小程序获取sessionId

ruoyi-admin/src/main/resources/application-druid.yml

@@ -51,6 +51,8 @@ wechat:
     merchantSerialNumber: 微信支付密钥对应的序列号
     apiV3key: 微信支付apiV3key
     notifyUrl: 微信支付回调地址
+    miniProgramAppId: 小程序apppid
+    miniProgramSecret:
 sms:
   enabled: true
   # 阿里云 dysmsapi.aliyuncs.com

ruoyi-common/src/main/java/com/ruoyi/common/core/domain/AjaxResult.java

@@ -77,6 +77,10 @@ public class AjaxResult extends HashMap<String, Object>
     {
         return AjaxResult.success("操作成功", data);
     }
+    public static AjaxResult successData(Object data)
+    {
+        return AjaxResult.success("操作成功", data);
+    }
 
     /**
      * 返回成功消息

ruoyi-mall/src/main/java/com/cyl/h5/controller/WechatController2.java

@@ -1,13 +1,19 @@
 package com.cyl.h5.controller;
 
+import com.alibaba.fastjson.JSON;
+import com.alibaba.fastjson.JSONObject;
 import com.cyl.external.WechatUtil;
 import com.cyl.h5.pojo.vo.form.WechatLoginForm;
 import com.cyl.manager.ums.service.MemberWechatService;
+import com.ruoyi.common.core.domain.AjaxResult;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.ResponseEntity;
+import org.springframework.util.Base64Utils;
 import org.springframework.web.bind.annotation.*;
 
 import javax.servlet.http.HttpServletRequest;
+import java.util.HashMap;
+import java.util.Map;
 
 /**
  * h5/微信
@@ -41,4 +47,19 @@ public class WechatController2 {
         String token = memberWechatService.login(form);
         return ResponseEntity.ok("{\"data\": \"" + token + "\"}");
     }
+
+
+    @GetMapping("/no-auth/wechat/getSessionId")
+    public AjaxResult getSessionId(String code) {
+        JSONObject object = memberWechatService.getSessionId(code);
+        if (object != null) {
+            String openId = object.getString("openid");
+            String sessionId = object.getString("session_key");
+            Map map = new HashMap();
+            map.put("openId", openId);
+            map.put("sessionId", sessionId);
+            return AjaxResult.successData(Base64Utils.encodeToString(JSON.toJSONString(map).getBytes()));
+        }
+        return AjaxResult.success(null);
+    }
 }

ruoyi-mall/src/main/java/com/cyl/manager/ums/service/MemberWechatService.java

@@ -6,13 +6,16 @@ import java.util.List;
 
 import cn.hutool.core.util.RandomUtil;
 import cn.hutool.core.util.StrUtil;
+import com.alibaba.fastjson.JSONObject;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
+import com.cyl.config.WechatConfig;
 import com.cyl.external.WechatUtil;
 import com.cyl.external.resp.AccessTokenResp;
 import com.cyl.external.resp.UserInfoResp;
 import com.cyl.h5.pojo.vo.form.WechatLoginForm;
 import com.cyl.manager.ums.convert.MemberWechatConvert;
+import com.cyl.wechat.WechatPayData;
 import com.github.pagehelper.PageHelper;
 import com.ruoyi.common.core.domain.entity.SysUser;
 import com.ruoyi.common.core.domain.model.ExtraUserBody;
@@ -23,10 +26,12 @@ import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.domain.Pageable;
 import org.apache.commons.lang3.StringUtils;
+import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Service;
 import com.cyl.manager.ums.mapper.MemberWechatMapper;
 import com.cyl.manager.ums.domain.MemberWechat;
 import com.cyl.manager.ums.pojo.query.MemberWechatQuery;
+import org.springframework.web.client.RestTemplate;
 
 /**
  * 用户微信信息Service业务层处理
@@ -47,6 +52,10 @@ public class MemberWechatService {
     private ISysUserService userService;
     @Autowired
     private SysLoginService loginService;
+    @Autowired
+    private RestTemplate restTemplate;
+    private static String LOGIN_URL = "https://api.weixin.qq.com/sns/jscode2session?appid=#{APPID}&secret=#{SECRET}&js_code=#{JSCODE}&grant_type=authorization_code";
+
 
     /**
      * 查询用户微信信息
@@ -203,4 +212,22 @@ public class MemberWechatService {
         // 4. 生成token
         return loginService.createToken(u);
     }
+
+    public JSONObject getSessionId(String code) {
+        String url = LOGIN_URL.replace("#{APPID}", WechatPayData.miniProgramAppId)
+                .replace("#{SECRET}", WechatPayData.miniProgramSecret)
+                .replace("#{JSCODE}", code);
+        log.info("获取openid，url：{}", url);
+        try {
+            ResponseEntity<String> res = restTemplate.getForEntity(url, String.class);
+            String body = res.getBody();
+            if (com.ruoyi.common.utils.StringUtils.isEmpty(body)) {
+                throw new Exception("获取openid出错");
+            }
+            return JSONObject.parseObject(body);
+        } catch (Exception e) {
+            log.error("获取openid报错", e);
+            return null;
+        }
+    }
 }

ruoyi-mall/src/main/java/com/cyl/wechat/WechatPayData.java

@@ -21,6 +21,9 @@ public class WechatPayData {
     public static String apiV3key;
     public static String notifyUrl;
 
+    public static String miniProgramAppId;
+    public static String miniProgramSecret;
+
     public void setAppId(String appId) {
         WechatPayData.appId = appId;
     }
@@ -48,4 +51,12 @@ public class WechatPayData {
     public void setNotifyUrl(String notifyUrl) {
         WechatPayData.notifyUrl = notifyUrl;
     }
+
+    public void setMiniProgramAppId(String miniProgramAppId) {
+        WechatPayData.miniProgramAppId = miniProgramAppId;
+    }
+
+    public void setMiniProgramSecret(String miniProgramSecret) {
+        WechatPayData.miniProgramSecret = miniProgramSecret;
+    }
 }