feat: expand struts demo lab

web/WEB-INF/classes/com/demo/model/User.java

@@ -1,30 +1,54 @@
 package com.demo.model;
 
-/**
- * 用户模型
- * 展示 Struts2 的 ModelDriven 和 Bean 封装
- */
 public class User {
     private Long id;
     private String username;
     private String email;
     private String phone;
-    
-    public User() {}
-    
+
+    public User() {
+    }
+
     public User(Long id, String username, String email) {
+        this(id, username, email, null);
+    }
+
+    public User(Long id, String username, String email, String phone) {
         this.id = id;
         this.username = username;
         this.email = email;
+        this.phone = phone;
     }
-    
-    // Getters and Setters
-    public Long getId() { return id; }
-    public void setId(Long id) { this.id = id; }
-    public String getUsername() { return username; }
-    public void setUsername(String username) { this.username = username; }
-    public String getEmail() { return email; }
-    public void setEmail(String email) { this.email = email; }
-    public String getPhone() { return phone; }
-    public void setPhone(String phone) { this.phone = phone; }
-}
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public String getPhone() {
+        return phone;
+    }
+
+    public void setPhone(String phone) {
+        this.phone = phone;
+    }
+}