diff --git a/src/main/java/com/alibaba/druid/stat/DruidStatService.java b/src/main/java/com/alibaba/druid/stat/DruidStatService.java
index 4e1268390a..894a9d0cbc 100644
--- a/src/main/java/com/alibaba/druid/stat/DruidStatService.java
+++ b/src/main/java/com/alibaba/druid/stat/DruidStatService.java
@@ -59,7 +59,9 @@ public final class DruidStatService implements DruidStatServiceMBean {
 
     private final static int              DEFAULT_PAGE           = 1;
     private final static int              DEFAULT_PER_PAGE_COUNT = Integer.MAX_VALUE;
-    private static final String           DEFAULT_ORDER_TYPE     = "asc";
+    private static final String           ORDER_TYPE_DESC        = "desc";
+    private static final String           ORDER_TYPE_ASC         = "asc";
+    private static final String           DEFAULT_ORDER_TYPE     = ORDER_TYPE_ASC;
     private static final String           DEFAULT_ORDERBY        = "SQL";
 
     private DruidStatService(){
@@ -220,7 +222,7 @@ public final class DruidStatService implements DruidStatServiceMBean {
         Integer page = DEFAULT_PAGE;
         Integer perPageCount = DEFAULT_PER_PAGE_COUNT;
         if (parameters == null) {
-            orderBy = DEFAULT_ORDER_TYPE;
+            orderBy = DEFAULT_ORDERBY;
             orderType = DEFAULT_ORDER_TYPE;
             page = DEFAULT_PAGE;
             perPageCount = DEFAULT_PER_PAGE_COUNT;
@@ -241,13 +243,13 @@ public final class DruidStatService implements DruidStatServiceMBean {
         orderBy = orderBy == null ? DEFAULT_ORDERBY : orderBy;
         orderType = orderType == null ? DEFAULT_ORDER_TYPE : orderType;
 
-        if (!"desc".equals(orderType)) {
-            orderType = DEFAULT_ORDER_TYPE;
+        if (! ORDER_TYPE_DESC.equals(orderType)) {
+            orderType = ORDER_TYPE_ASC;
         }
 
         // orderby the statData array
-        if (orderBy != null && orderBy.trim().length() != 0) {
-            Collections.sort(array, new MapComparator<String, Object>(orderBy, DEFAULT_ORDER_TYPE.equals(orderType)));
+        if (orderBy.trim().length() != 0) {
+            Collections.sort(array, new MapComparator<String, Object>(orderBy, ORDER_TYPE_DESC.equals(orderType)));
         }
 
         // page