Md5 util

        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-core</artifactId>
            <version>4.1.1.RELEASE</version>
        </dependency>

    @Test
    public void tt(){
        Md5PasswordEncoder md5 = new Md5PasswordEncoder();
        System.out.println(md5.encodePassword("123456", null));
    }