Java常用正则表达式例子

java api1.6正则表达式说明:java.util.regex

1.java中用正则表达式判断字符串是否数字

import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Test {
	public static void main(String[] args) {
		 String str="4566";
		 Pattern pattern = Pattern.compile("[0-9]*");
         Matcher isNum = pattern.matcher(str);
         //str是数字返回true
         System.out.println(isNum.matches());
         
         //str不为数字返回false
         str="fdsfds33";
         isNum = pattern.matcher(str);
         System.out.println(isNum.matches());
	}
}

2..java正则验证IP地址

import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Test {
	public static void main(String[] args) {
		 //正则ip通配符
		 String tph="\\b((?!\\d\\d\\d)\\d+|1\\d\\d|2[0-4]\\d|25[0-5])\\.((?!\\d\\d\\d)\\d+|1\\d\\d|2[0-4]\\d|25[0-5])\\.((?!\\d\\d\\d)\\d+|1\\d\\d|2[0-4]\\d|25[0-5])\\.((?!\\d\\d\\d)\\d+|1\\d\\d|2[0-4]\\d|25[0-5])\\b";
		 Pattern pattern = Pattern.compile(tph);
         
         //str是错误IP返回true
         String str="192.168.1.48";
         Matcher isNum = pattern.matcher(str);
         System.out.println(isNum.matches());
         
         //str是错误IP返回false
         str="127.400.600.2";
         isNum = pattern.matcher(str);
         System.out.println(isNum.matches());
	}
}

3. java验证日期时间，解决润月：

import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Test {
	public static void main(String[] args) {
		 //正则日期通配符
		 String tph="^((\\d{2}(([02468][048])|([13579][26]))[\\-\\/\\s]?((((0?[13578])|(1[02]))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])))))|(\\d{2}(([02468][1235679])|([13579][01345789]))[\\-\\/\\s]?((((0?[13578])|(1[02]))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\\-\\/\\s]?((0?[1-9])|(1[0-9])|(2[0-8]))))))(\\s(((0?[0-9])|([1-2][0-3]))\\:([0-5]?[0-9])((\\s)|(\\:([0-5]?[0-9])))))?$";
		 Pattern pattern = Pattern.compile(tph);
         
         //java验证日期时间，解决润月
         String str="2000-02-29 23:59:59";
         Matcher isNum = pattern.matcher(str);
         System.out.println(isNum.matches());
	}
}

4.java验证邮箱格式：

import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Test {
	public static void main(String[] args) {
		 //正则邮箱通配符
		 String tph="^([a-zA-Z0-9_\\-\\.]+)@((\\[[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.)|(([a-zA-Z0-9\\-]+\\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\\]?)$";
		 Pattern pattern = Pattern.compile(tph);
         
         //java验证邮箱格式
         String str="a@aa.com";
         Matcher isNum = pattern.matcher(str);
         System.out.println(isNum.matches());
	}
}

5.java验证手机号码

import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Test {
	public static void main(String[] args) {
		 //正则手机号码通配符
		 String tph="^((13[0-9])|(15[^4,\\D])|(18[0,5-9]))\\d{8}$";
		 Pattern pattern = Pattern.compile(tph);
         
         //java验证手机号码格式
         String str="13693347897";
         Matcher isNum = pattern.matcher(str);
         System.out.println(isNum.matches());
	}
}