diff --git a/build.gradle b/build.gradle
index 73b138e..cbc77ee 100644
--- a/build.gradle
+++ b/build.gradle
@@ -16,7 +16,7 @@ plugins {
 }
 
 group 'cn.reddragon'
-version '1.0-SNAPSHOT'
+version '1.2'
 
 repositories {
     mavenCentral()
diff --git a/src/main/java/cn/reddragon/eportal/Authenticator.java b/src/main/java/cn/reddragon/eportal/Authenticator.java
index 41e9582..c2aff6b 100644
--- a/src/main/java/cn/reddragon/eportal/Authenticator.java
+++ b/src/main/java/cn/reddragon/eportal/Authenticator.java
@@ -27,32 +27,36 @@ public static HttpURLConnection login(String username, String password, String s
             out.flush();
             connection.connect();
             return connection;
-        }catch (Exception e) {
+        } catch (Exception e) {
             e.printStackTrace();
             return null;
         }
     }
 
-    public static String getUserIndex() throws IOException {
-        if (!Authenticator.isOnline()) {
-            return null;
+    public static void getUserIndex() {
+        if (!Authenticator.getOnline()) {
+            userIndex = null;
+        }
+        try {
+            HttpURLConnection connection = HttpUtils.make("http://10.96.0.155/eportal/redirectortosuccess.jsp", "GET");
+            connection.setInstanceFollowRedirects(false);
+            connection.connect();
+            Map<String, List<String>> result = connection.getHeaderFields();
+            String redirectLocation = result.get("Location").get(0);
+            userIndex = redirectLocation.substring(redirectLocation.indexOf('=') + 1);
+        } catch (IOException e) {
+            e.printStackTrace();
+            userIndex = null;
         }
-        HttpURLConnection connection = HttpUtils.make("http://10.96.0.155/eportal/redirectortosuccess.jsp", "GET");
-        connection.setInstanceFollowRedirects(false);
-        connection.connect();
-        Map<String, List<String>> result = connection.getHeaderFields();
-        String redirectLocation = result.get("Location").get(0);
-        String r = redirectLocation.substring(redirectLocation.indexOf('=') + 1);
-        userIndex = r;
-        return r;
     }
 
-    public static HttpURLConnection logout(String userIndex) {
-        String content = "userIndex=" + userIndex;
+    //经过测试，登出时不需要userIndex也能成功登出
+    public static HttpURLConnection logout() {
+        String content = "userIndex=" + userIndex();
         try {
             HttpURLConnection connection = HttpUtils.make(ePortalUrl + "logout", "POST");
             connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
-            connection.setRequestProperty("Referer", "http://10.96.0.155/eportal/success.jsp?userIndex=" + userIndex);
+            connection.setRequestProperty("Referer", "http://10.96.0.155/eportal/success.jsp?userIndex=" + userIndex());
             PrintWriter out = new PrintWriter(connection.getOutputStream());
             out.print(content);
             out.flush();
@@ -63,7 +67,18 @@ public static HttpURLConnection logout(String userIndex) {
         }
     }
 
-    public static boolean isOnline() {
+    public static boolean getOnline() {
+        return online;
+    }
+
+    public static String userIndex() {
+        if (userIndex == null) {
+            getUserIndex();
+        }
+        return userIndex;
+    }
+
+    public static void checkOnline() {
         try {
             HttpURLConnection connection = HttpUtils.make("http://10.96.0.155/eportal/redirectortosuccess.jsp", "GET");
             connection.setInstanceFollowRedirects(false);
@@ -72,14 +87,7 @@ public static boolean isOnline() {
             String redirectLocation = result.get("Location").get(0);
             if (Objects.equals(redirectLocation, "Http://123.123.123.123")) {
                 online = false;
-                return false;
-            } else if (redirectLocation.contains("http://10.96.0.155/eportal/./success.jsp?")) {
-                online = true;
-                return true;
-            } else {
-                online = false;
-                return false;
-            }
+            } else online = redirectLocation.contains("http://10.96.0.155/eportal/./success.jsp?");
         } catch (SocketTimeoutException e) {
             if (SystemTray.isSupported()) {
                 SystemTray tray = SystemTray.getSystemTray();
@@ -95,7 +103,6 @@ public static boolean isOnline() {
                 tray.remove(icon);
                 System.exit(0);
             }
-            return false;
         } catch (NoRouteToHostException e) {
             if (SystemTray.isSupported()) {
                 SystemTray tray = SystemTray.getSystemTray();
@@ -111,10 +118,8 @@ public static boolean isOnline() {
                 tray.remove(icon);
                 System.exit(0);
             }
-            return false;
         } catch (IOException e) {
             online = false;
-            return false;
         }
     }
 }
diff --git a/src/main/java/cn/reddragon/eportal/HelloApplication.java b/src/main/java/cn/reddragon/eportal/HelloApplication.java
index aea1bc3..55f38ad 100644
--- a/src/main/java/cn/reddragon/eportal/HelloApplication.java
+++ b/src/main/java/cn/reddragon/eportal/HelloApplication.java
@@ -25,10 +25,10 @@ public class HelloApplication extends Application {
             } catch (InterruptedException e) {
                 //throw new RuntimeException(e);
             }
-            Authenticator.isOnline();
             Platform.runLater(() -> {
-                statusLabel.setText("Current status:" + (Authenticator.online ? "Online" : "Offline"));
-                if (Authenticator.online) {
+                Authenticator.checkOnline();
+                statusLabel.setText("Current status:" + (Authenticator.getOnline() ? "Online" : "Offline"));
+                if (Authenticator.getOnline()) {
                     button.setText("Logout");
                 } else {
                     button.setText("Login");
@@ -37,33 +37,9 @@ public class HelloApplication extends Application {
         }
     });
 
-    @Override
-    public void start(Stage stage) throws IOException {
-        FXMLLoader fxmlLoader = new FXMLLoader(HelloApplication.class.getResource("hello-view.fxml"));
-        Parent root = fxmlLoader.load();
-        Scene scene = new Scene(root, 320, 240);
-        ChoiceBox box = (ChoiceBox) root.lookup("#selector");
-        box.getItems().addAll("LAN", "WAN");
-        box.setValue("WAN");
-        statusLabel = (Label) root.lookup("#statusLabel");
-        button = (Button) root.lookup("#button");
-        stage.setTitle("EPortal");
-        stage.setScene(scene);
-        stage.show();
-        String[] config = Config.read();
-        TextField name = (TextField) root.lookup("#userNameField");
-        TextField pass = (TextField) root.lookup("#passwordField");
-        name.setText(config[0]);
-        pass.setText(config[1]);
-        askThread.start();
-        if (!Authenticator.online) {
-            button.getOnAction().handle(new ActionEvent());
-        }
-    }
-
     public static void main(String[] args) {
         try {
-            if (Authenticator.isOnline()) {
+            if (Authenticator.getOnline()) {
                 System.out.println("Already connected!");
                 if (SystemTray.isSupported()) {
                     SystemTray tray = SystemTray.getSystemTray();
@@ -83,9 +59,33 @@ public static void main(String[] args) {
         } catch (NullPointerException | AWTException e) {
             e.printStackTrace();
             System.exit(0);
-        } catch (IOException ignored) {
         }
         launch();
         System.exit(0);
     }
+
+    @Override
+    public void start(Stage stage) throws IOException {
+        FXMLLoader fxmlLoader = new FXMLLoader(HelloApplication.class.getResource("hello-view.fxml"));
+        Parent root = fxmlLoader.load();
+        Scene scene = new Scene(root, 320, 240);
+        ChoiceBox box = (ChoiceBox) root.lookup("#selector");
+        box.getItems().addAll("LAN", "WAN");
+        box.setValue("WAN");
+        statusLabel = (Label) root.lookup("#statusLabel");
+        button = (Button) root.lookup("#button");
+        stage.setTitle("EPortal");
+        stage.setScene(scene);
+        stage.show();
+        String[] config = Config.read();
+        TextField name = (TextField) root.lookup("#userNameField");
+        TextField pass = (TextField) root.lookup("#passwordField");
+        name.setText(config[0]);
+        pass.setText(config[1]);
+        askThread.start();
+        Authenticator.checkOnline();
+        if (!Authenticator.getOnline()) {
+            button.getOnAction().handle(new ActionEvent());
+        }
+    }
 }
\ No newline at end of file
diff --git a/src/main/java/cn/reddragon/eportal/HelloController.java b/src/main/java/cn/reddragon/eportal/HelloController.java
index 6e49584..02a0ff3 100644
--- a/src/main/java/cn/reddragon/eportal/HelloController.java
+++ b/src/main/java/cn/reddragon/eportal/HelloController.java
@@ -30,28 +30,27 @@ public class HelloController {
 
     @FXML
     protected void onLoginButtonClick() {
-        if (Authenticator.online) {
+        if (Authenticator.getOnline()) {
             if (button.getText().equals("Login")) {
                 resultText.setText("Already logged in!");
                 button.setText("Logout");
             } else if (button.getText().equals("Logout")) {
                 try {
-                    //经过测试，登出时不需要userIndex也能成功登出
-                    //为了避免不必要的麻烦，仍然传入userIndex
-                    HttpURLConnection connection = Authenticator.logout(Authenticator.userIndex);
+                    HttpURLConnection connection = Authenticator.logout();
                     if (connection == null) {
                         resultText.setText("Error!");
                         return;
                     }
                     JsonObject resultMessage = JsonParser.parseString(IOUtils.readText(connection.getInputStream())).getAsJsonObject();
                     System.out.println(resultMessage.toString());
-                    String result = resultMessage.get("result").getAsString();
-                    if (result.equals("success")) {
+                    //String result = resultMessage.get("result").getAsString();
+                    resultText.setText(resultMessage.get("result").getAsString() + ":" + resultMessage.get("message").getAsString());
+                   /* if (result.equals("success")) {
                         resultText.setText("success!" + resultMessage.get("message").getAsString());
                         button.setText("Login");
                     } else if (result.equals("fail")) {
                         resultText.setText("fail!" + resultMessage.get("message").getAsString());
-                    }
+                    }*/
                 } catch (Exception e) {
                     e.printStackTrace();
                 }
@@ -106,14 +105,19 @@ protected void onLoginButtonClick() {
             JsonObject resultMessage = JsonParser.parseString(IOUtils.readText(loginConnection.getInputStream())).getAsJsonObject();
             System.out.println(resultMessage.toString());
             String result = resultMessage.get("result").getAsString();
-            if (result.equals("fail")) {
+            resultText.setText(resultMessage.get("result").getAsString() + ":" + resultMessage.get("message").getAsString());
+            if (result.equals("success")) {
+                Authenticator.userIndex = resultMessage.get("userIndex").getAsString();
+                Config.save(username, password);
+            }
+            /*if (result.equals("fail")) {
                 resultText.setText(resultMessage.get("message").getAsString());
             } else if (result.equals("success")) {
                 resultText.setText("Success!" + resultMessage.get("message").getAsString());
                 Authenticator.userIndex = resultMessage.get("userIndex").getAsString();
                 button.setText("Logout");
                 Config.save(username, password);
-            }
+            }*/
         } catch (Exception e) {
             e.printStackTrace();
         }
diff --git a/src/main/java/cn/reddragon/eportal/utils/IOUtils.java b/src/main/java/cn/reddragon/eportal/utils/IOUtils.java
index 5b0ba0d..6c58f13 100644
--- a/src/main/java/cn/reddragon/eportal/utils/IOUtils.java
+++ b/src/main/java/cn/reddragon/eportal/utils/IOUtils.java
@@ -1,20 +1,24 @@
 package cn.reddragon.eportal.utils;
 
+import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.nio.charset.StandardCharsets;
 
 public class IOUtils {
     public static String readText(InputStream stream) {
         try {
-            InputStreamReader reader = new InputStreamReader(stream);
-            StringBuilder sb = new StringBuilder();
+            InputStreamReader reader = new InputStreamReader(stream, StandardCharsets.UTF_8);
+            BufferedReader bufferedReader = new BufferedReader(reader);
+            return bufferedReader.readLine();
+            /*StringBuilder sb = new StringBuilder();
             int ch = reader.read();
             while (ch != -1) {
                 sb.append((char) ch);
                 ch = reader.read();
             }
-            return sb.toString();
+            return sb.toString();*/
         } catch (IOException e) {
             e.printStackTrace();
             return "";