Error creating bean with name ‘userServiceImpl’: Unsatisfied dependency expressed through field ‘userMapper’;

项目架构

排查问题一:@Service,@Autowired没注入

UserServiceImpl

package com.song.travel.service.impl;
import com.song.travel.mapper.UserMapper;
import com.song.travel.pojo.User;
import com.song.travel.pojo.UserExample;
import com.song.travel.req.UserVo;
import com.song.travel.service.UserService;
import com.song.travel.utils.BeanConv;
import com.song.travel.utils.EmptyUtil;
import com.song.travel.utils.MD5Coder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.http.HttpSession;
import java.util.List;

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private UserMapper userMapper;

    @Autowired
     HttpSession session;
    /**
     * 用户注册:
     *      将请求携带的用户数据保存到数据库中
     * @param userVo
     * @return
     */
    @Override
    public Boolean registerUser(UserVo userVo) {
        // 将vo对象转成pojo对象
        // User user1 = BeanConv.toBean(userVo, new User());
        User user = BeanConv.toBean(userVo, User.class);
        // 对密码进行加密
        String md5Password = MD5Coder.md5Encode(user.getPassword());
        user.setPassword(md5Password);
        // dao层需要的pojo对象
        int i = userMapper.insertSelective(user);
        return i>0;
    }

    /**
     * 用户登录:
     *      根据用户名和密码查询用户表,查询到则登录成功
     *      查询不到则登录失败
     * @param userVo
     * @return
     */
    @Override
    public UserVo loginUser(UserVo userVo) {
        // 存放查询条件
        UserExample example = new UserExample();
        example.createCriteria()
                .andUsernameEqualTo(userVo.getUsername())
                .andPasswordEqualTo(MD5Coder.md5Encode(userVo.getPassword()));
        List<User> users = userMapper.selectByExample(example);
        UserVo userVoResult = new UserVo();
        if(users.size()>0){
            // 获取查询结果数据
            User user = users.get(0);
            // 对象转换
            BeanConv.toBean(user, userVoResult);
            // 登录成功后,保存登录成功的状态(将登录成功的用户信息保存到Session中)
            String id = session.getId();
            // 将存放用户对象的唯一标记(key),交个当前对象
            userVoResult.setSessionId(id);
            session.setAttribute(id,userVoResult);
        }
        return userVoResult;
    }

    /**
     * 退出操作
     *      将session中对应的对象删除
     */
    @Override
    public void loginOutUser() {
        //session.invalidate();
        String id = session.getId();
        session.removeAttribute(id);
    }

    /**
     * 判断用户是否登录
     * @return
     */
    @Override
    public Boolean isLogin() {
        // 从session中获取登录的用户信息
        Object userVo = session.getAttribute(session.getId());
        // 如果对象为空返回true,不为空返回false
        boolean flag = EmptyUtil.isNullOrEmpty(userVo);
        return !flag;
    }
}

问题二:dao层Mapper 未注入

问题三:扫包问题

问题四:SSM配置中Configuration未放入,需要加载入Spring

标签：UserServiceImpl,userVo,song,travel,SSM,session,import,注解,com
来源： https://blog.csdn.net/weixin_43390142/article/details/112910696