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package com.demo.demo;
import org.json.JSONObject;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestMapping;
import javax.servlet.http.HttpServletRequest;import java.io.BufferedReader;import java.io.InputStreamReader; @Controller@RequestMapping("/user")public class controller {
 @RequestMapping("/init") public String init(Model model, HttpServletRequest request) throws Exception{ //get接收请求参数// System.out.println("-----get接收请求参数:------");// String user = request.getParameter("user");// String str = request.getParameter("str");// model.addAttribute("user",user);// model.addAttribute("str",str);
 //post接收请求参数 InputStreamReader reader = new InputStreamReader(request.getInputStream()); BufferedReader buffer = new BufferedReader(reader);        String requestData = buffer.readLine(); System.out.println("post接收请求参数:"+requestD); JSONObject obj = new JSONObject(requestD); String user = obj.get("user").toString(); String str = obj.get("str").toString(); model.addAttribute("user",user);        model.addAttribute("str",str); return "init";    }}

package com.demo.demo;
import java.io.BufferedReader;import java.io.DataOutputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.net.HttpURLConnection;import java.net.URL; public class HttpDemo {
    // get方式请求 private static void httpURLGETRequest() { String methodUrl = "http://127.0.0.1:8080/user/init?str=5&user=6"; HttpURLConnection connection = null; BufferedReader reader = null; String line = null; try { URL url = new URL(methodUrl); // 根据url生成HttpURLConnection connection = (HttpURLConnection) url.openConnection(); // 默认GET请求 connection.setRequestMethod("GET"); // 建立TCP连接 connection.connect(); if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) { //返回数据 // 发送http请求 reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8")); StringBuilder result = new StringBuilder();                // 循环读取流,返回请求 while ((line = reader.readLine()) != null) { result.append(line).append(System.getProperty("line.separator"));// "\n" } System.out.println("参数："+result.toString()); } } catch (Exception e) { e.printStackTrace(); } finally { try { reader.close(); } catch (Exception e) { e.printStackTrace(); } connection.disconnect(); } }
 public static void main(String[] args) {// HttpDemo.httpURLGETRequest(); HttpDemo.httpURLPOSTRequest();    }           // post方式请求 private static void httpURLPOSTRequest() { String methodUrl = "http://127.0.0.1:8080/user/init"; HttpURLConnection connection = null; OutputStream dataout = null; BufferedReader reader = null; String line = null; try { URL url = new URL(methodUrl); // 根据URL生成HttpURLConnection connection = (HttpURLConnection) url.openConnection(); // 设置是否向connection输出，因为这个是post请求，参数要放在http正文内，因此需要设为true,默认情况下是false connection.setDoOutput(true); // 设置是否从connection读入，默认情况下是true; connection.setDoInput(true);  // 设置请求方式为post,默认GET请求 connection.setRequestMethod("POST"); // post请求不能使用缓存设为false connection.setUseCaches(false); // 连接主机的超时时间 connection.setConnectTimeout(3000); // 从主机读取数据的超时时间 connection.setReadTimeout(3000); // 设置该HttpURLConnection实例是否自动执行重定向 connection.setInstanceFollowRedirects(true); connection.setRequestProperty("connection", "Keep-Alive");// 连接复用            connection.setRequestProperty("charset", "utf-8"); connection.setRequestProperty("Content-Type", "application/json"); connection.setRequestProperty("Authorization", "Bearer 66cb225f1c3ff0ddfdae31rae2b57488aadfb8b5e7"); // 建立TCP连接,getOutputStream会隐含的进行connect,所以此处可以不要 connection.connect();            dataout = new DataOutputStream(connection.getOutputStream());// 创建输入输出流,用于往连接里面输出携带的参数 String body = "{\"str\":\"123\",\"user\":\"123\"}"; dataout.write(body.getBytes()); dataout.flush(); dataout.close();
 //添加参数// String strValue = "str";// String userValue = "user";// OutputStream outputStream = connection.getOutputStream();// String data = "str="+strValue+"&user="+userValue;//拼装参数// outputStream.write(data.getBytes());//上传参数// outputStream.flush();// outputStream.close();
 if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) { reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));// 发送http请求 StringBuilder result = new StringBuilder(); // 循环读取流，返回请求数据 while ((line = reader.readLine()) != null) { result.append(line).append(System.getProperty("line.separator"));// } System.out.println(result.toString()); }  } catch (Exception e) { e.printStackTrace(); } finally { try { reader.close(); } catch (Exception e) { e.printStackTrace(); } connection.disconnect(); }    }}