @param param * 请求参数,请求参数应该是 name1=value1&name2=value2 的形式。 * @return URL 所代表远程资源的响应结果 */ public static String sendGet(String url, String param) { String result = ""; BufferedReader in = null; try { String urlNameString = url + "?" + param; URL realUrl = new URL(urlNameString); // 打开和URL之间的连接 URLConnection connection = realUrl.openConnection(); connection.setRequestProperty("Charsert", "UTF-8"); // 设置通用的请求属性 connection.setRequestProperty("accept", "*/*"); connection.setRequestProperty("connection", "Keep-Alive"); connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); // 建立实际的连接 connection.connect(); // 获取所有响应头字段 Map<String, List<String>> map = connection.getHeaderFields(); // 遍历所有的响应头字段 for (String key : map.keySet()) { System.out.println(key + "--->" + map.get(key)); } // 定义 BufferedReader输入流来读取URL的响应 in = new BufferedReader(new InputStreamReader( connection.getInputStream(),"utf-8")); String line; while ((line = in.readLine()) != null) { result += line; } } catch (Exception e) { System.out.println("发送GET请求出现异常!" + e); e.printStackTrace(); } // 使用finally块来关闭输入流 finally { try { if (in != null) { in.close(); } } catch (Exception e2) { e2.printStackTrace(); } } return result; } /** * 向指定 URL 发送POST方法的请求 * * @param url * 发送请求的 URL * @param param * 请求参数,请求参数应该是 name1=value1&name2=value2 的形式。 * @return 所代表远程资源的响应结果 */ public static String sendPost(String url, String param) throws RuntimeException{ PrintWriter out = null; BufferedReader in = null; String result = ""; try { URL realUrl = new URL(url); // 打开和URL之间的连接 URLConnection conn = realUrl.openConnection(); conn.setRequestProperty("Charsert", "UTF-8"); // 设置通用的请求属性 conn.setRequestProperty("accept", "*/*"); conn.setRequestProperty("connection", "Keep-Alive"); conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); conn.setRequestProperty("Content-Type", "application/json"); // 发送POST请求必须设置如下两行 conn.setDoOutput(true); conn.setDoInput(true); // 获取URLConnection对象对应的输出流 out = new PrintWriter(conn.getOutputStream()); // 发送请求参数 out.print(param); // flush输出流的缓冲 out.flush(); // 定义BufferedReader输入流来读取URL的响应 in = new BufferedReader( new InputStreamReader(conn.getInputStream(), "utf-8")); String line; while ((line = in.readLine()) != null) { result += line; } } catch (Exception e) { System.out.println("发送 POST 请求出现异常!"+e); e.printStackTrace(); throw new RuntimeException("推送消息失败"); } //使用finally块来关闭输出流、输入流 finally{ try{ if(out!=null){ out.close(); } if(in!=null){ in.close(); } } catch(IOException ex){ ex.printStackTrace(); } } return result; } /** * 发送json格式请求 * @param url 请求路径 * @param param json字符串 * @return * @throws RuntimeException */ public static String sendPostByJSON(String url, String param) throws RuntimeException{ PrintWriter out = null; BufferedReader in = null; String result = ""; try { URL realUrl = new URL(url); // 打开和URL之间的连接 URLConnection conn = realUrl.openConnection(); conn.setRequestProperty("Charsert", "UTF-8"); // 设置通用的请求属性 conn.setRequestProperty("accept", "*/*"); conn.setRequestProperty("connection", "Keep-Alive"); conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); conn.setRequestProperty("Content-Type", "application/json"); // 发送POST请求必须设置如下两行 conn.setDoOutput(true); conn.setDoInput(true); // 获取URLConnection对象对应的输出流 out = new PrintWriter(conn.getOutputStream()); // 发送请求参数 out.print(param); // flush输出流的缓冲 out.flush(); // 定义BufferedReader输入流来读取URL的响应 in = new BufferedReader( new InputStreamReader(conn.getInputStream(), "utf-8")); String line; while ((line = in.readLine()) != null) { result += line; } } catch (Exception e) { System.out.println("发送 JSON POST 请求出现异常!"+e); e.printStackTrace(); throw new RuntimeException("推送消息失败"); } //使用finally块来关闭输出流、输入流 finally{ try{ if(out!=null){ out.close(); } if(in!=null){ in.close(); } } catch(IOException ex){ ex.printStackTrace(); } } return result; } public static String sendGet(String url,Map<String,Object> param){ return sendGet(url, convertMap(param)); } public static String sendPost(String url,Map<String,Object> param){ return sendPost(url, convertMap(param)); }
//测试 public static void main(String[] args) { //发送 GET请求
// 第一种方式 Map<String,Object> param = new HashMap<String,Object>(); param.put("userName", "xxx"); param.put("userPwd", "666666"); //拼接后的请求: http://127.0.0.1:8888/xx/xx?userName=xxx&userPwd=666666 String sr= HttpRequest.sendGet("http://127.0.0.1:8888/xx/xx", param); System.out.println(sr);
//第二种方式
String sr= HttpRequest.sendGet("http://127.0.0.1:8888/xx/xx", "userName=xxx&userPwd=666666");
//POST同理
//请求新浪api根据ip查找城市
String result2 = HttpRequest.sendGet("http://int.dpool.sina.com.cn/iplookup/iplookup.php","format=json&ip=120.237.91.74");
String result = HttpRequest.sendGet("http://ip.taobao.com/service/getIpInfo.php","ip=120.237.91.74");
System.out.println("result====" +result);
System.out.println("result2====" +result2);
} private static String convertMap(Map<String,Object> param){ StringBuffer sbf = new StringBuffer(); if(param!=null){ Set<Entry<String, Object>> entrySet = param.entrySet(); for(Entry<String,Object> entry:entrySet){ String key = entry.getKey(); Object value = entry.getValue(); sbf.append(key); sbf.append("="); sbf.append(value); sbf.append("&"); } } String paramStr =""; if(sbf.length()>0) paramStr = sbf.substring(0, sbf.lastIndexOf("&")); return paramStr; } }
最后在实际使用的过程中遇到一个问题, 这两个api单独使用,经常性的请求不成功,后台提示连接超时
个人感觉淘宝的成功率比新浪的高,测试过程中,新浪没有出现过一次.......
可以考虑使用百度地图提供的接口