pagelistaction.java

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//Created by MyEclipse Struts
// XSL source (default): platform:/plugin/com.genuitec.eclipse.cross.easystruts.eclipse_3.9.210/xslt/JavaClass.xsl

package com.phone.struts.action;

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;

/** 
 * MyEclipse Struts
 * Creation date: 12-26-2005
 * 
 * XDoclet definition:
 * @struts:action scope="request"
 */

import com.phone.struts.db.DatabaseConn;
import com.phone.struts.db.Book;
import com.phone.struts.db.PageBean;

import java.sql.Connection;
import java.util.*;
public class PageListAction extends Action {

	// --------------------------------------------------------- Instance Variables

	// --------------------------------------------------------- Methods

	/** 
	 * Method execute
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 */
	
	public PageListAction(){}
	 ArrayList arrayList=new ArrayList();
	    PageBean pb;

	public ActionForward execute(
		ActionMapping mapping,
		ActionForm form,
		HttpServletRequest request,
		HttpServletResponse response) {

		String action; 
		action=request.getParameter("action");   
		if(action==null || action.equals("null")){ //第一次读取数据
		try{
		Connection conn= DatabaseConn.getConnection(); 
		arrayList=Book.getAllBook(conn);
		System.out.println("第一步，数据已经成功传递到Action，action="+action);
		   }catch(Exception e){
		          e.printStackTrace();
		  System.out.println("数据库连接出现异常");
		      } 
		   
		     pb=new PageBean(arrayList);
		          Book[] books=pb.getBooks();
		          pb.description();
		          request.setAttribute("result",books);
		          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");
		  Book[]books=pb.getNextPage();
		  request.setAttribute("page",pb);
		 request.setAttribute("result",books);   
		    }
		if(action=="previousPage" || action.equals("previousPage"))
		  {
		  System.out.println("参数action="+action);
		  System.out.println("函数pb.getPreviouspage()准备执行");
		  Book[] books=pb.getPreviouspage();  
		  request.setAttribute("page",pb);
		               request.setAttribute("result",books);
		    
		    }
		   }
		   return (mapping.findForward("success"));
		  } 
		}