java.lang.IllegalArgumentException: There is no PasswordEncoder mapped for the id "null"報錯

出現問題的原因：

　　內存用戶驗證時，Spring boot 2.0.1引用的security 依賴是 spring security 5.X版本，此版本需要提供一個PasswordEncorder的實例，否則后台匯報錯誤：
java.lang.IllegalArgumentException: There is no PasswordEncoder mapped for the id "null"
並且頁面毫無響應。

 

解決方法：

創建PasswordEncorder的實現類MyPasswordEncoder。

代碼一：

package com.mmall.demo;

import org.springframework.security.crypto.password.PasswordEncoder;

public class MyPasswordEncoder implements PasswordEncoder {
    @Override
    public String encode(CharSequence rawPassword) {
        return rawPassword.toString();
    }

    @Override
    public boolean matches(CharSequence rawPassword, String encodedPassword) {
        return encodedPassword.equals(rawPassword);
    }
}

代碼二：

 

package com.mmall.demo;

import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.builders.WebSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;

@Configuration
@EnableWebSecurity
public class SpringSecurityConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.inMemoryAuthentication().
                passwordEncoder(new MyPasswordEncoder()).
                withUser("admin").password("123456").roles("ADMIN");
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
       http.authorizeRequests()
               .antMatchers("/").permitAll()
               .anyRequest().authenticated()
               .and()
               .logout().permitAll()
               .and()
               .formLogin();
       http.csrf().disable();
    }

    @Override
    public void configure(WebSecurity web) throws Exception {
        web.ignoring().antMatchers("/js/**","/css/**","/image/**");
    }


}