异常总结系列 | java.lang.IllegalArgumentException: There is no PasswordEncoder mapped for the id “null”

异常

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

描述:

要求我们提供一个密码编码器

PS:

有些版本不要求这样子做,所以就不会有该问题的发生,
我现在用的是5.0版本,强制要求提供一个,所以我们就给一个PasswordEncoder给他.
我们也可以使用Spring自带的PasswordEncoder.为了方便起见,我们以明文形式存密码在后台,故使用自定义PasswordEncoder

自定义PasswordEncoder

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

public class MyPasswordEncoder implements PasswordEncoder {

    @Override
    public String encode(CharSequence arg0) {
        return arg0.toString();
    }

    @Override
    public boolean matches(CharSequence arg0, String arg1) {
        return arg1.equals(arg0.toString());
    }

}

应用自定义编码器

@Configuration
@EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

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

        auth
          .inMemoryAuthentication()
          .passwordEncoder(new MyPasswordEncoder())//在此处应用自定义PasswordEncoder
          .withUser("user")
          .password("password")
          .roles("USER");
    }
}


自带编码器

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

别忘了在注册用户的地方添加编码器加密

例如:

@PostMapping("/register")
    public String doRegister(UserEntity userEntity){
        // 此处省略校验逻辑
    	PasswordEncoder passwordEncoder = new BCryptPasswordEncoder();
    	String password = passwordEncoder.encode(userEntity.getPassword());
    	userEntity.setPassword(password);
        if (userService.insert(userEntity))
            return "redirect:register?success";
        return "redirect:register?error";
    }






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转载自blog.csdn.net/michael_hm/article/details/79913542