struts+displaytag外部分页
pageList 此类现实paginatedList接口，是display支持的外部分页接口 Java code package com.yourcompany.proxy; import java.util.List; import org.displaytag.pagination.PaginatedList; import org.displaytag.properties.SortOrderEnum; /** */ /** * 分页列表 * *
此类现实paginatedList接口，是display支持的外部分页接口
Java code
package com.yourcompany.proxy;
import java.util.List;
import org.displaytag.pagination.PaginatedList;
import org.displaytag.properties.SortOrderEnum;
/** */
/**
* 分页列表
*
* @author
*
*/
public class PageList implements PaginatedList {
/** */
/**
* 每页的列表
*/
private List list;
/** */
/**
* 当前页码
*/
private int pageNumber = 1;
/** */
/**
* 每页记录数 page size
*/
private int objectsPerPage = 15;
/** */
/**
* 总记录数
*/
private int fullListSize = 0;
private String sortCriterion;
private SortOrderEnum sortDirection;
private String searchId;
public List getList() {
return list;
}
public void setList(List list) {
this.list = list;
}
public int getPageNumber() {
return pageNumber;
}
public void setPageNumber(int pageNumber) {
this.pageNumber = pageNumber;
}
public int getObjectsPerPage() {
return objectsPerPage;
}
public void setObjectsPerPage(int objectsPerPage) {
this.objectsPerPage = objectsPerPage;
}
public int getFullListSize() {
return fullListSize;
}
public void setFullListSize(int fullListSize) {
this.fullListSize = fullListSize;
}
public String getSortCriterion() {
return sortCriterion;
}
public void setSortCriterion(String sortCriterion) {
this.sortCriterion = sortCriterion;
}
public SortOrderEnum getSortDirection() {
return sortDirection;
}
public void setSortDirection(SortOrderEnum sortDirection) {
this.sortDirection = sortDirection;
}
public String getSearchId() {
return searchId;
}
public void setSearchId(String searchId) {
this.searchId = searchId;
}
}
action
Java code
/*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package com.yourcompany.struts.action;
import java.util.List;
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 com.yourcompany.DBO.UserDBO;
import com.yourcompany.proxy.PageList;
/**
* MyEclipse Struts
* Creation date: 03-09-2009
*
* XDoclet definition:
* @struts.action validate="true"
* @struts.action-forward name="show" path="/test.jsp"
*/
public class PageAction extends Action {
/*
* Generated Methods
*/
// 设置每页显示数据数
private final int PAGE_SIZE = 15;
/**
* Method execute
* @param mapping
* @param form
* @param request
* @param response
* @return ActionForward
*/
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
// TODO Auto-generated method stub
UserDBO dbo=new UserDBO();
// 获取当前页数，displaytag通过参数"page"传递这个值
int pageNumber;
if (request.getParameter("page") != null
&& !"".equals(request.getParameter("page"))) {
pageNumber = Integer.parseInt(request.getParameter("page"));
} else {
pageNumber = 1;
}
PageList pageList = new PageList();
List pages = dbo.getUserList(PAGE_SIZE, (pageNumber-1)*PAGE_SIZE);
// 设置当前页数
pageList.setPageNumber(pageNumber);
// 设置当前页列表
pageList.setList(pages);
// 设置page size
pageList.setObjectsPerPage(PAGE_SIZE);
// 设置总页数
pageList.setFullListSize(dbo.getUserSize());
request.setAttribute("pageList", pageList);
return mapping.findForward("show");
}
}
UserDBO
Java code
package com.yourcompany.DBO;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;
import com.sql.SqlDBO;
import com.yourcompany.bean.FansBean;
public class UserDBO extends SqlDBO {
ResultSet rs = null;
public List getUserList(int start,int end) {
List userList = new ArrayList();
this.DBConnection();
String sql="select top "+start+" * from users where userID not in(select top "+end+" userID from users )";
System.out.println(sql);
long starts=System.currentTimeMillis();
rs = this.Query(sql);
long ends=System.currentTimeMillis();
System.out.println("花费时间："+(ends-starts)+"毫秒");
try {
while (rs.next()) {
FansBean fans = new FansBean();
fans.setFans_id(rs.getString("userID").trim());
fans.setFans_name(rs.getString("userName").trim());
fans.setPassword(rs.getString("password").trim());
fans.setFans_sex(rs.getString("sex").trim());
fans.setFans_date(rs.getString("userDate").trim());
fans.setFans_city(rs.getString("userCity").trim());
fans.setFans_Email(rs.getString("userEmail").trim());
userList.add(fans);
}
} catch (Exception e) {
System.out.println("读取数据出错：" + e);
}
this.close();
return userList;
}
public int getUserSize(){
int n=0;
this.DBConnection();
long start=System.currentTimeMillis();
String sql="select count(userID) as sum from users";
rs=this.Query(sql);
try{
while(rs.next()){
n=Integer.parseInt(rs.getString("sum"));
break;
}
}catch(Exception e){
System.out.println("取得记录总数出错"+e);
}
this.close();
long end=System.currentTimeMillis();
System.out.println("花费时间："+(end-start)+"毫秒");
System.out.println("记录总数"+n);
return n;
}
}
jsp页面
HTML code
<%@ page language="java" import="java.util.*" pageEncoding="GB2312"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<%@ taglib uri="http://displaytag.sf.net/el" prefix="display"%>
<html>
<head>
<title>My JSP 'test.jsp' starting page</title>
<style type="text/css">
.table {
border: 1px solid #74B3DC;
color: #000;
background: #fff;
width: 99.7% !important;
width: 99.5%;
}
.table td,.table th {
border: 1px solid #e0e0e0;
border-left: 0px;
border-top: 0px;
padding: 0.2em;
}
.table thead th {
border: 1px solid #e0e0e0;
border-left: 0px;
border-top: 0px;
text-align: left;
font-size: 1em;
font-weight: bold;
background: #d7e9f5;
}
</style>
</head>
<body>
<display:table name="pageList" id="row" class="table" pagesize="20" export="true"
decorator="org.displaytag.decorator.TotalTableDecorator"
requestURI="${pageContext.request.contextPath}/page.do">
<display:column property="fans_id" title="编号" />
<display:column property="fans_name" title="姓名" />
<display:column property="fans_sex" title="性别" />
</display:table>
</body>
</html>
