springboot+mybatis完成简单注册登录功能

package com.alibaba.service; import com.alibaba.bean.Result; import com.alibaba.bean.User; import com.alibaba.mapper.UserMapper; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; @Service @Transactional(rollbackFor = RuntimeException.class) public class UserService { @Autowired private UserMapper userMapper; /** * 注册 * @param user 参数封装 * @return Result */ public Result regist(User user) { Result result = new Result(); result.setSuccess(false); result.setDetail(null); try { User existUser = userMapper.findUserByName(user.getUsername()); if(existUser != null){ //如果用户名已存在 result.setMsg("用户名已存在"); }else{ userMapper.regist(user); //System.out.println(user.getId()); result.setMsg("注册成功"); result.setSuccess(true); result.setDetail(user); } } catch (Exception e) { result.setMsg(e.getMessage()); e.printStackTrace(); } return result; } /** * 登录 * @param user 用户名和密码 * @return Result */ public Result login(User user) { Result result = new Result(); result.setSuccess(false); result.setDetail(null); try { Long userId= userMapper.login(user); if(userId == null){ result.setMsg("用户名或密码错误"); }else{ result.setMsg("登录成功"); result.setSuccess(true); user.setId(userId); result.setDetail(user); } } catch (Exception e) { result.setMsg(e.getMessage()); e.printStackTrace(); } return result; } }