以前直接用的jsp，现在用struts做项目，必需结合struts分页，网上找了下，结合别人的劳动成果，完成了符合自己需要的struts分页。下面的代码：
首先是dao BbsContent
/**
*
*/
package vo;
/**
* @author Administrator
*
*/
public class BbsContent {
private int id;
private String title;
private String content;
private String author;
private String publishTime;
private String childrenTitle;
private String superTitle;
private String click;
private String type;
/**
* @return author
*/
public BbsContent() {
}
public BbsContent(int id,String title,String content,String author,String publishtime,String childrenTitle,String superTitle,String type,String click) {
this.id=id;
this.title=title;
this.content=content;
this.author=author;
this.publishTime=publishtime;
this.childrenTitle=childrenTitle;
this.superTitle=superTitle;
this.click=click;
this.type=type;
}
public String getAuthor() {
return author;
}
/**
* @param author 要设置的 author
*/
public void setAuthor(String author) {
this.author = author;
}
/**
* @return childrenTitle
*/
public String getChildrenTitle() {
return childrenTitle;
}
/**
* @param childrenTitle 要设置的 childrenTitle
*/
public void setChildrenTitle(String childrenTitle) {
this.childrenTitle = childrenTitle;
}
/**
* @return click
*/
public String getClick() {
return click;
}
/**
* @param click 要设置的 click
*/
public void setClick(String click) {
this.click = click;
}
/**
* @return content
*/
public String getContent() {
return content;
}
/**
* @param content 要设置的 content
*/
public void setContent(String content) {
this.content = content;
}
/**
* @return id
*/
public int getId() {
return id;
}
/**
* @param id 要设置的 id
*/
public void setId(int id) {
this.id = id;
}
/**
* @return publishTime
*/
public String getPublishTime() {
return publishTime;
}
/**
* @param publishTime 要设置的 publishTime
*/
public void setPublishTime(String publishTime) {
this.publishTime = publishTime;
}
/**
* @return superTitle
*/
public String getSuperTitle() {
return superTitle;
}
/**
* @param superTitle 要设置的 superTitle
*/
public void setSuperTitle(String superTitle) {
this.superTitle = superTitle;
}
/**
* @return title
*/
public String getTitle() {
return title;
}
/**
* @param title 要设置的 title
*/
public void setTitle(String title) {
this.title = title;
}
/**
* @return type
*/
public String getType() {
return type;
}
/**
* @param type 要设置的 type
*/
public void setType(String type) {
this.type = type;
}
}
下面是分页的主要bean BbsThemePageBean
package util;
/*
* @author exceljava xjj
*
*/
import java.util.*;
import vo.BbsContent;
public class BbsThemePageBean{
int currentPage=1;//当前页数
public int totalPages=0;//总页数
int pageRecorders=2;//每页显示数
int totalRows=0;//总数据数
int pageStartRow=0;//每页的起始数
int pageEndRow=0;//每页的终止数
boolean hasNextPage=false;//是否有下一页
boolean hasPreviousPage=false;//是否有前一页
ArrayList arrayList;
Iterator it;
public BbsThemePageBean(ArrayList arrayList){
System.out.println("page初始化");
this.arrayList=arrayList;
totalRows=arrayList.size();
it=arrayList.iterator();
hasPreviousPage=false;
currentPage=1;
if((totalRows%pageRecorders)==0) {
totalPages=totalRows/pageRecorders;
}
else {
totalPages=totalRows/pageRecorders+1;
}
if(currentPage>=totalPages) {// 当前页数是否大于总页数
hasNextPage=false;// 如果是，没下一页
}
else {
hasNextPage=true;// 有下一页
}
if(totalRows<pageRecorders) {// 总数据数小于每页显示数
this.pageStartRow=0;// 每页起始数0
this.pageEndRow=totalRows;// 每页终止数为总数据数
}
else {
this.pageStartRow=0;
this.pageEndRow=pageRecorders;// 每页终止数为每页显示数
}
System.out.println("page初始化结束");
}
public void setCurrentPage(int currentPage) {
this.currentPage=currentPage;
}
public void setPageRecorders(int pageRecorders) {
this.pageRecorders=pageRecorders;
}
public void setHasNextPage(boolean hasNextPage) {
this.hasNextPage=hasNextPage;
}
public void setHasPreviosPage(boolean hasPreviousPage) {
this.hasPreviousPage=hasPreviousPage;
}
public String getCurrentPage() {
return this.toString(currentPage);
}
public String getTotalPages() {
return this.toString(totalPages);
}
public String getTotalRow() {
return this.toString(totalRows);
}
public int getPageRecorders() {
return pageRecorders;
}
public int getPageEndRow() {
return pageEndRow;
}
public int getPageStartRow() {
return pageStartRow;
}
public boolean isHasNextPage() {
return hasNextPage;
}
public boolean isHasPreviousPage() {
return hasPreviousPage;
}
public BbsContent[] getNextPage() {
System.out.println("getNextPage被调用");
currentPage=currentPage+1;
if((currentPage-1)>0) {//是否为第一页
hasPreviousPage=true;
}
else {
hasPreviousPage=false;
}
if(currentPage>=totalPages) {//是否为最后一页
hasNextPage=false;
}
else {
hasNextPage=true;
}
BbsContent[] bbscontent=this.getBbsContent();
System.out.println("getNextPage被调用结束");
return bbscontent;
}
public BbsContent[] getPreviousPage() {
System.out.println("getPreviousPage()被调用");
currentPage=currentPage-1;
if(currentPage==0) {
currentPage=1;
}
if(currentPage>=totalPages) {
hasNextPage=false;
}
else {
hasNextPage=true;
}
if((currentPage-1)>0) {
hasPreviousPage=true;
}
else {
hasPreviousPage=false;
}
BbsContent[] bbscontent=this.getBbsContent();
System.out.println("getPreviousPage()被调用结束");
return bbscontent;
}
public BbsContent[] getBbsContent() {
System.out.println("getBbsContent()被调用");
if(currentPage*pageRecorders<totalRows) {
pageEndRow=currentPage*pageRecorders;
pageStartRow=pageEndRow-pageRecorders;
}
else {
pageEndRow=totalRows;
pageStartRow=pageRecorders*(totalPages-1);
}
BbsContent[] bbscontent=new BbsContent[pageEndRow-pageStartRow+1];
int j=0;
for(int i=pageStartRow;i<pageEndRow;i++) {
BbsContent BbsContent=(BbsContent)arrayList.get(i);
bbscontent[j++]=BbsContent;
}
System.out.println("getBbsContent()被调用结束");
return bbscontent;
}
public String toString(int temp) {
String str=Integer.toString(temp);
return str;
}
/**
* @return totalRows
*/
public int getTotalRows() {
return totalRows;
}
/**
* @param totalRows 要设置的 totalRows
*/
public void setTotalRows(int totalRows) {
this.totalRows = totalRows;
}
}
下面action
/*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package com.domain.struts.action;
import java.io.UnsupportedEncodingException;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
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 util.BbsThemePageBean;
import util.DataConnection;
import vo.BbsContent;
/**
* MyEclipse Struts
* Creation date: 08-01-2007
*
* XDoclet definition:
* @struts.action validate="true"
* @struts.action-forward name="success" path="/bbs/themesDetail.jsp"
*/
public class ForwardThemeDetailAction extends Action {
/*
* Generated Methods
*/
/**
* Method execute
* @param mapping
* @param form
* @param request
* @param response
* @return ActionForward
*/
ArrayList arraylist=new ArrayList();
BbsThemePageBean pb;
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
// TODO Auto-generated method stub
String action=request.getParameter("action");
if(action==null||action.equals("")) {//如果为空则有title传过来，取得title
String title="";//得到穿过来的title值作为参数
try {
title=new String(request.getParameter("title").getBytes("ISO8859_1"),"UTF-8");//解决乱码
}catch(UnsupportedEncodingException e){
e.printStackTrace();
}
//System.out.println(title);
ArrayList list=new ArrayList();
String sql="select * from bbscontent where childrenTitle='"+title+"'";//条件查询
DataConnection dc=new DataConnection();
try {
ResultSet rs=dc.executeQuery(sql);
while(rs.next()) {
BbsContent bbc=new BbsContent();
bbc.setTitle(rs.getString("title"));
bbc.setAuthor(rs.getString("author"));
bbc.setPublishTime(rs.getString("publishTime"));
//System.out.println(rs.getString("title"));
//System.out.println(rs.getString("author"));
//System.out.println(rs.getString("publishTime"));
list.add(bbc);//得到list
request.getSession().setAttribute("storeList",list);//保存该list，以便下面翻页的时候使用
}
//下面是没有翻页时取得内容集合
if(list.size()==0) {//解决如果不存在记录，会出现的数组越界问题
request.setAttribute("detail",list);
return mapping.findForward("success");
}
//如果至少存在一条记录则启用分页方法
arraylist=list;
pb=new BbsThemePageBean(arraylist);
BbsContent[] bc=pb.getBbsContent();
request.setAttribute("detail",bc);
request.setAttribute("page",pb);
}catch(SQLException e) {
e.printStackTrace();
}
//下面实现分页
//System.out.println("i="+list.size());
}
else {
if(action=="nextPage"||action.equals("nextPage")) {
arraylist=(ArrayList)request.getSession().getAttribute("storeList");//直接从上面设置的session中取得list，对pb进行初始化
pb=new BbsThemePageBean(arraylist);
BbsContent[] books=pb.getNextPage();
request.setAttribute("detail",books);
request.setAttribute("page",pb);
return mapping.findForward("success");
}
if(action=="previousPage"||action.equals("previousPage")) {
arraylist=(ArrayList)request.getSession().getAttribute("storeList");//直接从上面设置的session中取得list，对pb进行初始化
pb=new BbsThemePageBean(arraylist);
BbsContent[] books=pb.getPreviousPage();
request.setAttribute("detail",books);
request.setAttribute("page",pb);
return mapping.findForward("success");
}
}
return mapping.findForward("success");
}
}
下面的jsp页面的主要部分 ThemeDetail.jsp
<logic:present name="detail" scope="request">
<logic:iterate id="de" name="detail">
<logic:present name="de">
<tr>
<td width="4%" height="22" align="center" valign="middle" bgcolor="#FFFFFF"><img src="images/em01.gif" width="19" height="19" /></td>
<td height="22" align="left" valign="middle" bgcolor="#FFFFFF"> <html:link page="/forwardTitleDetail.do" paramId="title" paramName="de" paramProperty="title"><bean:write name="de" property="title" filter="false"/></html:link></td>
<td width="11%" height="22" align="center" valign="middle" bgcolor="#FFFFFF"><bean:write name="de" property="author"/></td>
<td width="21%" height="22" align="center" valign="middle" bgcolor="#FFFFFF">暂时无回复</td>
<td width="11%" height="22" align="center" valign="middle" bgcolor="#FFFFFF"><bean:write name="de" property="publishTime"/></td>
</tr>
</logic:present>
</logic:iterate>
</logic:present>
</table>
<table width="978" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td> </td>
</tr>
<tr>
<logic:present name="page" scope="request"> <td height="25" align="center">共有主题<bean:write name="page" property="totalRows"/> 共分<bean:write name="page" property="totalPages"/> 页 当前是第<bean:write name="page" property="currentPage"/> 页 <logic:equal name="page" property="hasNextPage" value="true">
<html:link page="/forwardThemeDetail.do?action=nextPage">下一页</html:link>
</logic:equal>
<logic:equal name="page" property="hasPreviousPage" value="true">
<html:link page="/forwardThemeDetail.do?action=previousPage">上一页</html:link>
</logic:equal>
</logic:present>
注：该分页与网上其他的不同之出是，进入的页面的传了参数才进入的，所以就有通过判断传的action，判断是否需要取得参数title，并且取得的集合只在第一次取得，然后保存在session中，供翻页的时候调用，否则，需要在翻页的时候传两个参数，一个翻页的action和一个供查询用的title，那样的话比较麻烦。
该分页有很大的通用行，对无参进入页面的话只许删除少许代码即可实现。