struts+hibernate分页

新建表

<!--<br><br>Code highlighting produced by Actipro CodeHighlighter (freeware)<br>http://www.CodeHighlighter.com/<br><br>-->
DROP DATABASE IF EXISTS `wjcms`;
CREATE DATABASE `wjcms` /* !40100DEFAULTCHARACTERSETgb2312 */ ;
USE `wjcms`;

#
# Table structure for table t_article
#

CREATE TABLE `t_article`(
`a_id` int ( 11 ) NOT NULL auto_increment,
`a_sort` int ( 11 ) NOT NULL default ' 0 ' ,
`a_title` varchar ( 50 ) default NULL ,
`a_body` text ,
`a_author` varchar ( 11 ) default '' ,
`a_hit` int ( 11 ) NOT NULL default ' 0 ' ,
`c_id` int ( 11 ) default ' 0 ' ,
`a_date` varchar ( 20 ) default NULL ,
PRIMARY KEY (`a_id`)
)

实体

public class articleVO {
private int a_id;
private int a_sort;
private int a_hit;
private int c_id;
private String a_title;
private String a_body;
private String a_author;
private String a_date;
// getter setter


新建page.java

<!--<br><br>Code highlighting produced by Actipro CodeHighlighter (freeware)<br>http://www.CodeHighlighter.com/<br><br>--> package page.dal;

public class page{
private int totalRows; // 总行数
private int pageSize = 10 ; // 每页显示的行数
private int currentPage; // 当前页号
private int totalPages; // 总页数
private int startRow; // 当前页在数据库中的起始行

public page( int _totalRows){
totalRows = _totalRows;
totalPages = totalRows / pageSize;
int mod = totalRows % pageSize;
if (mod > 0 ){
totalPages ++ ;
}
currentPage = 1 ;
startRow = 0 ;
}

public int getStartRow(){
return startRow;
}

public int getTotalPages(){
return totalPages;
}

public int getCurrentPage(){
return currentPage;
}

public int getPageSize(){
return pageSize;
}

public void setTotalRows( int totalRows){
this .totalRows = totalRows;
}

public void setStartRow( int startRow){
this .startRow = startRow;
}

public void setTotalPages( int totalPages){
this .totalPages = totalPages;
}

public void setCurrentPage( int currentPage){
this .currentPage = currentPage;
}

public void setPageSize( int pageSize){
this .pageSize = pageSize;
}

public int getTotalRows(){
return totalRows;
}

public void first(){
currentPage = 1 ;
startRow = 0 ;
}

public void previous(){
if (currentPage == 1 ){
return ;
}
currentPage -- ;
startRow = (currentPage - 1 ) * pageSize;
}

public void next(){
if (currentPage < totalPages){
currentPage ++ ;
}
startRow = (currentPage - 1 ) * pageSize;
}

public void last(){
currentPage = totalPages;
startRow = (currentPage - 1 ) * pageSize;
}

public void refresh( int _currentPage){
currentPage = _currentPage;
if (currentPage > totalPages){
last();
}
}

}

新建 pageHelp.java

<!--<br><br>Code highlighting produced by Actipro CodeHighlighter (freeware)<br>http://www.CodeHighlighter.com/<br><br>--> package page.dal;
import javax.servlet.http. * ;

public class PagerHelp{
public static pagegetPager(HttpServletRequesthttpServletRequest, int totalRows){

// 定义pager对象，用于传到页面
pagepager = new page(totalRows);

// 从Request对象中获取当前页号
StringcurrentPage = httpServletRequest.getParameter( " currentPage " );

// 如果当前页号为空，表示为首次查询该页
// 如果不为空，则刷新page对象，输入当前页号等信息
if (currentPage != null ){
pager.refresh(Integer.parseInt(currentPage));
}

// 获取当前执行的方法，首页，前一页，后一页，尾页。
StringpagerMethod = httpServletRequest.getParameter( " pageMethod " );

if (pagerMethod != null ){
if (pagerMethod.equals( " first " )){
pager.first();
} else if (pagerMethod.equals( " previous " )){
pager.previous();
} else if (pagerMethod.equals( " next " )){
pager.next();
} else if (pagerMethod.equals( " last " )){
pager.last();
}
}
return pager;
}

}

新建 util.java

<!--<br><br>Code highlighting produced by Actipro CodeHighlighter (freeware)<br>http://www.CodeHighlighter.com/<br><br>--> package page.dal;
import net.sf.hibernate.Query;
import net.sf.hibernate.cfg.Configuration;
import java.util.List;
import net.sf.hibernate.HibernateException;
import net.sf.hibernate.SessionFactory;
import net.sf.hibernate.Session;
import java.util. * ;
public class util{
public util(){
}
private Sessionss = null ;
public SessiongetSession()
{
// Configurationconfig=null;
SessionFactorysessionFactory;
try {
Configurationcfg = new Configuration();
sessionFactory = cfg.addClass(articleVO. class ).
buildSessionFactory();
// SessionFactorysessionFactory=config.buildSessionFactory();
ss = sessionFactory.openSession();
return ss;
} catch (HibernateExceptionex){
System.out.print( " getsession出错了。。 " + ex.getMessage());
return null ;
}
}

public int getCount()
{
Stringsql = " selectcount(*)fromarticleVO " ;
this .getSession();

try {
// ss.createQuery("selectcount(a)ascontfromarticleVOa");
int rows = ((Integer)ss.iterate(sql).next()).intValue();
ss.flush();
return rows;

} catch (HibernateExceptionex){
System.out.print( " ex:: " + ex.getMessage());
return 0 ;
}


}

public CollectiongetList( int pagesize, int currow) throws HibernateException{
CollectionvehicleList = null ;
this .getSession();
Queryq = ss.createQuery( " fromarticleVO " );
q.setFirstResult(currow);
q.setMaxResults(pagesize);
vehicleList = q.list();
ss.flush();
return vehicleList;
}

}

新建 struts PageAction.java

<!--<br><br>Code highlighting produced by Actipro CodeHighlighter (freeware)<br>http://www.CodeHighlighter.com/<br><br>--> package page.dal;

import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForm;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.Action;
import page.dal. * ;
import java.util. * ;
import net.sf.hibernate. * ;

public class pageAction extends Action{
public ActionForwardexecute(ActionMappingmapping,ActionFormform,
HttpServletRequestrequest,
HttpServletResponseresponse){
CollectionclInfos = null ; // 用于输出到页面的记录集合
int totalRows; // 记录总行数
utildal = new util();
totalRows = dal.getCount();
System.out.print( " 总行数== " + totalRows);
pagep = PagerHelp.getPager(request,totalRows);
try {
clInfos = dal.getList(p.getPageSize(),p.getStartRow());

} catch (HibernateExceptionex){
System.out.print( " action里的错误= " + ex.getMessage());
}
request.setAttribute( " page " ,p);
request.setAttribute( " list " ,clInfos);
return mapping.findForward( " page " );
// pageFormpageForm=(pageForm)form;
// thrownewjava.lang.UnsupportedOperationException(
// "Method$execute()notyetimplemented.");
}
}

前台页面

<!--<br><br>Code highlighting produced by Actipro CodeHighlighter (freeware)<br>http://www.CodeHighlighter.com/<br><br>--> <% @tagliburi = " /WEB-INF/struts-tiles.tld " prefix = " tiles " %>
<% @tagliburi = " /WEB-INF/struts-nested.tld " prefix = " nested " %>
<% @tagliburi = " /WEB-INF/struts-logic.tld " prefix = " logic " %>
<% @tagliburi = " /WEB-INF/struts-bean.tld " prefix = " bean " %>
<% @tagliburi = " /WEB-INF/struts-html.tld " prefix = " html " %>
<% @pagecontentType = " text/html;charset=GBK " %>
< html:html >
< head >
< title >
page
</ title >
</ head >
< body >
< table align ="center" border ="2" >
< tr >
< th > a_title </ th >
< th > a_body </ th >
< th > a_a_date </ th >
< th > a_author </ th >
</ tr >

< logic:iterate id ="listd" name ="list" >
< tr >
< td >
< bean:write name ="listd" property ="a_title" />
</ td >
< td >
< bean:write name ="listd" property ="a_author" />
</ td >
< td >
< bean:write name ="listd" property ="a_date" />
</ td >
< td >
< bean:write name ="listd" property ="a_date" />
</ td >
</ tr >
</ logic:iterate >

</ table >

第 < bean:write name ="page" property ="currentPage" /> 页
共 < bean:write name ="page" property ="totalPages" /> 页
< html:link action ="/pageAction.do?pageMethod=first"
paramName ="page" paramProperty ="currentPage" paramId ="currentPage" > 首页 </ html:link >
< html:link action ="/pageAction.do?pageMethod=previous"
paramName ="page" paramProperty ="currentPage" paramId ="currentPage" > 上一页 </ html:link >
< html:link action ="/pageAction.do?pageMethod=next"
paramName ="page" paramProperty ="currentPage" paramId ="currentPage" > 下一页 </ html:link >

< html:link action ="/pageAction.do?pageMethod=last"
paramName ="page" paramProperty ="currentPage" paramId ="currentPage" > 尾页 </ html:link >
</ body >
</ html:html >

启动浏览 pageAction.do 运行OK。



****************************************************************************************


配置文件

<!--<br><br>Code highlighting produced by Actipro CodeHighlighter (freeware)<br>http://www.CodeHighlighter.com/<br><br>--> <? xmlversion="1.0"encoding="UTF-8" ?>

<! DOCTYPEhibernate-mappingPUBLIC
"-//Hibernate/HibernateMappingDTD2.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd" >
< hibernate-mapping >

< class name ="page.dal.articleVO" table ="t_article" >


< id name ="a_id" column ="a_id" unsaved-value ="0" >
< generator class ="native" />
</ id >
< property name ="c_id" column ="c_id" />
< property name ="a_title" column ="a_title" />
< property name ="a_sort" column ="a_sort" />
< property name ="a_date" column ="a_date" />
< property name ="a_body" column ="a_body" />
< property name ="a_hit" column ="a_hit" />
< property name ="a_author" column ="a_author" />


</ class >

</ hibernate-mapping >

<!--<br><br>Code highlighting produced by Actipro CodeHighlighter (freeware)<br>http://www.CodeHighlighter.com/<br><br>-->
hibernate.dialectnet.sf.hibernate.dialect.MySQLDialect
hibernate.connection.driver_classorg.gjt.mm.mysql.Driver
hibernate.connection.urljdbc:mysql://localhost: 3306 /wjcms
hibernate.connection.usernameroot
hibernate.connection.password
hibernate.connection.pool_size 1
hibernate.proxool.pool_aliaspool1
hibernate.show_sqltrue
hibernate.max_fetch_depth 1
hibernate.cache.use_query_cachetrue