spring security oauth2 0 报错java lang illegalargumentexception there is no passwordencoder mapped for the id null

---
title: "Spring Security Oauth2.0 报错java.lang.IllegalArgumentException: There is no PasswordEncoder mapped for the id \"null\""
date: 2019-01-07 16:55:46
categories: Spring Security
tags:
- 报错
- spring
- password
- security
- oauth2.0
- IllegalArgumentException
- PasswordEncoder
- mapped
---

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();
    }