一个严格区配IP的正则表达式

package com.autonavi.regex;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class TestRegex {
public static boolean isIP(String ip) {
String ipRegex = "(25[0-5]|2[0-4]\\d|1\\d{2}|[1-9][0-9]|[0-9])\\.(25[0-5]|2[0-4]\\d|1\\d{2}|[1-9][0-9]|[0-9])\\.(25[0-5]|2[0-4]\\d|1\\d{2}|[1-9][0-9]|[0-9])\\.(25[0-5]|2[0-4]\\d|1\\d{2}|[1-9][0-9]|[0-9])";
Pattern pattern = Pattern.compile(ipRegex);
Matcher matcher = pattern.matcher(ip);
return matcher.matches();
}

public static void main(String[] args) {
//true,正常,应该true
String ip1 = "192.168.1.1";
if(isIP(ip1)) {
System.out.println("IP1正确！");
} else {
System.out.println("IP1无效！");
}

//true，正常,应该true
String ip2 = "255.255.255.255";
if(isIP(ip2)) {
System.out.println("IP2正确！");
} else {
System.out.println("IP2无效！");
}

//false，正常,应该false
String ip3 = "256.168.1.1";
if(isIP(ip3)) {
System.out.println("IP3正确！");
} else {
System.out.println("IP3无效！");
}

//true，正常,应该true
String ip4 = "0.168.1.1";
if(isIP(ip4)) {
System.out.println("IP4正确！");
} else {
System.out.println("IP4无效！");
}

//true,异常,应该false
String ip5 = "00.168.1.1";
if(isIP(ip5)) {
System.out.println("IP5正确！");
} else {
System.out.println("IP5无效！");
}

//false,正常,应该false
String ip6 = "000.168.1.1";
if(isIP(ip6)) {
System.out.println("IP6正确！");
} else {
System.out.println("IP6无效！");
}

//true，异常,应该false
String ip7 = "01.100.100.100";
if(isIP(ip7)) {
System.out.println("IP7正确！");
} else {
System.out.println("IP7无效！");
}

//false,正常,,应该false
String ip8 = "001.100.100.100";
if(isIP(ip8)) {
System.out.println("IP8正确！");
} else {
System.out.println("IP8无效！");
}

//false,正常,应该false
String ip9 = "010.100.100.100";
if(isIP(ip9)) {
System.out.println("IP9正确！");
} else {
System.out.println("IP9无效！");
}

//false,正常,应该false
String ip10 = "-10.100.100.100";
if(isIP(ip10)) {
System.out.println("IP10正确！");
} else {
System.out.println("IP10无效！");
}

}
}

IP1正确！
IP2正确！
IP3无效！
IP4正确！
IP5无效！
IP6无效！
IP7无效！
IP8无效！
IP9无效！
IP10无效！