微头条 来的技术用ssm和springboot

package com.atguigu.service.impl; import com.alibaba.druid.util.StringUtils; import com.atguigu.utlis.*; import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper; import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl; import com.atguigu.pojo.User; import com.atguigu.service.UserService; import com.atguigu.mapper.UserMapper; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.HashMap; import java.util.Map; /** * @author 35251 * @description 针对表【news_user】的数据库操作Service实现 * @createDate 2024-02-21 16:05:50 */ @Service public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService{ @Autowired private UserMapper userMapper; @Autowired private JwtHelper jwtHelper; /** * 登录业务 * 1.根据账号，查询用户对象 - LoginUser * 2.如果账号为空 ， 查询为失败，账号错误！！！501 * 3.对比，密码，失败返回503的错误 * 4.根据用户id生成一个token，token->result 返回 */ @Override public Result login(User user) { //根据账号查询数据 LambdaQueryWrapper<User> lambdaQueryWrapper=new LambdaQueryWrapper<>(); lambdaQueryWrapper.eq(User::getUsername,user.getUsername()); User loginUser = userMapper.selectOne(lambdaQueryWrapper); if (loginUser == null) { return Result.build(null,ResultCodeEnum.USERNAME_ERROR); } //对比密码 if (!StringUtils.isEmpty(user.getUserPwd()) && MD5Util.encrypt(user.getUserPwd()).equals(loginUser.getUserPwd())){ //登录成功 //根据用户 id生成 token String token = jwtHelper.createToken(Long.valueOf((loginUser.getUid()))); //将token封装到result返回 Map data=new HashMap(); data.put("token",token); return Result.ok(data); } //密码错误 return Result.build(null,ResultCodeEnum.PASSWORD_ERROR); } /** * 根据token获取用户数据 * 1. token是否在有有效性 * 2.根据token解析userid * 3.根据用户id查询数据 * 4.去掉密码，封装result结果返回即可 * * */ @Override public Result getUserInfo(String token) { //是否过期 boolean expiration = jwtHelper.isExpiration(token); if (expiration) { //失效密码，未登录看待 return Result.build(null,ResultCodeEnum.NOTLOGIN); } int userId = jwtHelper.getUserId(token).intValue(); User user = userMapper.selectById(userId); user.setUserPwd(""); Map map=new HashMap(); map.put("loginUser",user); return Result.ok(map); } /** * 检查账号是否可用 * 1.检查账号进行 count查询 * 2.count == 0 可用 * 3.count >0 不可用 * */ @Override public Result checkUserName(String username) { LambdaQueryWrapper<User> queryWrapper=new LambdaQueryWrapper<>(); queryWrapper.eq(User::getUsername,username); Long count = userMapper.selectCount(queryWrapper); //如果没有直接添加 if (count==0) { return Result.ok(null); } //有账号报错505 return Result.build(null,ResultCodeEnum.USERNAME_USED); } /** * 注册业务 * 1.依然检查账号是否已经被注册 * 2.密码加密处理 * 3.账号数据保存 * 4.返回结果 * */ @Override public Result regist(User user) { LambdaQueryWrapper<User> queryWrapper=new LambdaQueryWrapper<>(); queryWrapper.eq(User::getUsername,user.getUsername()); Long count = userMapper.selectCount(queryWrapper); //如果有就报错，防止同时注册的情况 if (count > 0) { return Result.build(null,ResultCodeEnum.USERNAME_USED); } //如果没有注册就直接注册 user.setUserPwd(MD5Util.encrypt(user.getUserPwd())); userMapper.insert(user); return Result.ok(null); } }