如何使用JAVA请求HTTP

package com.st.test;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;

import com.st.util.DesEcbUtil;

/**
 * @description
 *
 * @author wangkang
 *
 * @date 2017-5-18 下午3:02:20
 *
 * @version 1.0
 */
public class TestHttps {

    /**
     * @description
     *
     * @author wangkang
     * @throws IOException
     * @throws UnsupportedEncodingException
     *
     * @date 2017-5-18 下午3:02:20
     */
    public static void main(String[] args) throws UnsupportedEncodingException, IOException {
        
　　　　　String testUrl = "http://*";
        URL url = new URL(testUrl);
        HttpURLConnection conn = (HttpURLConnection)url.openConnection();
        conn.setRequestMethod("POST");
        conn.setDoOutput(true);
        conn.getOutputStream().write("请求内容".getBytes("GBK"));
        InputStream inStream=conn.getInputStream();
        BufferedReader reader = new BufferedReader(new InputStreamReader(inStream,"UTF-8"));
        String line = null;
        StringBuffer buffer = new StringBuffer();
        while((line = reader.readLine()) != null){
            buffer.append(line);
        }
        System.out.println("结果："+buffer.toString());
        conn.disconnect();
    }

}