java-用HttpURLConnection发送Http请求.

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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();
}

}