java-用HttpURLConnection发送Http请求.
注意：利用URL发送的请求，服务器只返回实体部分，不包括http信息头部分的内容.
package cn.itcast.httpserver;import java.io.BufferedReader;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL;public class TestURLConnection {public static void main(String[] args) throws Exception {URL url = new URL("http://127.0.0.1/index.html");HttpURLConnection connection = (HttpURLConnection) url.openConnection();//connection.getInputStream() 调用该方法才正在意义上去取数据BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));String s =null;while((s=reader.readLine())!=null){System.out.println(s);}reader.close();connection.disconnect();}}