你的位置:首页 > Java教程

[Java教程]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