JAVA使用原始HttpURLConnection发送POST数据

时间：2023-03-09 18:51:20
JAVA使用原始HttpURLConnection发送POST数据 
package com.newflypig.demo;

/**

 * 使用jdk自带的HttpURLConnection向URL发送POST请求并输出响应结果

 * 参数使用流传递，并且硬编码为字符串"name=XXX"的格式

 */

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 SendPostDemo {

	public static void main(String[] args) throws Exception{

		String urlPath = new String("http://localhost:8080/Test1/HelloWorld");

		//String urlPath = new String("http://localhost:8080/Test1/HelloWorld?name=丁丁".getBytes("UTF-8"));

		String param="name="+URLEncoder.encode("丁丁","UTF-8");

		//建立连接

		URL url=new URL(urlPath);

		HttpURLConnection httpConn=(HttpURLConnection)url.openConnection();

		//设置参数

		httpConn.setDoOutput(true);		//需要输出

		httpConn.setDoInput(true);		//需要输入

		httpConn.setUseCaches(false); 	//不允许缓存

		httpConn.setRequestMethod("POST"); 		//设置POST方式连接

		//设置请求属性

		httpConn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

		httpConn.setRequestProperty("Connection", "Keep-Alive");// 维持长连接

		httpConn.setRequestProperty("Charset", "UTF-8");

		//连接,也可以不用明文connect，使用下面的httpConn.getOutputStream()会自动connect

		httpConn.connect();

		//建立输入流，向指向的URL传入参数

		DataOutputStream dos=new DataOutputStream(httpConn.getOutputStream());

		dos.writeBytes(param);

		dos.flush();

		dos.close();

		//获得响应状态

		int resultCode=httpConn.getResponseCode();

		if(HttpURLConnection.HTTP_OK==resultCode){

			StringBuffer sb=new StringBuffer();

			String readLine=new String();

			BufferedReader responseReader=new BufferedReader(new InputStreamReader(httpConn.getInputStream(),"UTF-8"));

			while((readLine=responseReader.readLine())!=null){

				sb.append(readLine).append("\n");

			}

			responseReader.close();

			System.out.println(sb.toString());

		}

	}

}

　　

JAVA使用HttpURLConnection发送POST数据是依靠OutputStream流的形式发送

具体编码过程中，参数是以字符串“name=XXX”这种形式发送

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