diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/utils/FilePersistentBase.java b/webmagic-core/src/main/java/us/codecraft/webmagic/utils/FilePersistentBase.java
index e65e2f9..79b9efe 100644
--- a/webmagic-core/src/main/java/us/codecraft/webmagic/utils/FilePersistentBase.java
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/utils/FilePersistentBase.java
@@ -22,10 +22,10 @@ public class FilePersistentBase {
     }
 
     public void setPath(String path) {
-        this.path = path;
         if (!path.endsWith(PATH_SEPERATOR)) {
             path += PATH_SEPERATOR;
         }
+        this.path = path;
     }
 
     public File getFile(String fullName) {