pagelistaction.java

一个极其简单的struts分页源码

package student_info.control.beans;

import org.apache.struts.action.*;
import javax.servlet.http.*;

import student_info.commons.PageBean;
import student_info.model.beans.S_I_Service;
import student_info.model.beans.S_I_Bean;

import java.util.*;

/**
* @author 李敏强
* Struts分页显示Action
*/
public class PageListAction extends Action {

        public PageListAction(){}
        ArrayList arrayList=new ArrayList();
        PageBean pb;
        
        public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {                        
          String action;        
          action=request.getParameter("action");
          S_I_Service service=new S_I_Service();                 
          if(action==null || action.equals("null")){ //第一次读取数据
               try{
                    String s="";                       
                   arrayList=service.getRecord(s);
                   //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);
               S_I_Bean[] sibeans=pb.getS_I_Beans();
               pb.description();
               request.setAttribute("result",sibeans);
               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");
                  S_I_Bean[] sibeans=pb.getNextPage();
                  request.setAttribute("page",pb);
                  request.setAttribute("result",sibeans);                 
            }
            if(action=="previousPage" || action.equals("previousPage")){
                 //System.out.println("参数action="+action);
                 //System.out.println("函数pb.getPreviouspage()准备执行");
                 S_I_Bean[] sibeans=pb.getPreviouspage();         
                 request.setAttribute("page",pb);
                 request.setAttribute("result",sibeans);
                         
           }
        }
       return (mapping.findForward("success"));
      }        
}