spring+hibernate+pager taglib實現分頁（底層也做了分頁）(二)

現在說中間的控制層。

在Struts的FORM中，增加private int pageDisplay = 10;　屬性，並增加對應的setter和getter方法。這個屬性是用來設置每頁顯示的記錄數，１０是默認值，可以根據實際情況進行設置。

在Struts的ACTION層，增加一個方法，代碼如下

java 代碼

package com.excellence.struts.action;


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.excellence.page.Service;

import com.excellence.struts.form.CheckForm;

public class CheckAction extends Action {

public ActionForward execute(

ActionMapping mapping,

ActionForm form,

HttpServletRequest request,

HttpServletResponse response) {



setSubPage(request,form);



return mapping.findForward("result");

}



private void setSubPage(HttpServletRequest request,ActionForm form){

CheckForm thisForm = (CheckForm)form;

String content = thisForm.getContent();//查詢條件中的內容

Service service = new Service();



//拿到每頁要顯示的記錄數

int pageSize = thisForm.getPageDisplay();

request.setAttribute("pageSize",pageSize+"");

//拿到目前要顯示得頁數

int pageNumber = 1;

String strPageNumber = request.getParameter("page");

if(strPageNumber != null)

pageNumber = Integer.parseInt(strPageNumber);

//計算要顯示的頁數得第一條記錄的位置

int start = 0;

start = (pageNumber - 1)*pageSize;



List result = service.findByCondition("from Subpage where content like ? order by content",new Object[]{content},start,pageSize);

　　 List counts = service.findByCondition("select count(*) from Subpage where content like ?",new Object[]{content});

int count = Integer.parseInt(counts.get(0).toString());

request.setAttribute("count",count+"");//總條數



// 設置總頁數

int totalPage = count % pageSize == 0 ? count / pageSize : (count / pageSize + 1);

request.setAttribute("totalPage",totalPage+"");



request.setAttribute("result",result);

if(result.size() == 0)

request.setAttribute("result",null);

}

}

主要就是增加了一個私有的方法private void setSubPage(HttpServletRequest request,ActionForm form)。