java后台模拟浏览器请求--GET/POST

package com.cplatform.movie.back.test;import java.io.BufferedReader; import java.io.DataOutputStream; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; import java.net.URLEncoder;public class HttpURLConnectionTest {     public static final String GET_URL = "http://112.4.27.9/mall-back/if_user/store_list?storeId=32";     public static final String POST_URL = "http://112.4.27.9/mall-back/if_user/store_list";     /**      * 接口调用 GET      */     public static void httpURLConectionGET() {         try {             URL url = new URL(GET_URL);    // 把字符串转换为URL请求地址            HttpURLConnection connection = (HttpURLConnection) url.openConnection();// 打开连接            connection.connect();// 连接会话            // 获取输入流            BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream()));             String line;             StringBuilder sb = new StringBuilder();             while ((line = br.readLine()) != null) {// 循环读取流                sb.append(line);             }             br.close();// 关闭流            connection.disconnect();// 断开连接            System.out.println(sb.toString());         } catch (Exception e) {             e.printStackTrace();             System.out.println("失败!");         }     }     /**      * 接口调用  POST      */     public static void httpURLConnectionPOST () {         try {             URL url = new URL(POST_URL);             // 将url 以 open方法返回的urlConnection  连接强转为HttpURLConnection连接  (标识一个url所引用的远程对象连接)             HttpURLConnection connection = (HttpURLConnection) url.openConnection();// 此时cnnection只是为一个连接对象,待连接中             // 设置连接输出流为true,默认false (post 请求是以流的方式隐式的传递参数)             connection.setDoOutput(true);             // 设置连接输入流为true             connection.setDoInput(true);             // 设置请求方式为post             connection.setRequestMethod("POST");             // post请求缓存设为false             connection.setUseCaches(false);             // 设置该HttpURLConnection实例是否自动执行重定向            connection.setInstanceFollowRedirects(true);             // 设置请求头里面的各个属性 (以下为设置内容的类型,设置为经过urlEncoded编码过的from参数)             // application/x-javascript text/xml->xml数据              //application/x-javascript->json对象               //application/x-www-form-urlencoded->表单数据             //这是重点^_^            connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");             // 建立连接 (请求未开始,直到connection.getInputStream()方法调用时才发起,以上各个参数设置需在此方法之前进行)             connection.connect();             // 创建输入输出流,用于往连接里面输出携带的参数,(输出内容为?后面的内容)             DataOutputStream dataout = new DataOutputStream(connection.getOutputStream());             String parm = "storeId=" + URLEncoder.encode("32", "utf-8"); //URLEncoder.encode()方法  为字符串进行编码             // 将参数输出到连接            dataout.writeBytes(parm);             // 输出完成后刷新并关闭流            dataout.flush();             dataout.close(); // 重要且易忽略步骤 (关闭流,切记!)              System.out.println(connection.getResponseCode());             // 连接发起请求,处理服务器响应  (从连接获取到输入流并包装为bufferedReader)             BufferedReader bf = new BufferedReader(new InputStreamReader(connection.getInputStream()));              String line;             StringBuilder sb = new StringBuilder(); // 用来存储响应数据             // 循环读取流,若不到结尾处            while ((line = bf.readLine()) != null) {                 sb.append(bf.readLine());             }             bf.close();    // 重要且易忽略步骤 (关闭流,切记!)              connection.disconnect(); // 销毁连接            System.out.println(sb.toString());         } catch (Exception e) {             e.printStackTrace();         }     }     public static void main(String[] args) { //        httpURLConectionGET();         httpURLConnectionPOST();     } }