diff --git a/src/main/java/com/pt/constant/Constants.java b/src/main/java/com/pt/constant/Constants.java
index 5cf22a0..d277ea2 100644
--- a/src/main/java/com/pt/constant/Constants.java
+++ b/src/main/java/com/pt/constant/Constants.java
@@ -4,12 +4,18 @@
 
     public static final int DEFAULT_EXPIRE_TIME = 600000;
 
-    public static enum UserRole {
-        ADMIN(0),
-        USER(1);
+    /*
+        * 用户角色
+        * 0: 普通用户
+        * 1: 管理员
+        * value既用来区分角色，也表示权限大小，value越大权限越大。
+     */
+    public enum UserRole {
+        ADMIN(1),
+        USER(0);
 
         private final int value;
-        private UserRole(int value) {
+        UserRole(int value) {
             this.value = value;
         }