学步园

使用URL的API获取URL中的各部分内容，如host，端口等

	public static void main(String[] args) {
		URL hp = new URL("http://www.test.com:80");
		System.out.println("Protocol: " + hp.getProtocol());
		System.out.println("Port: " + hp.getPort());
		System.out.println("Host: " + hp.getHost());
		System.out.println("File: " + hp.getFile());
		System.out.println("Ext:" + hp.toExternalForm());
	}

结果如下：

Protocol: http
Port: 80
Host: www.test.com
File: 
Ext:http://www.test.com:80