feat(interactive): enhance struts learning pages with task cards and quick experiments

2026-03-09 23:57:50 +08:00
commit 0bbfdd1d7a
14 changed files with 941 additions and 0 deletions
--- a/src/main/java/com/example/struts2/UserFormAction.java
+++ b/src/main/java/com/example/struts2/UserFormAction.java
@@ -0,0 +1,106 @@
+package com.example.struts2;
+
+import com.opensymphony.xwork2.ActionSupport;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * 用户管理 Action - CRUD 示例
+ * 
+ * 学习点：
+ * - Session 范围数据
+ * - 多个处理方法
+ * - 动态方法调用
+ */
+public class UserFormAction extends ActionSupport {
+    
+    private static List<User> users = new ArrayList<>();
+    private static Long idCounter = 1L;
+    
+    private User user = new User();
+    private Long id;
+    private List<User> userList;
+    
+    static {
+        users.add(new User(idCounter++, "张三", "zhangsan@example.com", 25));
+        users.add(new User(idCounter++, "李四", "lisi@example.com", 30));
+        users.add(new User(idCounter++, "王五", "wangwu@example.com", 28));
+    }
+    
+    // 列表
+    public String list() {
+        userList = new ArrayList<>(users);
+        return SUCCESS;
+    }
+    
+    // 添加
+    public String add() {
+        user.setId(idCounter++);
+        users.add(user);
+        return SUCCESS;
+    }
+    
+    // 编辑页面
+    public String edit() {
+        for (User u : users) {
+            if (u.getId().equals(id)) {
+                user = u;
+                break;
+            }
+        }
+        return SUCCESS;
+    }
+    
+    // 更新
+    public String update() {
+        for (int i = 0; i < users.size(); i++) {
+            if (users.get(i).getId().equals(user.getId())) {
+                users.set(i, user);
+                break;
+            }
+        }
+        return SUCCESS;
+    }
+    
+    // 删除
+    public String delete() {
+        users.removeIf(u -> u.getId().equals(id));
+        return SUCCESS;
+    }
+    
+    // Getters and Setters
+    public User getUser() { return user; }
+    public void setUser(User user) { this.user = user; }
+    
+    public Long getId() { return id; }
+    public void setId(Long id) { this.id = id; }
+    
+    public List<User> getUserList() { return userList; }
+    public void setUserList(List<User> userList) { this.userList = userList; }
+    
+    // 内部类 - 用户实体
+    public static class User {
+        private Long id;
+        private String name;
+        private String email;
+        private Integer age;
+        
+        public User() {}
+        
+        public User(Long id, String name, String email, Integer age) {
+            this.id = id;
+            this.name = name;
+            this.email = email;
+            this.age = age;
+        }
+        
+        public Long getId() { return id; }
+        public void setId(Long id) { this.id = id; }
+        public String getName() { return name; }
+        public void setName(String name) { this.name = name; }
+        public String getEmail() { return email; }
+        public void setEmail(String email) { this.email = email; }
+        public Integer getAge() { return age; }
+        public void setAge(Integer age) { this.age = age; }
+    }
+}