:new: #1902 【企业微信】增加获取加入企业二维码的接口

weixin-java-cp/src/main/java/me/chanjar/weixin/cp/api/WxCpUserService.java

@@ -183,5 +183,20 @@ public interface WxCpUserService {
    */
   WxCpExternalContactInfo getExternalContact(String userId) throws WxErrorException;
 
-
+  /**
+   * <pre>
+   *
+   * 获取加入企业二维码。
+   *
+   * 请求方式：GET（HTTPS）
+   * 请求地址：https://qyapi.weixin.qq.com/cgi-bin/corp/get_join_qrcode?access_token=ACCESS_TOKEN&size_type=SIZE_TYPE
+   *
+   * 文档地址：https://work.weixin.qq.com/api/doc/90000/90135/91714
+   * </pre>
+   *
+   * @param sizeType qrcode尺寸类型，1: 171 x 171; 2: 399 x 399; 3: 741 x 741; 4: 2052 x 2052
+   * @return join_qrcode 二维码链接，有效期7天
+   * @throws WxErrorException .
+   */
+  String getJoinQrCode(int sizeType) throws WxErrorException;
 }

weixin-java-cp/src/main/java/me/chanjar/weixin/cp/api/impl/WxCpUserServiceImpl.java

@@ -1,7 +1,9 @@
 package me.chanjar.weixin.cp.api.impl;
 
 import com.google.common.collect.Maps;
-import com.google.gson.*;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonPrimitive;
 import com.google.gson.reflect.TypeToken;
 import lombok.RequiredArgsConstructor;
 import me.chanjar.weixin.common.error.WxErrorException;
@@ -198,4 +200,12 @@ public class WxCpUserServiceImpl implements WxCpUserService {
     String responseContent = this.mainService.get(url, null);
     return WxCpExternalContactInfo.fromJson(responseContent);
   }
+
+  @Override
+  public String getJoinQrCode(int sizeType) throws WxErrorException {
+    String url = this.mainService.getWxCpConfigStorage().getApiUrl(GET_JOIN_QR_CODE + sizeType);
+    String responseContent = this.mainService.get(url, null);
+    JsonObject tmpJson = GsonParser.parse(responseContent);
+    return tmpJson.get("join_qrcode").getAsString();
+  }
 }

weixin-java-cp/src/main/java/me/chanjar/weixin/cp/constant/WxCpApiPathConsts.java

@@ -161,6 +161,7 @@ public final class WxCpApiPathConsts {
     public static final String USER_CONVERT_TO_USERID = "/cgi-bin/user/convert_to_userid";
     public static final String GET_USER_ID = "/cgi-bin/user/getuserid";
     public static final String GET_EXTERNAL_CONTACT = "/cgi-bin/crm/get_external_contact?external_userid=";
+    public static final String GET_JOIN_QR_CODE = "/cgi-bin/corp/get_join_qrcode?size_type=";
   }
 
   @UtilityClass