java web分页查询初试

ssh2分页查询初试，放着记录学习一下。

entity:student.java:

package com.zte.entity;

/**
 * 数据持久化，跟数据库的的相应的表的字段是对应的。
 * 
 * 
 */
public class Student
{

	private Integer id;

	private String name;

	private Integer age;

	private Integer score;

	private String email;

	private String phone;

	public String getEmail()
	{
		return email;
	}

	public void setEmail(String email)
	{
		this.email = email;
	}

	public String getPhone()
	{
		return phone;
	}

	public void setPhone(String phone)
	{
		this.phone = phone;
	}

	public Integer getId()
	{
		return id;
	}

	public void setId(Integer id)
	{
		this.id = id;
	}

	public String getName()
	{
		return name;
	}

	public void setName(String name)
	{
		this.name = name;
	}

	public Integer getAge()
	{
		return age;
	}

	public void setAge(Integer age)
	{
		this.age = age;
	}

	public Integer getScore()
	{
		return score;
	}

	public void setScore(Integer score)
	{
		this.score = score;
	}

}

Student.hbm.xml:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >
<hibernate-mapping package="com.zte.entity">
	<class name="Student" table="student">
		<id name="id" column="id" type="java.lang.Integer">
			<generator class="identity">
			</generator>
		</id>
		<property name="name" column="name" type="java.lang.String"></property>
		<property name="age" column="age" type="java.lang.Integer"></property>
		<property name="score" column="score" type="java.lang.Integer"></property>
		<property name="email" column="email" type="java.lang.String"></property>
		<property name="phone" column="phone" type="java.lang.String"></property>
	</class>
</hibernate-mapping>

dao层:StudentDao.java

public interface StudentDao<T>
{
	public QueryResult<T> getScrollData(int firstindex, int maxresult); // 获得分页记录
}

StudentDaoImpl.java:

public class StudentImpl<T> implements StudentDao
{

	private SessionFactory sessionFactory;// 通过spring注入数据持久化工厂(相当于spring帮你设置好了
											// 对象，直接通过getter/setter的方式获取)

    public SessionFactory getSessionFactory()
    {
        return sessionFactory;
    }

    public void setSessionFactory(SessionFactory sessionFactory)
    {
        this.sessionFactory = sessionFactory;
    }
      @Override
	public QueryResult getScrollData(int firstindex, int maxresult)
	{
		QueryResult retuslt = new QueryResult<T>();
		Query query =
				sessionFactory.getCurrentSession().createQuery("from Student");
		System.out.println("query---size---before>>>" + query.list().size());
		retuslt.setTotalrecord(query.list().size());
		query.setFirstResult(firstindex).setMaxResults(maxresult);
		System.out.println("query---size---after>>>" + query.list().size());
		retuslt.setResultlist(query.list());
		return retuslt;
	}

services层：

StudentService.java:

public interface StudentService<T>
{
	public QueryResult<T> getScrollData(int firstindex, int maxresult);
}

StudentServiceImpl.java:

public class StudentServiceImpl implements StudentService
{

	private StudentDao studentDao;// 通过spring的bean依赖注入对象
    public StudentDao getStudentDao()
    {
        return studentDao;
    }

    public void setStudentDao(StudentDao studentDao)
    {
        this.studentDao = studentDao;
    }
	@Override
	public QueryResult getScrollData(int firstindex, int maxresult)
	{
		return studentDao.getScrollData(firstindex, maxresult);
	}

Action:

BaseAction.java:

public class BaseAction extends ActionSupport implements ServletRequestAware,
		ServletResponseAware
{

	public Integer page; // 当前页信息

	public String query; // 是否为条件查询

	HttpServletRequest request;

	HttpServletResponse response;

	public Integer getPage()
	{// 获得当前页信息
		return page = (page == null || page < 1) ? 1 : page;
	}

	public void setPage(Integer page)
	{// 设置当前页信息
		this.page = page;
	}

	public String getQuery()
	{// 获得query信息
		return query;
	}

	public void setQuery(String query)
	{// 设置query信息
		this.query = query;
	}

	@Override
	public void setServletResponse(HttpServletResponse arg0)
	{
		this.response = arg0;

	}

	@Override
	public void setServletRequest(HttpServletRequest arg0)
	{
		this.request = arg0;

	}

QueryAction.java

public class QueryAction extends BaseAction 
{

	public StudentService studentService;

	public StudentService getStudentService()
	{
		return studentService;
	}

	public void setStudentService(StudentService studentService)
	{
		this.studentService = studentService;
	}

	public String query()
	{
		PageView<Student> pageView = new PageView<Student>(5, getPage());
		pageView.setQueryResult(studentService.getScrollData(
				pageView.getFirstResult(), pageView.getMaxresult()));// 查询所有记录
		request.setAttribute("pageView", pageView);// 保存到request范围
		return this.SUCCESS;
	}
}

Util,分页工具类：

public class PageIndex {
	private long startindex;
	private long endindex;
	
	public PageIndex(long startindex, long endindex) {
		this.startindex = startindex;
		this.endindex = endindex;
	}
	public long getStartindex() {
		return startindex;
	}
	public void setStartindex(long startindex) {
		this.startindex = startindex;
	}
	public long getEndindex() {
		return endindex;
	}
	public void setEndindex(long endindex) {
		this.endindex = endindex;
	}
	 
	public static PageIndex getPageIndex(long viewpagecount, int currentPage, long totalpage){
			long startpage = currentPage-(viewpagecount%2==0? viewpagecount/2-1 : viewpagecount/2);
			long endpage = currentPage+viewpagecount/2;
			if(startpage<1){
				startpage = 1;
				if(totalpage>=viewpagecount) endpage = viewpagecount;
				else endpage = totalpage;
			}
			if(endpage>totalpage){
				endpage = totalpage;
				if((endpage-viewpagecount)>0) startpage = endpage-viewpagecount+1;
				else startpage = 1;
			}
			return new PageIndex(startpage, endpage);		
	}
}

PageView.java:

public class PageView<T> {
	/** 分页数据 **/
	private List<T> records;
	/** 页码开始索引和结束索引 **/
	private PageIndex pageindex;
	/** 总页数 **/
	private long totalpage = 1;
	/** 每页显示记录数 **/
	private int maxresult = 12;
	/** 当前页 **/
	private int currentpage = 1;
	/** 总记录数 **/
	private long totalrecord;
	/** 页码数量 **/
	private int pagecode = 10;
	/** 要获取记录的开始索引 **/
	public int getFirstResult() {
		return (this.currentpage-1)*this.maxresult;
	}
	public int getPagecode() {
		return pagecode;
	}

	public void setPagecode(int pagecode) {
		this.pagecode = pagecode;
	}

	public PageView(int maxresult, int currentpage) {
		this.maxresult = maxresult;
		this.currentpage = currentpage;
	}
	
	public void setQueryResult(QueryResult<T> qr){
		setTotalrecord(qr.getTotalrecord());
		setRecords(qr.getResultlist());
	}
	
	public long getTotalrecord() {
		return totalrecord;
	}
	public void setTotalrecord(long totalrecord) {
		this.totalrecord = totalrecord;
		setTotalpage(this.totalrecord%this.maxresult==0? this.totalrecord/this.maxresult : this.totalrecord/this.maxresult+1);
	}
	public List<T> getRecords() {
		return records;
	}
	public void setRecords(List<T> records) {
		this.records = records;
	}
	public PageIndex getPageindex() {
		return pageindex;
	}
	public long getTotalpage() {
		return totalpage;
	}
	public void setTotalpage(long totalpage) {
		this.totalpage = totalpage;
		this.pageindex = PageIndex.getPageIndex(pagecode, currentpage, totalpage);
	}
	public int getMaxresult() {
		return maxresult;
	}
	public int getCurrentpage() {
		return currentpage;
	}

QueryResult.java，数据集

/**
 * 分页实体类封装
 *
 */
public class QueryResult<T> {
	/** 获得结果集 **/
	private List<T> resultlist;
	/** 获得总的记录数 **/
	private long totalrecord;
	
	public List<T> getResultlist() {
		return resultlist;
	}
	public void setResultlist(List<T> resultlist) {
		this.resultlist = resultlist;
	}
	public long getTotalrecord() {
		return totalrecord;
	}
	public void setTotalrecord(long totalrecord) {
		this.totalrecord = totalrecord;
	}
}

分页jsp：

<%@ page language="java" pageEncoding="GB18030"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<font color="blue"> 当前页:第${pageView.currentpage}页 |
	总记录数:${pageView.totalrecord}条 | 每页显示:${pageView.maxresult}条 |
	总页数:${pageView.totalpage}页</font>
<c:forEach begin="${pageView.pageindex.startindex}"
	end="${pageView.pageindex.endindex}" var="wp">
	<c:if test="${pageView.currentpage==wp}">
		<b><font color="red">第${wp}页</font></b>
	</c:if>
	<c:if test="${pageView.currentpage!=wp}">
		<a href="javascript:topage('${wp}')" class="a03">第${wp}页</a>
	</c:if>
</c:forEach>

分页的页面：

<%@ page language="java" contentType="text/html; charset=GB18030"
	pageEncoding="utf-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<script type="text/javascript">
	//到指定的分页页面
	function topage(page) {
		var form = document.forms[0];
		form.page.value = page;
		form.submit();
	}
</script>
</head>
<body>
	<form action="queryAction" method="post">
		<s:hidden name="page" />
		<s:hidden name="id" />
		<s:hidden name="name" />
		<s:hidden name="phone" />
		<s:hidden name="email" />
		<s:hidden name="age" />
		<s:hidden name="score" />
		<table width="800" border="0" cellPadding="0" cellSpacing="1"
			bgcolor="#6386d6">
			<!-- 列表标题栏 -->
			<tr bgcolor="#EFF3F7" class="TableBody1">
				<td width="10%" height="37" align="center"><b>客户编号</b></td>
				<td width="10%" height="37" align="center"><B>客户名称</B></td>
				<td width="18%" height="37" align="center"><b>联系电话</b></td>
				<td width="18%" height="37" align="center"><b>联系地址</b></td>
				<td width="18%" height="37" align="center"><b>联系人</b></td>
				<td width="18%" height="37" align="center"><b>其他信息</b></td>
				<td width="10%" height="37" align="center"><b>操作</b></td>
			</tr>
			<!-- 列表数据栏 -->
			<s:if
				test="null != #request.pageView.records && !#request.pageView.records.isEmpty() ">
				<s:iterator value="#request.pageView.records" id="entity">
					<tr bgcolor="#EFF3F7" class="TableBody1"
						onmouseover="this.bgColor = '#DEE7FF';"
						onmouseout="this.bgColor='#EFF3F7';">
						<td align="center" vAlign="center">${entity.id }</td>
						<td align="center" vAlign="center">${entity.name }</td>
						<td align="center" vAlign="center">${entity.phone }</td>
						<td align="center" vAlign="center">${entity.email }</td>
						<td align="center" vAlign="center">${entity.age }</td>
						<td align="center" vAlign="center">${entity.score }</td>
						<td align="center" vAlign="center"><a href="#"
							onclick="del('customermanage_del.do?customerNO=${entity.id}');">删除</a>
							<a href="#"
							onclick="openWin('customermanage_updateUI.do?customerNO=${entity.id}','addperson',600,200);">修改</a>
						</td>
					</tr>
				</s:iterator>
			</s:if>
			<!-- 在列表数据为空的时候，要显示的提示信息 -->
			<s:else>
				<tr>
					<td colspan="7" align="center" bgcolor="#EFF3F7" class="TableBody1"
						onmouseover="this.bgColor = '#DEE7FF';"
						onmouseout="this.bgColor='#EFF3F7';">没有找到相应的记录</td>
				</tr>
			</s:else>
		</table>
		<TABLE width="778" border=0 align=left cellPadding=0 cellSpacing=0
			borderColor=#ffffff style="FONT-SIZE: 10pt">
			<TBODY>
				<TR>
					<TD height=28 align=right vAlign=center noWrap
						background="images/list_middle.jpg">   <!-- 可以在这里插入分页导航条 -->
						<%@ include file="fenye.jsp"%>
					</TD>
				</TR>
			</TBODY>
		</TABLE>
	</form>
</body>
</html>

效果如图：

具体的工程点这：