4dkankan-agent/src/main/java/com/fdkankan/agent/service/impl/UserServiceImpl.java

package com.fdkankan.agent.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.fdkankan.agent.entity.User;
import com.fdkankan.agent.mapper.IUserMapper;
import com.fdkankan.agent.service.IUserService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * <p>
 * 用户信息表 服务实现类
 * </p>
 *
 * @author 
 * @since 2022-11-09
 */
@Service
public class UserServiceImpl extends ServiceImpl<IUserMapper, User> implements IUserService {

    @Override
    public Boolean checkUserName(String userName) {
        User user =  this.getByUserName(userName);
        if(user == null ){
            return false;
        }
        return true;
    }

    @Override
    public User getByUserName(String userName) {
        LambdaQueryWrapper<User> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(User::getUserName,userName);
        List<User> list = this.list(wrapper);
        if(list == null || list.size() <=0){
            return null;
        }
        return  list.get(0);
    }
}