spring2.0+hibernate3.1+struts1.2 ssh开发的简单的应用2

主要简单说明一下页面的分页

package com.hello.web;

import java.util.ArrayList;
import java.util.List;

import com.hello.model.User;

public class Page {
	//设置当前页
	private int currentPage=1;
	//总页数
	private int totalPages=0;
	//每页的记录数
	private int pageRecorders=5;
	//总共的记录数
	private int totalRows=0;
	//页面的开始记录数
	private int pageStartRow=0;
	//页面结束时的记录数
	private int pageEndRow=0;
	//是否有下一页
	private boolean hasNextPage=false;
	//是否有上一页
	private boolean hasPreviousPage=false;
	//返回数据库的集合
	private List list;
	
	public Page(){
	}
	//构造器传入数据
	public Page(List list){
		this.list=list;
		
		totalRows = list.size();
		
		hasPreviousPage=false;
		currentPage=1;
		if((totalRows%pageRecorders)==0){
			totalPages = totalRows/pageRecorders;
		}else{
			totalPages = totalRows/pageRecorders+1;
		}
		//判断是否有下页
		if(currentPage >=totalPages){
			hasNextPage=false;
		}else{
			hasNextPage=true;
		}
		
		if(totalRows<pageRecorders){
			this.pageStartRow=0;
			this.pageEndRow=totalRows;
		}else{
			this.pageStartRow=0;
			this.pageEndRow=pageRecorders;
		}
	}
	public String getCurrentPage() {
		return this.toString(currentPage);
	}
	private String toString(int temp) {
		// TODO Auto-generated method stub
		return Integer.toString(temp);
	}

	public void setCurrentPage(int currentPage) {
		this.currentPage = currentPage;
	}
	public String  getTotalPages() {
		return this.toString(totalPages);
	}
	public void setTotalPages(int totalPages) {
		this.totalPages = totalPages;
	}
	public int getPageRecorders() {
		return pageRecorders;
	}
	public void setPageRecorders(int pageRecorders) {
		this.pageRecorders = pageRecorders;
	}
	public String getTotalRows() {
		return this.toString(totalRows);
	}
	public void setTotalRows(int totalRows) {
		this.totalRows = totalRows;
	}
	public int getPageStartRow() {
		return pageStartRow;
	}
	public void setPageStartRow(int pageStartRow) {
		this.pageStartRow = pageStartRow;
	}
	public int getPageEndRow() {
		return pageEndRow;
	}
	public void setPageEndRow(int pageEndRow) {
		this.pageEndRow = pageEndRow;
	}
	public boolean isHasNextPage() {
		return hasNextPage;
	}
	public void setHasNextPage(boolean hasNextPage) {
		this.hasNextPage = hasNextPage;
	}
	public boolean isHasPreviousPage() {
		return hasPreviousPage;
	}
	public void setHasPreviousPage(boolean hasPreviousPage) {
		this.hasPreviousPage = hasPreviousPage;
	}
	//取得首页
	public void getFirstPage(){
		currentPage=1;
		hasPreviousPage=false;
		if(currentPage>=totalPages){
			hasNextPage=false;
		}else{
			hasNextPage = true;
		}
	}
	//取得下一页
	public void getNextPage(){
		currentPage=currentPage+1;
		if((currentPage-1)>0){
			hasPreviousPage=true;
		}else{
			hasPreviousPage=false;
		}
		
		if(currentPage>=totalPages){
			hasNextPage=false;
		}else{
			hasNextPage=true;
		}
	}
	//取得前一页
	public void getPreviousPage(){
		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;
		}
	}
	//取得尾页
	public void getLastPage(){
		currentPage =totalPages;
		if(currentPage==0){
			currentPage=1;
		}
		hasNextPage=false;
		if((currentPage-1)>0){
			hasPreviousPage=true;
		}else{
			hasPreviousPage=false;
		}
	}
	//跳转页面
	public void setGotoPage(int gotoPage){
		this.currentPage = gotoPage;
		hasNextPage=true;
		hasPreviousPage=true;
		if(currentPage<=1){
			currentPage=1;
			hasPreviousPage=false;
			hasNextPage=true;
		}
		
		if(currentPage >= totalPages){
			currentPage=totalPages;
			hasPreviousPage=true;
			hasNextPage=false;
		}
	}
	//取得页面list的信息
	public List<User> getPageList(){
		//判断是否是最后一页
		if(currentPage*pageRecorders<totalRows){
			pageEndRow = currentPage*pageRecorders;
			pageStartRow = pageEndRow-pageRecorders;
		}else{
			pageEndRow = totalRows;
			pageStartRow = pageRecorders*(totalPages-1);
		}
		List<User> testList = new ArrayList<User>();
		int j=0;
		for(int i=pageStartRow;i<pageEndRow;i++){
			User user = (User) list.get(i);
			testList.add(j, user);
			j++;
		}
		return testList;
	}
	
	public void setList(List list) {
		this.list = list;
	}
		
}

页面的代码

<%@ page language="java" pageEncoding="gbk"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %>
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %>
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
	<head>
		<title>LIST DATA</title>
	</head>

	<body>
		
		<table border="1">
			<Tr>
				<td> 
					id 
				</td>
				<td>
					name
				</td>
				<td>
					email
				</td>
				<td>
					desn
				</td>
				<td>
					edit
				</td>
				<td>
					delete
				</td>
			</Tr>
			<c:forEach items="${requestScope['users']}" var="user">
			<tr>
				<td>
				<c:out value="${user.id}"></c:out>
				</td>
				<td>
				<c:out value="${user.name}"></c:out>
				</td>
				<td>
				<c:out value="${user.email}"></c:out>
				</td>
				<td>
				<c:out value="${user.descn}"></c:out>
				</td>
				<td>
					<a
					href="<c:url value="/user.do?method=edit&id=${user.id}"/>">edit</a>
				</td>
				<td>
					<a
					href="<c:url value="/user.do?method=delete&id=${user.id}"/>">delete</a>
				</td>
				
			</tr>
			</c:forEach>
		</Table> <br>
		<html:link page="/user.do?method=list&action=firstPage">首页</html:link>
		<logic:equal name="page" property="hasPreviousPage" value="true">
			<html:link page="/user.do?method=list&action=previousPage">上一页</html:link>
		</logic:equal>
		<logic:equal name="page" property="hasPreviousPage" value="false">
			上一页
		</logic:equal>
		<logic:equal name="page" property="hasNextPage" value="true">
			<html:link page="/user.do?method=list&action=nextPage">下一页</html:link>
		</logic:equal>
		<logic:equal name="page" property="hasNextPage" value="false">
			 下一页 
		</logic:equal>
		<html:link page="/user.do?method=list&action=lastPage">尾页</html:link>
		共有数据
		<bean:write name="page" property="totalRows"/>
		条；共分
		<bean:write name="page" property="totalPages"/>
		页；当前是第
		<bean:write name="page" property="currentPage"/>
		页
		<br><button onclick="location.href='pages/edit.jsp'">add</button>

	</body>
</html>

UserAction,设置页面
只有list方法，其他的方法在代码里

public class UserAction extends DispatchAction {
private Page page;
	private UserService userService;

	public void setUserService(UserService userService) {
		this.userService = userService;
	}

	public ActionForward list(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		List<User> list;
		String action = null;
		action = request.getParameter("action");
		if (action == null || "action".equals(action)) {
			list = userService.loadAll();
			page = new Page(list);
			list = page.getPageList();
			request.setAttribute("users", list);
			request.setAttribute("page", page);
		} else {
			if (action == "firstPage" || action.equals("firstPage")) {
				page.getFirstPage();
				list = page.getPageList();
				request.setAttribute("users", list);
				request.setAttribute("page", page);
			}
			if (action == "nextPage" || action.equals("nextPage")) {
				page.getNextPage();
				list = page.getPageList();
				request.setAttribute("users", list);
				request.setAttribute("page", page);
			}
			if (action == "previousPage" || action.equals("previousPage")) {
				page.getPreviousPage();
				list = page.getPageList();
				request.setAttribute("users", list);
				request.setAttribute("page", page);
			}
			if (action == "lastPage" || action.equals("lastPage")) {
				page.getLastPage();
				list = page.getPageList();
				request.setAttribute("users", list);
				request.setAttribute("page", page);
			}

		}
		return mapping.findForward("list");
	}

----------------------
}