深入解析Java的Struts框架中的控制器DispatchAction

 
用户管理系统 
 

packagecom.bjpowernode.drp.web.actions; 
  
importjava.util.Date; 
importjava.util.List; 
  
importjavax.servlet.http.HttpServletRequest; 
importjavax.servlet.http.HttpServletResponse; 
  
importorg.apache.commons.beanutils.BeanUtils; 
importorg.apache.struts.action.ActionForm; 
importorg.apache.struts.action.ActionForward; 
importorg.apache.struts.action.ActionMapping; 
importorg.apache.struts.actions.DispatchAction; 
  
importcom.bjpowernode.drp.manager.UserManager; 
importcom.bjpowernode.drp.model.User; 
importcom.bjpowernode.drp.web.forms.UserActionForm; 
  
public classUserAction extends DispatchAction { 
  
   
  
  
   protected ActionForward list(ActionMapping mapping, ActionForm form, 
          HttpServletRequestrequest, HttpServletResponse response) 
          throwsException { 
      //调用业务逻辑操作 
      List userList = UserManager.getInstance().findAllUserList(); 
      request.setAttribute("userlist",userList); 
       
      returnmapping.findForward("list_success"); 
   } 
  
   
   /** 
   * 用户删除 
   * @param mapping 
   * @param form 
   * @param request 
   * @param response 
   * @return 
   * @throws Exception 
   */ 
   public ActionForward del(ActionMapping mapping, ActionForm form, 
          HttpServletRequestrequest, HttpServletResponse response) 
          throws Exception { 
      //获取从页面表单中提交过来的值 
      UserActionForm uaf = (UserActionForm)form; 
       
      //取得需要删除的userId的集合 
      String[] userIdList = uaf.getSelectFlag(); 
  
      //调用业务逻辑操作 
      UserManager.getInstance().deleteUsers(userIdList); 
      return mapping.findForward("del_success"); 
   } 
   
   /** 
   * 用户添加 
   * @param mapping 
   * @param form 
   * @param request 
   * @param response 
   * @return 
   * @throws Exception 
   */ 
   public ActionForward add(ActionMapping mapping, ActionForm form, 
          HttpServletRequest request, HttpServletResponse response) 
          throwsException { 
       
      //获取从页面表单中提交过来的值 
      UserActionForm uaf = (UserActionForm)form; 
      Useruser = new User(); 
      BeanUtils.copyProperties(user,uaf); 
      user.setCreateDate(newDate()); 
       
      //调用业务逻辑操作 
      UserManager.getInstance().addUser(user); 
      returnmapping.findForward("add_success");  } 
  
   /** 
   * 修改用户 
   * @param mapping 
   * @param form 
   * @param request 
   * @param response 
   * @return 
   * @throws Exception 
   */ 
   public ActionForward modify(ActionMapping mapping, ActionForm form, 
          HttpServletRequestrequest, HttpServletResponse response) 
          throwsException { 
      //获取从页面表单中提交过来的值 
      UserActionForm uaf = (UserActionForm)form; 
      User user = new User(); 
      BeanUtils.copyProperties(user,uaf); 
       
      //调用业务逻辑操作 
      UserManager.getInstance().modifyUser(user); 
      returnmapping.findForward("modify_success"); 
   } 
   
   /** 
   * 根据ID查询用户 
   * 
   * @param mapping 
   * @param form 
   * @param request 
   * @param response 
   * @return 
   * @throws Exception 
   */ 
   public ActionForward find(ActionMapping mapping, ActionForm form, 
          HttpServletRequestrequest, HttpServletResponse response) 
          throwsException { 
      //获取从页面表单中提交过来的值 
      UserActionForm uaf = (UserActionForm)form; 
       
      String userId = uaf.getUserId(); 
       
      //调用业务逻辑操作 
      User user = UserManager.getInstance().findUserById(userId); 
       
      //将user对象从Action传递到JSP页面 
      request.setAttribute("user",user); 
       
      returnmapping.findForward("find_success"); 
   } 
   
}