1.更新IM群聊消息发送失败

mec-im/src/main/java/com/ym/controller/GroupController.java

@@ -137,7 +137,7 @@ public class GroupController{
             if (TencentCloudImPlugin.PLUGIN_NAME.equals(imPluginContext.defaultService())) {
                 // 腾讯云消息
                 for (String groupId : integers) {
-                    MessageWrapper.GroupMessage groupMessage = JSON.parseObject(build.groupId(groupId).toString(),
+                    MessageWrapper.GroupMessage groupMessage = JSON.parseObject(JSON.toJSONString(build.groupId(groupId)),
                         MessageWrapper.GroupMessage.class);
                     Boolean ret = imPluginContext.getPluginService().sendGroupMessage(groupMessage);
                     log.info("batchSendPrivateMessage GROUP tencentCloud senderId={}, ret={}, message={}", build.getSenderId(), ret, JSON.toJSONString(groupMessage));