JSP 分页

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编写一个简单的Web项目，项目结构如下：

PageBean.java 代码如下：

package com.test.po;/** * 分页  */public class PageBean {/** * 页面尺寸. */private int pageSize;/** * 当前页页码. */private int pageIndex;/** * 页面总数. */private int pageCount;/** * 总记录数. */private int totalCount;/** * 当前页首行行号. */private int firstResult;/** * 上页页码. */private int prePageIndex;/** * 下页页码. */private int nexetPageIndex;public PageBean(){this.setPageSize(10);this.setPageIndex(1);this.firstResult = 1;}/** * 初始化方法. * @param totalCount * @param pageSize */public PageBean(int pageSize,int totalCount){this.setTotalCount(totalCount);this.setPageSize(pageSize);this.getPageCount();this.setPageIndex(1);this.getFirstResult();this.getPrePageIndex();this.getNextPageIndex();}/** * 设置总行数. * @param totalCount */public void setTotalCount(int totalCount) {this.totalCount = totalCount;}/** * 设置页面尺寸. * @param pageSize */public void setPageSize(int pageSize) {this.pageSize = pageSize;}/** * 获取页面尺寸. * @return */public int getPageSize() {return pageSize;}/** * 获取页面数. * @return */public int getPageCount() {pageCount = totalCount % pageSize == 0 ? totalCount / pageSize : totalCount / pageSize + 1;return pageCount;}/** * 设置页码. * @param pageIndex */public void setPageIndex(int pageIndex) {if(pageIndex > pageCount){pageIndex = pageCount;} else if(pageIndex < 1){pageIndex = 1;}this.pageIndex = pageIndex;}/** * 获取页码. * @return */public int getPageIndex() {return pageIndex;}/** * 获取当前页首行行号. * @return */public int getFirstResult() {firstResult = (pageIndex - 1) * pageSize + 1;return firstResult;}/** * 上页. * @return */public int getPrePageIndex() {prePageIndex = pageIndex == 1 ? 1 : pageIndex - 1;return prePageIndex;}/** * 下页. * @return */public int getNextPageIndex() {nexetPageIndex = pageIndex == pageCount ? pageCount : pageIndex + 1;return nexetPageIndex;}public int getFirstPageIndex(){return 1;}public int getLastPageIndex(){return pageCount;}}

index.jsp页面中代码如下：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%@ page language="java" import="com.test.po.PageBean" %> <%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>    <base href="<%=basePath%>">    <title>My JSP 'index.jsp' starting page</title>  </head>    <body>  <%  List<String> list = new ArrayList<String>();  for(int i=0;i<100;i++ ){   list.add(String.valueOf(i + 1));  }  PageBean pb = new PageBean(10,list.size(),list);  if(request.getParameter("page.pageIndex") != null){   int pageIndex = Integer.valueOf(request.getParameter("page.pageIndex"));  pb.setPageIndex(pageIndex);  }  %>  <% for(int i=pb.getFirstResult();i<pb.getFirstResult()+ pb.getPageSize();i++){%>  <%=i %><br>  <%}%>  <a href="<%=request.getRequestURI() %>?page.pageIndex=<%=pb.getFirstPageIndex() %>">首页</a>   <a href="<%=request.getRequestURI() %>?page.pageIndex=<%=pb.getPrePageIndex() %>">上页</a>   <a href="<%=request.getRequestURI() %>?page.pageIndex=<%=pb.getNextPageIndex() %>">下页</a>   <a href="<%=request.getRequestURI() %>?page.pageIndex=<%=pb.getLastPageIndex() %>">尾页</a>   </body></html>