SpringSecurity中的UserDetails和UserDetailsService接口详解

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.security.mysql.dao.UserDao;
import com.security.mysql.entity.UserEntity;
import com.security.user.UserDetailsInfo;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;


@Component
@Slf4j
public class UserDetailsServiceImpl implements UserDetailsService {

	// TODO 这里改成你自己的服务或者Dao查询
    @Autowired
    private UserDao userDao;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        log.info("进入 loadUserByUsername ...");
        // TODO 查询系统内的用户
        LambdaQueryWrapper<UserEntity> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(UserEntity::getUsername, username);
        UserEntity userEntity = userDao.selectOne(wrapper);
        if (userEntity == null) {
            // 未查询到用户
            throw new RuntimeException("not find user");
        }

		// TODO 封装成实现了 UserDetails 接口的实体类模型
        return UserDetailsInfo.builder()
                .id(userEntity.getId())
                .username(userEntity.getUsername())
                .password(userEntity.getPassword())
                .build();
    }

}