Spring Security 报：Encoded password does not look like BCrypt

/**
 * 配置用户身份的configure()方法
 *
 * @param auth
 * @throws Exception
 */
@Override
protected void configure(AuthenticationManagerBuilder auth) throws Exception {
    auth.userDetailsService(userDetailsService).passwordEncoder(new BCryptPasswordEncoder());
}

/**
 * 强散列哈希加密实现 
 * 必须 Bean 的形式实例化，否则会报 ：Encoded password does not look like BCrypt
 */
@Bean
public BCryptPasswordEncoder bCryptPasswordEncoder()
{
    return new BCryptPasswordEncoder();
}
/**
 * 配置用户身份的configure()方法
 *
 * @param auth
 * @throws Exception
 */
@Override
protected void configure(AuthenticationManagerBuilder auth) throws Exception {
    auth.userDetailsService(userDetailsService).passwordEncoder(bCryptPasswordEncoder());
}