DispatchAction 访问

最新推荐文章于 2018-08-25 14:10:20 发布

原创最新推荐文章于 2018-08-25 14:10:20 发布 · 681 阅读

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文章标签：

#exception #action #user #login #class #null

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本文介绍了一种基于Struts2框架的分发Action机制，通过定义基类BaseAction来实现权限验证，并通过覆盖execute方法继续动态分发请求到具体的处理方法。此外，还展示了如何在继承BaseAction的子类AclAction中实现特定操作。

让一个基ACTION先继续动态ACTION.然后再分发到其它继承了本基ACTION的动态分发处理ACTION
/**
*DispatchAction 分发访问
*
**/

public class BaseAction extends DispatchAction {

@Override
public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {

  添加权限判断的代码
  User user = (User)request.getSession().getAttribute("login");
  if(user == null){
   return mapping.findForward("login");
  }

  继续父类的职责，即将请求分发到不同的方法中！
  return super.execute(mapping, form, request, response);
}

}
============================================

public class AclAction extends BaseAction {

//再实现动态ACTION应该的操作
@Override
protected ActionForward unspecified(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {

  AclActionForm aaf = (AclActionForm)form;

  .......

return mapping.findForward("index");
}

//多个处理
protected ActionForward add(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {

  AclActionForm aaf = (AclActionForm)form;

  .......

return mapping.findForward("index");
}

DispatchAction处理多访问