diff --git a/README.md b/README.md
index 4c5e8ba..3dd1ee9 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,10 @@
 A clubs home for Hangzhou Electron & Information Vocational School
 building by springboot3.0 with mysql db
 ---
+<h1><center><font color="red"> ⚠⚠⚠⚠ <font color="yellow">🚮 D.E.P.R.E.C.A.T.E.D </font>⚠⚠⚠⚠ </font></center></h1>
+
+---
+
 ## Usage
 
 ### 1.Create user table
diff --git a/src/main/java/org/mmga/clubs/service/VerifyCodeService.java b/src/main/java/org/mmga/clubs/service/VerifyCodeService.java
index 6f139c5..1511ee0 100644
--- a/src/main/java/org/mmga/clubs/service/VerifyCodeService.java
+++ b/src/main/java/org/mmga/clubs/service/VerifyCodeService.java
@@ -30,19 +30,19 @@ public class VerifyCodeService {
     public VerifyImgVo generateVerifyCode() {
         int width = 100;
         int height = 40;
-        BufferedImage image = new BufferedImage(width,height,BufferedImage.TYPE_INT_ARGB);
+        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
         Graphics g = image.createGraphics();
-        Font font = new Font("宋体",Font.BOLD,25);
+        Font font = new Font("宋体", Font.BOLD, 25);
         g.setFont(font);
         StringBuilder code = new StringBuilder();
         for (int i = 0; i < 4; i++) {
             int index = new Random().nextInt(StringUtils.source.length() - 1);
             char myCode = StringUtils.source.charAt(index);
             Random random = new Random();
-            g.setColor(new Color(20+random.nextInt(120),20+random.nextInt(120),20+random.nextInt(120)));
-            g.drawString(myCode+"",15+i*20,20+new Random().nextInt(10));
+            g.setColor(new Color(20 + random.nextInt(120), 20 + random.nextInt(120), 20 + random.nextInt(120)));
+            g.drawString(myCode + "", 15 + i * 20, 20 + new Random().nextInt(10));
             for (int j = 0; j < 5; j++) {
-                g.drawLine(random.nextInt(width),random.nextInt(height),random.nextInt(width),random.nextInt(height));
+                g.drawLine(random.nextInt(width), random.nextInt(height), random.nextInt(width), random.nextInt(height));
             }
             code.append(myCode);
         }
@@ -50,17 +50,18 @@ public class VerifyCodeService {
         String s = generatorRandomString(32);
         String codeString = code.toString();
         verifyDao.save(new VerifyVo(s, codeString, new Date()));
-        try(ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream()){
+        try (ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream()) {
             ImageIO.write(image, "png", byteArrayOutputStream);
             return new VerifyImgVo(byteArrayOutputStream.toByteArray(), s);
         }
     }
-    public boolean invalid(String code, String ans){
-        if (code == null || ans == null){
+
+    public boolean invalid(String code, String ans) {
+        if (code == null || ans == null) {
             return true;
         }
         VerifyVo byKey = verifyDao.getByKey(code);
-        if (byKey == null){
+        if (byKey == null) {
             return true;
         }
         verifyDao.delete(byKey);