026.7 网络编程 URL对象

通过一个程序理解java的url对象。

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);