diff --git a/jero-boot/jero-boot-starter/jero-boot-starter-rabbitmq/src/main/java/com/jero/boot/starter/rabbitmq/exchange/DelayExchangeBuilder.java b/jero-boot/jero-boot-starter/jero-boot-starter-rabbitmq/src/main/java/com/jero/boot/starter/rabbitmq/exchange/DelayExchangeBuilder.java
index 6e06a204..6cd5b19b 100644
--- a/jero-boot/jero-boot-starter/jero-boot-starter-rabbitmq/src/main/java/com/jero/boot/starter/rabbitmq/exchange/DelayExchangeBuilder.java
+++ b/jero-boot/jero-boot-starter/jero-boot-starter-rabbitmq/src/main/java/com/jero/boot/starter/rabbitmq/exchange/DelayExchangeBuilder.java
@@ -15,18 +15,21 @@ public class DelayExchangeBuilder {
     /**
      * 默认延迟消息交换器
      */
-    public final static  String DEFAULT_DELAY_EXCHANGE = "jero.delayed.exchange";
+    public static final  String DEFAULT_DELAY_EXCHANGE = "jero.delayed.exchange";
     /**
      * 普通交换器
      */
-    public final static  String DELAY_EXCHANGE = "jero.direct.exchange";
+    public static final  String DELAY_EXCHANGE = "jero.direct.exchange";
+
+    private DelayExchangeBuilder() {
+    }
 
     /**
      * 构建延迟消息交换器
      * @return
      */
     public static CustomExchange buildExchange() {
-        Map<String, Object> args = new HashMap<String, Object>();
+        Map<String, Object> args = new HashMap<>();
         args.put("x-delayed-type", "direct");
         return new CustomExchange(DEFAULT_DELAY_EXCHANGE, "x-delayed-message", true, false, args);
     }