1.导入hutool的maven依赖

 <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.8.16</version>
        </dependency>

2.直接复制一下代码运行

import cn.hutool.core.lang.Validator;
public class Test {
    public static void main(String[] args) throws Exception{

        String email = "1234@qq.com";
        String email2 = "1234@qq";
        if (Validator.isEmail(email)) {
            System.out.println(email+"邮箱地址正确");
        }else {
            System.out.println(email+"邮箱地址有误");
        }

        if (Validator.isEmail(email2)) {
            System.out.println(email+"邮箱地址正确");
        }else {
            System.out.println(email2+"邮箱地址有误");
        }

    }
}