springboot中实现微信登录功能

Controller层

package com.sky.controller.user;

import com.sky.constant.JwtClaimsConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.properties.JwtProperties;
import com.sky.result.Result;
import com.sky.service.UserService;
import com.sky.utils.JwtUtil;
import com.sky.vo.UserLoginVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.HashMap;
import java.util.Map;

@RestController
@RequestMapping("/user/user")
@Api(tags = "C端用户")
@Slf4j
public class UserController {
    @Autowired
    private UserService userService;
    @Autowired
    private JwtProperties jwtProperties;
    /**
     * 微信登录
     * @param userLoginDTO
     * @return
     */
    @PostMapping("/login")
    @ApiOperation("微信登录")
    public Result<UserLoginVO> login(@RequestBody UserLoginDTO userLoginDTO){
        log.info("微信用户登录{}",userLoginDTO.getCode());
        //微信登录
        User user = userService.wxlogin(userLoginDTO);
        //为微信用户生成JWT令牌
        Map<String, Object> claims=new HashMap<>();
        claims.put(JwtClaimsConstant.USER_ID,user);
        String token = JwtUtil.createJWT(jwtProperties.getUserSecretKey(), jwtProperties.getUserTtl(), claims);
        //返回VO数据
        UserLoginVO userLoginVO = new UserLoginVO();
        userLoginVO.setId(user.getId());
        userLoginVO.setOpenid(user.getOpenid());
        userLoginVO.setToken(token);
        log.info("end={}",userLoginVO);
        return Result.success(userLoginVO);
    }
}

service层

package com.sky.service;

import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Service;


public interface UserService {


    /**
     * 微信登录
     * @param userLoginDTO
     * @return
     */
    User wxlogin(UserLoginDTO userLoginDTO);


}

servicelmpl

package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.fasterxml.jackson.annotation.JsonFormat;
import com.google.gson.JsonObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.http.client.HttpClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;
@Service
@Slf4j
public class UserServicelmpl implements UserService {
    //微信服务接口地址,获取openid
    public static final String WX_LOGIN="https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;
    /**
     * 微信登录
     * @param userLoginDTO
     * @return
     */
    @Override
    public User wxlogin(UserLoginDTO userLoginDTO) {
        //调用微信接口服务
        Map<String, String> map= new  HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code", userLoginDTO.getCode());
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);
        log.info("获取到{}",json);

        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");

        //判断OPenId是否为空
        if (openid==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //当前用户是否为新用户
        User user = userMapper.getByOpenid(openid);
        //如果是新用户，自动完成注册

        if (user==null){
            User nuser=new User();
            nuser.setOpenid(openid);
            nuser.setCreateTime(LocalDateTime.now());
            userMapper.insert(nuser);
            return nuser;
        }
        //返回用户对象
        return user;
    }




}