Spring Security Oauth2.0 报错java.lang.IllegalArgumentException: There is no PasswordEncoder mapped for the id “null”

Spring Security Oauth2.0 报错java.lang.IllegalArgumentException: There is no PasswordEncoder mapped for the id "null"

原因：认证server里的auth.inMemoryAuthentication()里的密码不能直接写，需要加上BCryptPasswordEncoder的encode处理。修正后如下：

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
//        auth.parentAuthenticationManager(authenticationManager)
        auth.inMemoryAuthentication()
                .withUser("john").password(passwordEncoder().encode("123")).roles("USER");
    }

    @Bean
    public BCryptPasswordEncoder passwordEncoder(){
        return new BCryptPasswordEncoder();
    }