<dependency>

            <groupId>org.springframework.security</groupId>

            <artifactId>spring-security-core</artifactId>

        </dependency>

    @Test

    public void password() {

        String pass = "admin123";

        BCryptPasswordEncoder bcryptPasswordEncoder = new BCryptPasswordEncoder();

        String hashPass = bcryptPasswordEncoder.encode(pass);

        System.out.println(hashPass);

        hashPass = "$2a$10$7JB720yubVSZvUI0rEqK/.VqGOZTH.ulu33dHOiBE8ByOhJIrdAu2";

        boolean flag = bcryptPasswordEncoder.matches("admin123", hashPass);

        System.out.println(flag);

    }