diff --git a/.idea/vcs.xml b/.idea/vcs.xml
index 35eb1dd..8306744 100644
--- a/.idea/vcs.xml
+++ b/.idea/vcs.xml
@@ -2,5 +2,6 @@
 <project version="4">
   <component name="VcsDirectoryMappings">
     <mapping directory="" vcs="Git" />
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
   </component>
 </project>
\ No newline at end of file
diff --git a/src/main/java/com/witty/handler/IndexHandler.java b/src/main/java/com/witty/handler/IndexHandler.java
index 6293751..e10ea54 100644
--- a/src/main/java/com/witty/handler/IndexHandler.java
+++ b/src/main/java/com/witty/handler/IndexHandler.java
@@ -8,7 +8,7 @@ import java.io.IOException;
 import java.util.UUID;
 
 public class IndexHandler {
-    
+	
     public static void indexHandler(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException {
         response.setContentType("text/html; charset=utf-8");
         response.setStatus(HttpServletResponse.SC_OK);
@@ -16,35 +16,31 @@ public class IndexHandler {
 
         // 拼接服务器地址
         String licenseUrl = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort();
-
-        StringBuffer html = new StringBuffer("<h3>使用说明（Instructions for use）</h3>");
-
-        html.append("<hr/>");
-
-        html.append("<h1>Hello,This is a Jrebel & JetBrains License Server!</h1>");
-        html.append("<p>License Server started at ").append(licenseUrl);
-        html.append("<p>JetBrains Activation address was: <span style='color:red'>").append(licenseUrl).append("/");
-        html.append("<p>JRebel 7.1 and earlier version Activation address was: <span style='color:red'>")
-                .append(licenseUrl).append("/{tokenname}")
-                .append("</span>, with any email.");
-        html.append("<p>JRebel 2018.1 and later version Activation address was: ")
-                .append(licenseUrl).append("/{guid}")
-                .append("(eg:<span style='color:red'>")
-                .append(licenseUrl).append("/").append(UUID.randomUUID())
-                .append("</span>), with any email.");
-
-        html.append("<hr/>");
-        html.append("<h1>Hello，此地址是 Jrebel & JetBrains License Server!</h1>");
-        html.append("<p>JetBrains许可服务器激活地址 ").append(licenseUrl);
-        html.append("<p>JetBrains激活地址是: <span style='color:red'>").append(licenseUrl).append("/");
-        html.append("<p>JRebel 7.1 及旧版本激活地址: <span style='color:red'>")
-                .append(licenseUrl).append("/{tokenname}")
-                .append("</span>, 以及任意邮箱地址。");
-        html.append("<p>JRebel 2018.1+ 版本激活地址: ")
-                .append(licenseUrl).append("/{guid}")
-                .append("(例如：<span style='color:red'>")
-                .append(licenseUrl).append("/").append(UUID.randomUUID())
-                .append("</span>), 以及任意邮箱地址。");
+	    
+	    String html = "<h3>使用说明（Instructions for use）</h3>" + "<hr/>" +
+	                  "<h1>Hello,This is a Jrebel & JetBrains License Server!</h1>" +
+	                  "<p>License Server started at " + licenseUrl +
+	                  "<p>JetBrains Activation address was: <span style='color:red'>" + licenseUrl + "/" +
+	                  "<p>JRebel 7.1 and earlier version Activation address was: <span style='color:red'>" +
+	                  licenseUrl + "/{tokenname}" +
+	                  "</span>, with any email." +
+	                  "<p>JRebel 2018.1 and later version Activation address was: " +
+	                  licenseUrl + "/{guid}" +
+	                  "(eg:<span style='color:red'>" +
+	                  licenseUrl + "/" + UUID.randomUUID() +
+	                  "</span>), with any email." +
+	                  "<hr/>" +
+	                  "<h1>Hello，此地址是 Jrebel & JetBrains License Server!</h1>" +
+	                  "<p>JetBrains许可服务器激活地址 " + licenseUrl +
+	                  "<p>JetBrains激活地址是: <span style='color:red'>" + licenseUrl + "/" +
+	                  "<p>JRebel 7.1 及旧版本激活地址: <span style='color:red'>" +
+	                  licenseUrl + "/{tokenname}" +
+	                  "</span>, 以及任意邮箱地址。" +
+	                  "<p>JRebel 2018.1+ 版本激活地址: " +
+	                  licenseUrl + "/{guid}" +
+	                  "(例如：<span style='color:red'>" +
+	                  licenseUrl + "/" + UUID.randomUUID() +
+	                  "</span>), 以及任意邮箱地址。";
 
         response.getWriter().println(html);
     }