pageaction.java

一个jsp翻页的小例子

/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package com.page.struts.action;

import java.util.ArrayList;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import com.page.struts.form.PageForm;

/** 
 * MyEclipse Struts
 * Creation date: 02-11-2009
 * 
 * XDoclet definition:
 * @struts.action path="/page" name="pageForm" input="/page.jsp" scope="request" validate="true"
 */
public class PageAction extends Action {
	/*
	 * Generated Methods
	 */
	//public PageListAction(){}
   
   

	/** 
	 * Method execute
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) throws Exception {
		PageForm pageForm = (PageForm) form;// TODO Auto-generated method stub
		List list = new ArrayList();
		String action;        
		action=request.getParameter("action"); 
		
		/*if(action==null || action.equals("null"))
		{ 
			//第一次读取数据
			list = BD.getList();
			System.out.println("第一步，数据已经成功传递到Action，action="+action);
				
			          
		    PageBean  pb = new PageBean(list);
	        BD[] bds = pb.getBooks();
            pb.description();
            request.setAttribute("result",bds);
            request.setAttribute("page",pb);
			                   
		}
		else
		   {
	         if(action=="nextPage" || action.equals("nextPage"))
	         {
		         System.out.println("参数action="+action);
		         System.out.println("函数pb.getNextPage()准备执行");
		         list = BD.getList();
		         PageBean  pb = new PageBean(list);
		         BD[] bds = pb.getNextPage();
		         request.setAttribute("page",pb);
		         request.setAttribute("result",bds);                 
		     }
	         if(action=="previousPage" || action.equals("previousPage"))
		     {
	        	 list = BD.getList();
		         System.out.println("参数action="+action);
		         System.out.println("函数pb.getPreviouspage()准备执行");
		         PageBean  pb = new PageBean(list);
		         BD[] bds = pb.getPreviouspage();         
		         request.setAttribute("page",pb);
		         request.setAttribute("result",bds);
		      }
		    }
		    return (mapping.findForward("success"));
		   }   */
		return null;
	}
}