fix:解决会话列表UnsupportedOperationException的问题

mallchat-common/src/main/java/com/abin/mallchat/common/common/utils/AssertUtil.java

@@ -47,6 +47,13 @@ public class AssertUtil {
         }
     }
 
+    //如果不是非空对象，则抛异常
+    public static void isNotEmpty(Object obj, ErrorEnum errorEnum, Object... args) {
+        if (isEmpty(obj)) {
+            throwException(errorEnum, args);
+        }
+    }
+
     //如果不是非空对象，则抛异常
     public static void isEmpty(Object obj, String msg) {
         if (!isEmpty(obj)) {