Java发送HTTP请求-POST

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HTTP请求的POST

1、自己要运行的话把paramValue换成用httpwatch抓到的request文本

2、PrintWriter是写文本文件、流文件的类

import java.io.BufferedReader;

import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.*;
public class JavaHTTPHandle {

   public static void main(String[] args) {
       // TODO Auto-generated method stub
       JavaHTTPHandle jhh = new JavaHTTPHandle();
       jhh.sendPost("https://passport.csdn.net/account/login;jsessionid=52C34ADF27D7F89D459507FE1EB11EAC.tomcat1?from=http://my.csdn.net/my/mycsdn", "username=admin&password=123456&lt=LT-21772-6OpT4r2IEleScWYxx3Q6X7Es52balz&execution=e1s1&_eventId=submit");

   }
   public void sendPost(String urlAddress,String paramValue) {
       try {

           //建立连接并发送请求
           HttpURLConnection urlConnection = null;
           URL url = new URL(urlAddress);
           //强制转化
           urlConnection = (HttpURLConnection) url.openConnection();
           //超时时间
           urlConnection.setConnectTimeout(5000);
           //设置读的超时时间，5s还未获取到响应就放弃
           urlConnection.setReadTimeout(5000);
           //是否使用缓存
           urlConnection.setUseCaches(false);
           urlConnection.setDoOutput(true);
           urlConnection.connect();

           PrintWriter pw = new PrintWriter(urlConnection.getOutputStream());
           pw.print(paramValue);
            pw.flush();

           //获取响应 urlConnection.getInputStream()获取缓存,从输入流中读
           BufferedReader bf = new BufferedReader(new InputStreamReader(urlConnection.getInputStream(),"UTF-8"));
           String line = bf.readLine();//读取一行
           while (line != null) {
               System.out.println(line);
               line = bf.readLine();
           }
       } catch (Exception e) {
           e.printStackTrace();
       }
   }
}

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