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());
		}	
	}
}