Update QueueEnum.java

mall-portal/src/main/java/com/macro/mall/portal/domain/QueueEnum.java

@@ -20,15 +20,15 @@ public enum QueueEnum {
     /**
      * 交换名称
      */
-    private String exchange;
+    private final String exchange;
     /**
      * 队列名称
      */
-    private String name;
+    private final String name;
     /**
      * 路由键
      */
-    private String routeKey;
+    private final String routeKey;
 
     QueueEnum(String exchange, String name, String routeKey) {
         this.exchange = exchange;