From 20d01f507d32e3cfd0b0806ee70d3c711a746d5b Mon Sep 17 00:00:00 2001
From: tianyuan <2861334240@qq.com>
Date: Sat, 11 Oct 2025 20:42:54 +0800
Subject: [PATCH] =?UTF-8?q?=E8=A7=A3=E5=86=B3=E7=94=A8=E6=88=B7=E5=90=8D?=
 =?UTF-8?q?=E9=87=8D=E5=A4=8D=E9=97=AE=E9=A2=98?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/controller/AppController.java |  4 ++++
 src/controller/UserManager.java   |  8 ++++++++
 src/ui/RegisterPanel.java         | 11 ++++++++++-
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/src/controller/AppController.java b/src/controller/AppController.java
index d9ec606..33da71f 100644
--- a/src/controller/AppController.java
+++ b/src/controller/AppController.java
@@ -104,4 +104,8 @@ public class AppController {
             JOptionPane.showMessageDialog(frame, "请输入有效的数字！");
         }
     }
+
+    public UserManager getUserManager() {
+        return userManager;
+    }
 }
\ No newline at end of file
diff --git a/src/controller/UserManager.java b/src/controller/UserManager.java
index c0d819d..f5fd984 100644
--- a/src/controller/UserManager.java
+++ b/src/controller/UserManager.java
@@ -25,6 +25,14 @@ public class UserManager {
         return users.containsKey(email);
     }
 
+    public boolean isUsernameExists(String username) {
+        for (User user : users.values()) {
+            if (user.getUsername().equalsIgnoreCase(username)) {
+                return true;
+            }
+        }
+        return false;
+    }
     // 修改 addUser 方法，接收 username 参数
     public void addUser(String email, String password, String username) {
         users.put(email, new User(email, password, username));
diff --git a/src/ui/RegisterPanel.java b/src/ui/RegisterPanel.java
index 553b26f..a4d68d0 100644
--- a/src/ui/RegisterPanel.java
+++ b/src/ui/RegisterPanel.java
@@ -1,6 +1,7 @@
 package ui;
 
 import controller.AppController;
+import controller.UserManager;
 import util.EmailUtil;
 
 import javax.swing.*;
@@ -109,7 +110,15 @@ public class RegisterPanel extends JPanel {
                 JOptionPane.showMessageDialog(this, "密码需包含大小写字母与数字，长度6-10位！");
                 return;
             }
-
+            //防止用户名重复
+            if (controller.getUserManager().isUsernameExists(username)) {
+                JOptionPane.showMessageDialog(this, "用户名已存在，请更换！");
+                return;
+            }
+            if (username.isEmpty() || password.isEmpty() || email.isEmpty() || code.isEmpty()) {
+                JOptionPane.showMessageDialog(this, "请填写完整信息！");
+                return;
+            }
             controller.handleRegister(email, password, username); // 传递username
         });
 
-- 
2.34.1