Update IErrorCode.java

mall-common/src/main/java/com/macro/mall/common/api/IErrorCode.java

 package com.macro.mall.common.api;
 
 /**
- * 封装API的错误码
+ * 常用API返回对象接口
  * Created by macro on 2019/4/19.
  */
 public interface IErrorCode {
+    /**
+     * 返回码
+     */
     long getCode();
 
+    /**
+     * 返回信息
+     */
     String getMessage();
 }