学习笔记（十一）微信

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学习笔记（十一）微信

2023-07-04 10:29| 来源: 网络整理| 查看: 265

最近在学习微信方面的开发，首先记录一下获取openid的实现。

前言

针对微信公众号获取用户openid，首先阅读微信的官方文档：网页授权 | 微信开放文档

一、需求

微信用户进入小程序后，点击授权，获取用户的openid并存入数据库。

二、思路

1、获取微信用户code

2、根据微信用户的code获取openid和用户信息

3、将信息存入数据库

三、实现

1、util类

import com.alibaba.fastjson.JSONObject; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.clienthods.HttpGet; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.util.EntityUtils; import java.io.IOException; public class HttpClientUtils { /** * 发起一个GET请求, 返回数据是以JSON格式返回 * @param url * @return * @throws IOException */ public static JSONObject doGet(String url) throws IOException { JSONObject jsonObject = null; CloseableHttpClient client = HttpClients.createDefault(); HttpGet httpGet = new HttpGet(url); HttpResponse response = client.execute(httpGet); HttpEntity entity = response.getEntity(); if (entity != null) { String result = EntityUtils.toString(entity, "UTF-8"); jsonObject = JSONObject.parseObject(result); } httpGet.releaseConnection(); return jsonObject; } }

2、entity类

先在数据库中新建一个用来存放微信用户信息的表。

import com.baomidou.mybatisplus.annotation.TableId; import com.baomidou.mybatisplus.annotation.TableName; import io.swagger.annotations.ApiModel; import lombok.Data; import lombok.EqualsAndHashCode; import lombok.experimental.Accessors; import java.util.Date; @Data @TableName("wechat_user") @EqualsAndHashCode(callSuper = false) @Accessors(chain = true) @ApiModel(value="wechat_user对象", description="用户区划信息") public class WechatUser{ /**用户唯一标识*/ @TableId private String openid; /**昵称*/ private String nickName; /**性别*/ private Integer sex; /**国家*/ private String country; /**省份*/ private String province; /**城市*/ private String city; /**头像*/ private String headImgUrl; /**订阅*/ private String subscribe; /**类型*/ private Integer type; /**手机号*/ private String phone; /**createTime*/ private Date createTime; /**updateTime*/ private Date updateTime; }

3、mapper类

import com.baomidou.mybatisplus.core.mapper.BaseMapper; import org.apache.ibatis.annotations.Update; import org.jeecg.modules.wechat.entity.WechatUser; public interface WechatUserMapper extends BaseMapper { //根据openid更新用户信息 @Update("update wechat_user set nick_name = #{nickName}, head_img_url = #{headImgUrl}, phone = #{phone},sex = #{sex},update_time = now() where openid = #{openid}") int updateUser(WechatUser userEntity); }

4、service及serviceImpl类

import com.baomidou.mybatisplus.extension.service.IService; import org.jeecg.modules.wechat.entity.WechatUser; public interface IWechatUserService extends IService { //根据openid更新用户信息 int updateUser(WechatUser userEntity); } import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl; import org.jeecg.modules.wechat.entity.WechatUser; import org.jeecg.modules.wechat.mapper.WechatUserMapper; import org.jeecg.modules.wechat.service.IWechatUserService; import org.springframework.stereotype.Service; import javax.annotation.Resource; @Service public class WechatUserServiceImpl extends ServiceImpl implements IWechatUserService { @Resource private WechatUserMapper mapper; //根据openid更新用户信息 @Override public int updateUser(WechatUser userEntity) { return mapper.updateUser(userEntity); } }

5、controller类

import com.alibaba.fastjson.JSONObject; import io.swagger.annotations.Api; import io.swagger.annotations.ApiOperation; import lombok.RequiredArgsConstructor; import lombok.extern.slf4j.Slf4j; import org.jeecg.common.api.vo.Result; import org.jeecg.modules.wechat.entity.WechatUser; import org.jeecg.modules.wechat.service.IWechatUserService; import org.jeecg.modules.wechat.util.HttpClientUtils; import org.springframework.ui.ModelMap; import org.springframework.web.bind.annotation.*; import java.io.*; @Slf4j @RequiredArgsConstructor @Api(tags = "微信接口") @RestController @RequestMapping(value = "/wx") public class WechatController { final IWechatUserService wechatUserService; @ApiOperation("获取微信用户code") @GetMapping("/wxlogin") public String wxlogin() { String appid = "你的公众号appid"; String http = "小程序路径"; // 第一步：用户同意授权，获取code String url = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=" + appid + "&redirect_uri=" + http + "&response_type=code" + "&scope=snsapi_userinfo" + "&state=STATE#wechat_redirect"; System.out.println("url:"+url); return url; } @ApiOperation("根据微信用户code获取openid和用户信息") @GetMapping("/wxcallback") public Result wxcallback(String code, ModelMap map) throws IOException { String appid = "你的公众号openid"; String appsecret = "你的公众号secret"; // 第二步：通过code换取网页授权access_token String url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=" + appid + "&secret=" + appsecret + "&code=" + code + "&grant_type=authorization_code"; JSONObject jsonObject = HttpClientUtils.doGet(url); String openid = jsonObject.getString("openid"); String access_Token = jsonObject.getString("access_token"); System.out.println("jsonObject:"+jsonObject); // 第四步：拉取用户信息(需scope为 snsapi_userinfo) url = "https://api.weixin.qq.com/sns/userinfo?access_token=" + access_Token + "&openid=" + openid + "&lang=zh_CN"; JSONObject userInfoJson = HttpClientUtils.doGet(url); System.out.println("UserInfo:" + userInfoJson); // 2种情况: 我们是有账号体系的，微信帐号做来一个关联，来关联我们的账号体系 WechatUser userEntity = wechatUserService.getById(openid); if (userEntity == null) { //用户信息存入数据库 userEntity = new WechatUser(); userEntity.setType(0); userEntity.setOpenid(openid); userEntity.setSex((Integer) userInfoJson.get("sex")); userEntity.setNickName((String)userInfoJson.get("nick_name")); userEntity.setHeadImgUrl((String)userInfoJson.get("head_img_url")); userEntity.setCountry((String)userInfoJson.get("country")); userEntity.setProvince((String)userInfoJson.get("province")); userEntity.setCity((String)userInfoJson.get("city")); userEntity.setSubscribe((String)userInfoJson.get("subscribe")); userEntity.setPhone((String)userInfoJson.get("phone")); wechatUserService.save(userEntity); } else { //更新用户信息 userEntity.setNickName((String)userInfoJson.get("nickname")); userEntity.setHeadImgUrl((String)userInfoJson.get("headimgurl")); userEntity.setPhone((String)userInfoJson.get("phone")); userEntity.setSex((Integer) userInfoJson.get("sex")); wechatUserService.updateUser(userEntity); } return Result.OK(userInfoJson); } } 总结

1、首先根据微信官方文档内容，调用所需接口；

2、学习过程中参考了以下文章，写的很清楚，帮助我避免了很多问题，感谢！

链接：java获取微信用户信息（含源码，直接改下appid就可以使用了） - 炫意HTML5 (xyhtml5.com)

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学习笔记（十一）微信

学习笔记（十一）微信

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