正则表达式
IP正则表达式
^(([1-9]|([1-9]\d)|(1\d\d)|(2([0-4]\d|5[0-5]))).)(([1-9]|([1-9]\d)|(1\d\d)|(2([0-4]\d|5[0-5]))).){2}([1-9]|([1-9]\d)|(1\d\d)|(2([0-4]\d|5[0-5])))$
事例
public static void main(String[] args) {
String ipReg = "^(([1-9]|([1-9]\\d)|(1\\d\\d)|(2([0-4]\\d|5[0-5])))\\.)(([1-9]|([1-9]\\d)|(1\\d\\d)|(2([0-4]\\d|5[0-5])))\\.){2}([1-9]|([1-9]\\d)|(1\\d\\d)|(2([0-4]\\d|5[0-5])))$";// ip的正则表达式
Pattern ipPattern = Pattern.compile(ipReg);
boolean flag = ipPattern.matcher("11.11.11.11").matches();
System.out.println(flag);
flag = ipPattern.matcher("11.11.11.1111").matches();
System.out.println(flag);
}
运行结果
true
false
| 
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