AbstractAction

最新推荐文章于 2018-08-03 16:44:43 发布

xyk0830

最新推荐文章于 2018-08-03 16:44:43 发布

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分类专栏：代码文章标签： exception import string class null action

本文链接：https://blog.youkuaiyun.com/xyk0830/article/details/1464033

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本文介绍了一个基于Struts框架的抽象Action类实现，该类通过反射机制动态调用具体的方法，实现了灵活的请求处理流程。文章详细展示了如何通过继承`Action`类创建自定义的`AbstractAction`类，并利用`Logger`进行调试信息记录。

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package com.eb.common;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

public abstract class AbstractAction extends Action{

private DC dc = null;
private Logger logger = Logger.getLogger(AbstractAction.class);

public ActionForward execute(ActionMapping actionMapping,
   ActionForm actionForm,HttpServletRequest request,
   HttpServletResponse response) throws Exception{

  logger.debug("come into method execute()");

  dc = new DC();
  ActionForward nextpage=null;
  nextpage = processExecute(actionMapping,(AbstractActionForm)actionForm,request,response,dc);
  return nextpage;
}
/*
*
*/
private ActionForward processExecute(ActionMapping actionMapping,
   AbstractActionForm form,HttpServletRequest request,
   HttpServletResponse response,DC dc) throws Exception{
  logger.debug("come into processExecute()");

  String forward = (String)this.getClass().getMethod(request.getParameter( "do" ),new Class[] {
   AbstractActionForm.class,
   HttpServletRequest.class,
   HttpServletResponse.class,
   DC.class } ).invoke(this,new Object[] { form,
   request,response,dc } );
  return actionMapping.findForward(forward);
}
protected abstract AbstractVO Form2VO(AbstractActionForm form) throws Exception;
protected abstract AbstractActionForm VO2Form(AbstractVO vo) throws Exception;
protected abstract DC callEJB(DC dc) throws Exception;
}