diff --git a/src/main/java/com/loafle/overflow/crawler/jmx/JmxCrawler.java b/src/main/java/com/loafle/overflow/crawler/jmx/JmxCrawler.java
index 6c59c7f..404075c 100644
--- a/src/main/java/com/loafle/overflow/crawler/jmx/JmxCrawler.java
+++ b/src/main/java/com/loafle/overflow/crawler/jmx/JmxCrawler.java
@@ -130,7 +130,7 @@ public class JmxCrawler extends Crawler{
 
         int start = s.indexOf("[");
         int end = s.lastIndexOf("]");
-        s = s.substring(start,end);
+        s = s.substring(start+1,end);
 
         String [] slices = s.split(",");
         String returnData = "";
diff --git a/src/test/java/com/loafle/AppTest.java b/src/test/java/com/loafle/AppTest.java
index 5027b49..df3c33c 100644
--- a/src/test/java/com/loafle/AppTest.java
+++ b/src/test/java/com/loafle/AppTest.java
@@ -3,14 +3,13 @@ package com.loafle;
 import static org.junit.Assert.*;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
-import com.loafle.overflow.crawler.Crawler;
 import com.loafle.overflow.crawler.config.*;
 import com.loafle.overflow.crawler.jmx.JmxCrawler;
 import com.loafle.overflow.crawler.result.OFResultSet;
 import org.junit.Test;
 
 import java.io.File;
-import java.util.ArrayList;
+import java.net.URL;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -25,6 +24,7 @@ public class AppTest {
     public void TestDoCrawler() throws Exception {
 
         ClassLoader classLoader = getClass().getClassLoader();
+        URL url = classLoader.getResource("config/");
         String path = classLoader.getResource("config/example.json").getFile();
 
         ObjectMapper mapper = new ObjectMapper();
diff --git a/src/test/resources/config/example.json b/src/test/resources/config/example.json
index 0b1112a..86b258f 100644
--- a/src/test/resources/config/example.json
+++ b/src/test/resources/config/example.json
@@ -21,23 +21,23 @@
   "items" : [
     {
       "keys" : [
-        {"metric" : "net.connector[$0].localPort",          "key" : "localPort"},
-        {"metric" : "net.connector[$0].port",               "key" : "port"},
-        {"metric" : "net.connector[$0].protocol",           "key" : "protocol"}
+        {"metric" : "net.connector[$0].requestCount",          "key" : "requestCount"},
+        {"metric" : "net.connector[$0].loadOnStartup",         "key" : "loadOnStartup"},
+        {"metric" : "net.connector[$0].errorCount",            "key" : "errorCount"}
       ],
       "queryInfo" : {
-        "query": "*Catalina:type=Connector,*",
+        "query": "*Catalina:j2eeType=Servlet,*",
         "extend" : {
           "aliases" : [
             {
-              "key": "port",
+              "key": "Catalina:j2eeType",
               "index":0
             }
           ]
         }
       },
       "mappingInfo" : {
-        "arrayColumns" : [ "portName" ]
+        "arrayColumns" : [ "Servlet" ]
       }
     }
   ]