String str_url = "http://127.0.0.1:8080?name=xxx";

URL url = new URL(str_url);

System.out.println(url.getProtocol());  //协议

System.out.println(url.getHost());     //主机

System.out.println(url.getPort());

System.out.println(url.getPath());

System.out.println(url.getFile());    //?name=xxx

System.out.println(url.getQuery());   //name=xxx

//通过openConnection；获取到该远程资源的连接对象

URLConnection conn = url.openConnection();

System.out.println(conn);

//调用连接对象的读取方法，准备读取资源

InputStream in = conn.getInputStream();

byte[] buf = new byte[1024];

int len = 0;

len = in.read(buf);

String res = new String(buf,0,len);

System.out.println(len);

System.out.println(res);