一个标准的MVC结构的SSI，实现了用户注册，查询，删除，修改操作

package com.song.action; import java.util.HashMap; import java.util.List; import java.util.Map; import org.apache.struts2.interceptor.RequestAware; import com.opensymphony.xwork2.ActionSupport; import com.song.model.Users; import com.song.service.UserService; public class RegisterAction extends ActionSupport implements RequestAware { private static final long serialVersionUID = 1L; private UserService userService; private Users user; private int id; private Map<String, Object> data = new HashMap<String, Object>(); public Map<String, Object> getData() { return data; } public void setData(Map<String, Object> data) { this.data = data; } public UserService getUserService() { return userService; } public void setUserService(UserService userService) { this.userService = userService; } public Users getUser() { return user; } public void setUser(Users user) { this.user = user; } public int getId() { return id; } public void setId(int id) { this.id = id; } public String execute() { if (userService.isRegister(user)) { return "ok"; } return "error"; } public String queryAllUsers() { List<Users> list = userService.queryAll(); data.put("users", list); return SUCCESS; } public String deleteUser() { Users u = userService.queryUserById(id); userService.deleteUser(u.getId()); data.put("users", userService.queryAll()); return SUCCESS; } public String queryUserUpdate(){ Users u = userService.queryUserById(id); data.put("user1", u); return SUCCESS; } public String updateUser(){ userService.updateUser(user); data.put("users", userService.queryAll()); return SUCCESS; } public void setRequest(Map<String, Object> arg0) { this.data = arg0; } }