springboot用户登陆密码两次md5加密

1.用户端:PASS = MD5(明文 + 固定salt)

2.服务端:PASS = MD5(用户输入 + 随机salt)

引入依赖包

<dependency>
            <groupId>commons-codec</groupId>
            <artifactId>commons-codec</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.8.1</version>
        </dependency>