ADD file via upload

src/main/java/com/example/myapp/controller/SetPasswordController.java

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+package com.example.myapp.controller;
+
+import com.example.myapp.Main;
+import com.example.myapp.service.UserService;
+import com.example.myapp.util.PasswordUtil;
+import javafx.fxml.FXML;
+import javafx.scene.control.*;
+
+public class SetPasswordController {
+  @FXML private Label emailLabel;
+  @FXML private TextField usernameField;
+  @FXML private PasswordField pwdField;
+  @FXML private PasswordField pwdConfirmField;
+  @FXML private Button setBtn;
+  @FXML private Label statusLabel;
+
+  private String email;
+  private final UserService userService = UserService.getInstance();
+
+  public void setEmail(String email){
+    this.email = email;
+    emailLabel.setText("设置账号信息 - " + email);
+  }
+
+  @FXML
+  public void onSetPassword(){
+    String username = usernameField.getText().trim();
+    String p1 = pwdField.getText();
+    String p2 = pwdConfirmField.getText();
+
+    // 验证用户名
+    if (username.isEmpty()) {
+      statusLabel.setText("请输入用户名");
+      statusLabel.setStyle("-fx-text-fill: red;");
+      return;
+    }
+
+    if (username.length() < 2 || username.length() > 20) {
+      statusLabel.setText("用户名长度应为2-20个字符");
+      statusLabel.setStyle("-fx-text-fill: red;");
+      return;
+    }
+
+    // 检查用户名是否已存在
+    if (userService.usernameExists(username)) {
+      statusLabel.setText("用户名已存在，请选择其他用户名");
+      statusLabel.setStyle("-fx-text-fill: red;");
+      return;
+    }
+
+    // 验证密码
+    if(!p1.equals(p2)){
+      statusLabel.setText("两次密码不一致");
+      statusLabel.setStyle("-fx-text-fill: red;");
+      return;
+    }
+
+    if(!PasswordUtil.validatePasswordRules(p1)){
+      statusLabel.setText("密码不符合规则（6-10位，须含大写、小写和数字）");
+      statusLabel.setStyle("-fx-text-fill: red;");
+      return;
+    }
+
+    // 设置用户名和密码
+    boolean usernameSet = userService.setUsername(email, username);
+    if (!usernameSet) {
+      statusLabel.setText("设置用户名失败");
+      statusLabel.setStyle("-fx-text-fill: red;");
+      return;
+    }
+
+    String hash = PasswordUtil.hash(p1);
+    userService.setPassword(email, hash);
+    statusLabel.setText("注册成功！即将进入用户中心");
+    statusLabel.setStyle("-fx-text-fill: green;");
+
+    try {
+      Main.showDashboard(email);
+    } catch(Exception e){
+      e.printStackTrace();
+    }
+  }
+}