使用pager进行分页

pager jar网址:http://java2s.com/Code/Jar/t/Downloadtaglibspagejar.htm

package com.binary.entity;

import java.util.List;

public class PageModel<T> {

	private long total;//页数
private List<T> dates;//当前页的数据
public long getTotal() {
return total;
}
public void setTotal(long total) {
this.total = total;
}
public List<T> getDates() {
return dates;
}
public void setDates(List<T> dates) {
this.dates = dates;
} }
package com.binary.entity;

public class Pager {

	private int offset;//offset表示从那一页开始记录

	public int getOffset() {
return offset;
} public void setOffset(int offset) {
this.offset = offset;
} }
package com.binary.entity;

import java.util.HashSet;
import java.util.Set; /**
* User entity. @author MyEclipse Persistence Tools
*/ public class User implements java.io.Serializable { // Fields private Integer id;
private String uname;
private String upass;
private String meun; // Constructors /** default constructor */
public User() {
} /** minimal constructor */
public User(String meun) {
this.meun = meun;
} /** full constructor */
public User(String uname, String upass, String meun, Set meuns) {
this.uname = uname;
this.upass = upass;
this.meun = meun;
} // Property accessors public Integer getId() {
return this.id;
} public void setId(Integer id) {
this.id = id;
} public String getUname() {
return this.uname;
} public void setUname(String uname) {
this.uname = uname;
} public String getUpass() {
return this.upass;
} public void setUpass(String upass) {
this.upass = upass;
} public String getMeun() {
return this.meun;
} public void setMeun(String meun) {
this.meun = meun;
} }
import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration; import com.binary.entity.PageModel;
import com.binary.entity.User; public class UserDao { public PageModel<User> getUsers(int offset,int maxResult) {
Configuration cf=new Configuration().configure();
SessionFactory sf=cf.buildSessionFactory();
Session session=sf.openSession();
Query q= session.createQuery("from User");
PageModel<User> users=new PageModel<User>();
users.setTotal(q.list().size());
q.setFirstResult(offset);
q.setMaxResults(maxResult); users.setDates(q.list());
session.close();
return users;
}
}
package com.dan.biz;

import com.binary.entity.PageModel;
import com.binary.entity.User;
import com.dan.dao.UserDao; public class UserBiz { public PageModel<User> getUsers(int offset,int maxResult) {
return new UserDao().getUsers(offset, maxResult);
}
}
package com.dan.action;

import org.apache.struts2.ServletActionContext;

import com.binary.entity.PageModel;
import com.binary.entity.Pager;
import com.binary.entity.User;
import com.dan.biz.UserBiz;
import com.opensymphony.xwork2.ActionSupport; public class UserAction extends ActionSupport { private Pager pager=new Pager();//存放偏移量
private int numPerPage=2;//每页的数据量
private long totalCount;//总页数
private String str; public String getStr() {
return str;
} public void setStr(String str) {
this.str = str;
} public Pager getPager() {
return pager;
} public void setPager(Pager pager) {
this.pager = pager;
} public int getNumPerPage() {
return numPerPage;
} public void setNumPerPage(int numPerPage) {
this.numPerPage = numPerPage;
} public long getTotalCount() {
return totalCount;
} public void setTotalCount(long totalCount) {
this.totalCount = totalCount;
} public String execute() {
System.out.println(str);
UserBiz biz=new UserBiz();
PageModel<User> users=biz.getUsers(pager.getOffset(), numPerPage);
totalCount=users.getTotal();
ServletActionContext.getRequest().setAttribute("user", users.getDates());
return SUCCESS;
}
}
page.tag封装成tag标签
<%@tag pageEncoding="utf-8" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="pg" uri="/WEB-INF/lib/pager-taglib.jar" %>
<%@attribute name="color" required="true" %>
<%@attribute name="totalCount" required="true" rtexprvalue="true" %>
<%@attribute name="numPerPage" required="true" rtexprvalue="true" %> <pg:pager items="${totalCount }" url="user" export="currentPageNumber=pageNumber"
maxPageItems="${numPerPage }" maxIndexPages="5"> <pg:first>
<a href="${pageUrl }">首页</a>
</pg:first>
<pg:prev>
<a href="${pageUrl }">前页</a>
</pg:prev>
<pg:pages>
<c:choose>
<c:when test="${pageNumber == currentPageNumber}">
<font color="red">${pageNumber }</font>
</c:when>
<c:otherwise>
<a href="${pageUrl }">${pageNumber }</a>
</c:otherwise>
</c:choose> </pg:pages>
<pg:next>
<a href="${pageUrl }&str=aaaa">下一页</a> </pg:next>
<pg:last>
<a href="${pageUrl }">尾页</a>
</pg:last>
${pageUrl } </pg:pager>
jsp代码
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="pg" uri="/WEB-INF/lib/pager-taglib.jar" %>
<%@ taglib prefix="page" tagdir="/WEB-INF/tags" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>"> <title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head> </head>
<body>
<c:forEach items="${user }" var="u">
${u.uname }
</c:forEach> <page:page color="red" numPerPage="${numPerPage }" totalCount="${totalCount }"></page:page>
</body>
</html>
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