这次我们主要讲一下后端代码

用户实体类

@Entity
@Data
@Builder
public class SysUser {
    @Id
    @GeneratedValue
    private Integer userId;
    @Column(nullable = false)
    private String email;
    @Column(nullable = false)
    private String password;
    private String nickname;
    private String avatar;
    private String description;
    private Integer wordsCount;
    private Integer likeCount;

}

• Respository

public interface SysUserRepositry extends JpaRepository<SysUser, Integer> {
    /**
     * 根据邮箱查找用户
     * @param email
     * @return
     */
    SysUser findSysUserByEmail(String email);

    /**
     * 根据热度降序排列
     * JPQL语句
     * @return
     */
    @Query("FROM SysUser  u ORDER BY u.likeCount DESC ")
    List<SysUser> findHotUsers();
}

Service及其实现类

public interface SysUserService {
    ResponseUtil userLogin(LoginUser loginUser);

    List<SysUser> getHotUsers();
}

@Service
public class SysUserServiceImpl implements SysUserService {
    @Resource
    private SysUserRepositry sysUserRepositry;

    @Override
    public ResponseUtil userLogin(LoginUser loginUser) {
        SysUser sysUser = sysUserRepositry.findSysUserByEmail(loginUser.getEmail());
        //邮箱有效
        if (sysUser != null) {
            //判断密码是否正确
            if (loginUser.getPassword().equals(sysUser.getPassword())) {
                return new ResponseUtil(0, "login success", sysUser);
            } else {
                return new ResponseUtil(0, "password wrong");
            }
        } else {
            return new ResponseUtil(0, "email wrong");
        }
    }

    @Override
    public List<SysUser> getHotUsers() {
        return sysUserRepositry.findHotUsers();
    }
}

• Controller层

@RestController
@RequestMapping("/user")
@CrossOrigin("http://localhost")
public class SysUserController {
    @Resource
    private SysUserService sysUserService;

    @RequestMapping(value = "/sign_in", method = RequestMethod.POST)
    public ResponseUtil signIn(@RequestBody LoginUser loginUser) {
        System.out.println(loginUser);
        return sysUserService.userLogin(loginUser);
    }

    @RequestMapping(value = "/hot", method = RequestMethod.GET)
    public ResponseUtil getHotUsers() {
        return new ResponseUtil(0, "get hot users!", sysUserService.getHotUsers());
    }

}

更多代码请见我GitHub

https://github.com/1094064939/JianshuBackEnd