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

問題描述：

使用springboot，權限管理使用spring security，使用內存用戶驗證，但無響應報錯：

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

解決方式

①：

創建MyPasswordEncoder類實現PasswordEncoder，加注解  @Component

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

    @Override
    public boolean matches(CharSequence charSequence, String s) {
        return s.equals(charSequence.toString());
    }
}

 

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        //如果程序報錯There is no PasswordEncoder mapped for the id "null"，就將該段注釋添加下邊代碼
        //或者在MyPasswordEncoder類上加一個@Component注解,使它成為一個Bean
        auth.inMemoryAuthentication().withUser("admin").password("123456").authorities("ADMIN_ADD","ADMIN_FIND");//自定義登錄用戶用戶名和密碼並賦予一些權限
    }

②：

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        

        //這個是使用了匿名內部類
        auth.inMemoryAuthentication().passwordEncoder(new MyPasswordEncoder()).withUser("lxy").password("lxy").authorities("ADMIN_ADD","ADMIN_FIND");
    }