update

mec-im/src/main/java/com/ym/pojo/CustomMessage.java

@@ -1,6 +1,7 @@
 package com.ym.pojo;
 
 import io.rong.messages.BaseMessage;
+import org.apache.commons.lang3.StringUtils;
 
 public class CustomMessage extends BaseMessage {
     private Boolean enable;
@@ -50,7 +51,7 @@ public class CustomMessage extends BaseMessage {
         return "{\"enable\":" + enable +
                 ", \"customType\":" + customType +
                 ", \"rate\":" + rate +
-                ", \"userId\":" + userId +
+                ", \"userId\":" + (StringUtils.isEmpty(userId)?"\"\"":userId) +
                 '}';
     }
 }