diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index c81a59f..6cafe41 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -3,8 +3,6 @@
   <component name="ChangeListManager">
     <list default="true" id="42982c84-cdb2-4596-b4aa-818c31fc199a" name="Default" comment="">
       <change type="MODIFICATION" beforePath="$PROJECT_DIR$/README.md" afterPath="$PROJECT_DIR$/README.md" />
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/src/main/java/security.java" afterPath="$PROJECT_DIR$/src/main/java/security.java" />
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/src/main/java/test.java" afterPath="$PROJECT_DIR$/src/main/java/test.java" />
     </list>
     <ignored path="$PROJECT_DIR$/out/" />
     <ignored path="$PROJECT_DIR$/target/" />
@@ -34,8 +32,8 @@
         <entry file="file://$PROJECT_DIR$/README.md">
           <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
             <state split_layout="SPLIT">
-              <first_editor relative-caret-position="37">
-                <caret line="29" column="14" lean-forward="true" selection-start-line="29" selection-start-column="14" selection-end-line="29" selection-end-column="14" />
+              <first_editor relative-caret-position="-29">
+                <caret line="27" column="0" lean-forward="false" selection-start-line="27" selection-start-column="0" selection-end-line="27" selection-end-column="0" />
                 <folding />
               </first_editor>
               <second_editor />
@@ -658,12 +656,12 @@
       <option name="number" value="Default" />
       <option name="presentableId" value="Default" />
       <updated>1504604417100</updated>
-      <workItem from="1504604422158" duration="4673000" />
+      <workItem from="1504604422158" duration="4803000" />
     </task>
     <servers />
   </component>
   <component name="TimeTrackingManager">
-    <option name="totallyTimeSpent" value="4673000" />
+    <option name="totallyTimeSpent" value="4803000" />
   </component>
   <component name="ToolWindowManager">
     <frame x="0" y="0" width="1280" height="800" extended-state="0" />
@@ -786,8 +784,8 @@
     <entry file="file://$PROJECT_DIR$/README.md">
       <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
         <state split_layout="SPLIT">
-          <first_editor relative-caret-position="37">
-            <caret line="29" column="14" lean-forward="true" selection-start-line="29" selection-start-column="14" selection-end-line="29" selection-end-column="14" />
+          <first_editor relative-caret-position="-29">
+            <caret line="27" column="0" lean-forward="false" selection-start-line="27" selection-start-column="0" selection-end-line="27" selection-end-column="0" />
             <folding />
           </first_editor>
           <second_editor />
diff --git a/README.md b/README.md
index 4373256..937cd58 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@
 
 ### 验证代码
 
-合法URL返回true，非法URL返回false
+合法URL返回true，非法URL返回false。
 
 ```java
 security checkUrl = new security();
@@ -24,6 +24,7 @@ System.out.println(ret);
 ## SSRF
 
 JAVA默认dns请求会有30s的缓存，所以默认不存在dns rebind问题。除非重新设置ttl为0。
+
 ### 验证逻辑
 
 1. 取URL的IP
@@ -39,6 +40,7 @@ JAVA默认dns请求会有30s的缓存，所以默认不存在dns rebind问题。
 URL只支持HTTP协议。
 
 ```java
+security checkUrl = new security();
 ret = checkUrl.checkSSRF("http://127.0.0.1");
 System.out.println(ret);
 ```