需求：

        校验手机号码，邮箱，电话号码

实现代码：

package apilambda.d6_regex;import java.util.Scanner;public class RegexTest2 {public static void main(String[] args) {//需求：校验手机号码，邮箱，电话号码//验证手机号checkPhone();//验证邮箱checkEmail();//验证电话号码checkTel();}//验证电话号码public static void checkTel(){Scanner sc=new Scanner(System.in);while (true) {System.out.println("请输入您的电话号码：");String tel=sc.next();//校验手机号（正则表达式）if (tel.matches("0\\d{2,6}-?\\d{5,20}")) {System.out.println("验证正确！！！");return;}else {System.out.println("验证错误！！！");}}}//验证邮箱public static void checkEmail(){Scanner sc=new Scanner(System.in);while (true) {System.out.println("请输入您的邮箱：");String email=sc.next();//校验手机号（正则表达式）if (email.matches("\\w{1,30}@[a-zA-Z0-9]{2,20}(\\.[a-zA-Z0-9]{2,20}){1,2}")) {System.out.println("验证正确！！！");return;}else {System.out.println("验证错误！！！");}}}//验证手机号public static void checkPhone(){Scanner sc=new Scanner(System.in);while (true) {System.out.println("请输入您的手机号：");String phone=sc.next();//校验手机号（正则表达式）if (phone.matches("1[3-9]\\d{9}")) {System.out.println("验证正确！！！");return;}else {System.out.println("验证错误！！！");}}}
}

运行截图：