Question

Java怎么判断URL是域名格式还是IP加端口格式？

Answer 1

简单的办法是判断host格式，复杂的但稳妥的办法是当做域名处理，域名解析，如果解析出来的IP和域名字符串相等，那就是说当做的域名，其实是ip。

try {
URL url=new URL("http://www.sina.com.cn");
String host=url.getHost();
InetAddress address = null;
address = InetAddress.getByName(host);
if(host.equalsIgnoreCase(address.getHostAddress()))
System.out.println("ip");
else
System.out.println("domain");
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

Answer 2

判断方法：
out; TODO Auto-generated catch block
e，那就是说当做的域名，如果解析出来的IP和域名字符串相等.printStackTrace();
} catch (MalformedURLException e) {
/简单的办法是判断host格式.cn" target="_blank">http;/://www，其实是ip.out.com，复杂的但稳妥的办法是当做域名处理.getByName(host);)://www;
else
System; TODO Auto-generated catch block
e;
InetAddress address = null;/.cn"); if(host.getHostAddress()))
System;domain".println(".printStackTrace();).println(".equalsIgnoreCase(address;
address = InetAddress，域名解析;ip".sina.getHost();
} catch (UnknownHostException e) {
/.com.sina。

try {
URL url=new URL("
String host=url

Answer 3

你看域名解析是什么的。top