diff --git a/src/burp/Commons.java b/src/burp/Commons.java
index f71e5d59..34296204 100644
--- a/src/burp/Commons.java
+++ b/src/burp/Commons.java
@@ -71,7 +71,7 @@ public static boolean isResponseNull(IHttpRequestResponse message){
 	 */
 	public static boolean uselessExtension(String urlpath) {
 		String extensions = "css|jpeg|gif|jpg|png|rar|zip|svg|jpeg|ico|woff|woff2|ttf|otf";
-		String[] extList = extensions.split("|");
+		String[] extList = extensions.split("\\|");
 		for ( String item:extList) {
 			if(urlpath.endsWith("."+item)) {
 				return true;
@@ -721,8 +721,12 @@ public static void test7() {
 		System.out.println(IPSet);
 		System.out.println(CDNSet);
 	}
+	
+	public static void test8() {
+		System.out.println(uselessExtension("abc.css"));
+	}
 
 	public static void main(String args[]) {
-		test7();
+		test8();
 	}
 }
diff --git a/src/test/urltest.java b/src/test/urltest.java
index d7a441ab..28a93ca2 100644
--- a/src/test/urltest.java
+++ b/src/test/urltest.java
@@ -11,13 +11,13 @@ public class urltest
    public static void main(String [] args)
    {
 	   //System.out.println(getFullUrlStringWithoutDefaultPort());
-	   test3();
+	   test();
    }
-   public void test() {
+   public static void test() {
 	      try
 	      {
-	         URL url = new URL("https://www.runoob.com/index.html?language=cn#j2se");
-	         URL url1 = new URL("https://www.runoob.com:443/index.html?language=cn#j2se");
+	         URL url = new URL("https://www.runoob.com/xxxx/index.html?language=cn#j2se");
+	         URL url1 = new URL("https://www.runoob.com:443/xxxx/index.html?language=cn#j2se");
 	         System.out.println(url.equals(url1));
 	         System.out.println("URL 为：" + url.toString());
 	         System.out.println("协议为：" + url.getProtocol());