struts2 分页求解

<% int totalPage = (Integer)request.getAttribute("totalPage");
        %>
                </tr>
                  <s:url id="url_pre" value="show.action">
                     <s:param name="pageNow" value="pageNow-1"></s:param>
                  </s:url>
                 <s:url id="url_next" value="show.action">
                    <s:param name="pageNow" value="pageNow+1"></s:param>
                 </s:url>
                 <s:url id="first" value="show.action">
                    <s:param name="pageNow" value="1"></s:param>
                 </s:url>
                  <s:url id="last" value="show.action">
                    <s:param name="pageNow" value="<%=totalPage%>"></s:param>
                 </s:url>
以上是struts2 的分页  其他功能都实现了
                      怎么才能看到最后一页???(一共页数已经统计出来 )怎么在JSP中把action中的totalPage 传来

解决方案 »

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totalPage是总的页数吧
int totalPages = 1;

String sql = "select count(*) from tablename where XX = " + XX;
        //用上面语句计算总共有多少条记入totalRecords

totalPages = (totalRecords + PAGE_SIZE - 1)/PAGE_SIZE;//计算总页数
request.setAttribute("totalPage",totalPages);
在action中搞个私有变量
private int totalPages;跟上get set方法在action中附上值，就可以在页面上直接用了，不需要传，struts2自动帮你传了页面上：<s:property value="totalPages" />
private int totalPages;
public void setTotalPages(int totalPages) {
this.totalPages= totalPages;
} public int getTotalPages() {
return totalPages;
}
<s:property value="totalPages" />
SSH(建议通用分页标签)--->PageDemo:简单的示例：1、三个页面代码
==================================================================
<1>===============index.jsp============
<%@ page language="java" pageEncoding="UTF-8"%><%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>
<%@ 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-tiles" prefix="tiles" %>
<html:html lang="true">
  <head>
    <html:base />
    <title>index.jsp</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">
  </head>

  <body>
    <html:form action="/score?opt=toList" method="post">
      <table border="0">

        <tr>
          <td colspan="2" align="center"><html:submit value="提交" /></td>
        </tr>
      </table>
    </html:form>
  </body>
</html:html><2>===============List.jsp===============
<%@ page language="java" pageEncoding="UTF-8"%><%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>
<%@ 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-tiles" prefix="tiles" %>
<%@ taglib tagdir="/WEB-INF/tags/" prefix="my" %><html:html lang="true">
  <head>
    <html:base />
    <title>List.jsp</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">
<style type="text/css">
table{
border-width;1px;
border-style:solid;
border-color:green;
}
td{
border-width;1px;
border-style:solid;
border-color:green;
}

</style>
  </head>

  <body>
    <html:form action="/userInfo?opt=toList" method="post">
      <table border="0" width="300">
         <tr>
         <td>编号</td><td>姓名</td><td>余额</td>
         </tr>
         <logic:iterate id="user" collection="${bean.date}">
<tr>
<td>${user.userId }</td>
<td>${user.userName }</td>
<td>${user.balance }</td>
</tr>
         </logic:iterate>
      </table>
      <my:myPage cpage="${bean.currentPage}" allNum="${bean.allNum}" allPage="${bean.allPage}" pageNum="${bean.pageNum}"/>
    </html:form>
  </body>
</html:html><3>========ScoreList.jsp=======
<%@ page language="java" pageEncoding="UTF-8"%><%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>
<%@ 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-tiles" prefix="tiles" %>
<%@ taglib tagdir="/WEB-INF/tags/" prefix="my" %><html:html lang="true">
  <head>
    <html:base />
    <title>List.jsp</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">
<style type="text/css">
table{
border-width;1px;
border-style:solid;
border-color:green;
}
td{
border-width;1px;
border-style:solid;
border-color:green;
}

</style>
  </head>

  <body>
    <html:form action="/score?opt=toList" method="post">
      <table border="0" width="300">
         <tr>
         <td>编号</td><td>成绩</td>
         </tr>
         <logic:iterate id="ss" collection="${bean.date}">
<tr>
<td>${ss.cid }</td>
<td>${ss.score }</td>
</tr>
         </logic:iterate>
      </table>
      <my:myPage cpage="${bean.currentPage}" allNum="${bean.allNum}" allPage="${bean.allPage}" pageNum="${bean.pageNum}"/>
    </html:form>
  </body>
</html:html>
==================================================================
2/ entity 类：
1、===========Score========
package com.myweb.entity;/**
* Score generated by MyEclipse Persistence Tools
*/public class Score implements java.io.Serializable { // Fields private Integer cid; private UserInfo userInfo; private Double score; // Constructors /** default constructor */
public Score() {
} /** full constructor */
public Score(UserInfo userInfo, Double score) {
this.userInfo = userInfo;
this.score = score;
} // Property accessors public Integer getCid() {
return this.cid;
} public void setCid(Integer cid) {
this.cid = cid;
} public UserInfo getUserInfo() {
return this.userInfo;
} public void setUserInfo(UserInfo userInfo) {
this.userInfo = userInfo;
} public Double getScore() {
return this.score;
} public void setScore(Double score) {
this.score = score;
}}
2、=============UserInfo=================
package com.myweb.entity;import java.util.HashSet;
import java.util.Set;/**
* UserInfo generated by MyEclipse Persistence Tools
*/public class UserInfo implements java.io.Serializable { // Fields private String userId; private String userName; private Integer balance; private Set scores = new HashSet(0); // Constructors /** default constructor */
public UserInfo() {
} /** minimal constructor */
public UserInfo(String userName, Integer balance) {
this.userName = userName;
this.balance = balance;
} /** full constructor */
public UserInfo(String userName, Integer balance, Set scores) {
this.userName = userName;
this.balance = balance;
this.scores = scores;
} // Property accessors public String getUserId() {
return this.userId;
} public void setUserId(String userId) {
this.userId = userId;
} public String getUserName() {
return this.userName;
} public void setUserName(String userName) {
this.userName = userName;
} public Integer getBalance() {
return this.balance;
} public void setBalance(Integer balance) {
this.balance = balance;
} public Set getScores() {
return this.scores;
} public void setScores(Set scores) {
this.scores = scores;
}}=========================================================================
1、DAo Interface 接口方法
void ListByPage(String hql,PageBean bean);
2、实现接口类 DaoImpl：
package com.myweb.dao.impl;import java.util.List;import org.hibernate.Query;import com.myweb.dao.CommonDao;
import com.myweb.util.PageBean;
import org.hibernate.*;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
public class CommonDaoImpl extends HibernateDaoSupport implements CommonDao { public void ListByPage(String hql, PageBean bean) {
if (null==hql){
return ;
}
Session session=this.getSession();
Query query = session.createQuery(hql);
int start=bean.getPageNum()*(bean.getCurrentPage()-1);//开始取数据行
query.setFirstResult(start);
query.setMaxResults(bean.getPageNum());//每次去多少行
List ret = query.list();
bean.setDate(ret);//设置每次要去的数据集合

String queryString = "";
if (hql.toUpperCase().indexOf("SELECT") != -1) {
int i = query.getQueryString().toUpperCase().indexOf("FROM");
queryString = "Select count(*) " + hql.substring(i,hql.length());
} else {
queryString = "Select count(*) " + hql;
}
// 去掉ORDER BY 的部分
int j = queryString.toUpperCase().lastIndexOf("ORDER");
if (j!=-1){
queryString = queryString.substring(0, j);
}
Query cquery = session.createQuery(queryString);
int allnums=Integer.parseInt(cquery.uniqueResult().toString());
bean.setAllNum(allnums);//设置总行数
int allpages=allnums%bean.getPageNum()==0?allnums/bean.getPageNum():allnums/bean.getPageNum()+1;
bean.setAllPage(allpages);//设置总页数
session.close();
}}
======================================SSH===============================================
3、业务类接口------------------------ScoreBiz：void getListByPage(Score score, PageBean bean);UserInfoBiz：void getListByPage(UserInfo user, PageBean bean);4、实现业务接口类：----------=================ScoreBizImpl==========
package com.myweb.biz.impl;import com.myweb.biz.ScoreBiz;
import com.myweb.dao.CommonDao;
import com.myweb.entity.Score;
import com.myweb.util.PageBean;public class ScoreBizImpl implements ScoreBiz{ private CommonDao dao;
public CommonDao getDao() {
return dao;
}
public void setDao(CommonDao dao) {
this.dao = dao;
}
public void getListByPage(Score score, PageBean bean) {
String hql="from Score s where 1=1";
if(score!=null){
if(score.getScore()!=null)
hql+=" s.score ="+score.getScore();

}
dao.ListByPage(hql, bean);
}

}
==============UserInfoBizImpl==================
package com.myweb.biz.impl;import com.myweb.biz.UserInfoBiz;
import com.myweb.dao.CommonDao;
import com.myweb.entity.UserInfo;
import com.myweb.util.PageBean;public class UserInfoBizImpl implements UserInfoBiz { private CommonDao dao;
public void getListByPage(UserInfo user, PageBean bean) {
String hql="from UserInfo u where 1=1";
if(user!=null){
if(user.getUserId()!=null)
hql+=" u.userId ="+user.getUserId();
if(user.getUserName()!=null)
hql+="  u.userName like '%"+user.getUserName()+"%' ";
}
dao.ListByPage(hql, bean);
}
public CommonDao getDao() {
return dao;
}
public void setDao(CommonDao dao) {
this.dao = dao;
}}
=========================================action================================
1、ScroeAction：---------------
/*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package com.myweb.struts.action;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 org.apache.struts.actions.DispatchAction;import com.myweb.biz.ScoreBiz;
import com.myweb.struts.form.BaseForm;
import com.myweb.struts.form.ScoreForm;/**
* MyEclipse Struts
* Creation date: 06-27-2009
*
* XDoclet definition:
* @struts.action path="/score" name="scoreForm" input="/form/score.jsp" scope="request" validate="true"
*/
public class ScoreAction extends DispatchAction {

private ScoreBiz biz;
public ScoreBiz getBiz() {
return biz;
}
public void setBiz(ScoreBiz biz) {
this.biz = biz;
}
public ActionForward toList(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
ScoreForm sf = (ScoreForm) form;
biz.getListByPage(sf.getScore(), sf.getPageBean());
request.setAttribute("bean", sf.getPageBean());
System.out.println("===================================");
return mapping.findForward("list");
}
}2、UserInfoAction:------------
/*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package com.myweb.struts.action;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;import com.myweb.biz.UserInfoBiz;
import com.myweb.struts.form.UserInfoForm;
import com.myweb.util.PageBean;
public class UserInfoAction extends DispatchAction { private UserInfoBiz biz;
public UserInfoBiz getBiz() {
return biz;
}
public void setBiz(UserInfoBiz biz) {
this.biz = biz;
}
public ActionForward toList(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
UserInfoForm uf = (UserInfoForm) form;
biz.getListByPage(uf.getUserinfo(), uf.getPageBean());
request.setAttribute("bean", uf.getPageBean());
return mapping.findForward("list");
}
}=========================================Form================================
1、baseForm：-------------
/*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package com.myweb.struts.form;import org.apache.struts.action.ActionForm;
import com.myweb.util.PageBean;/**
* MyEclipse Struts
* Creation date: 06-27-2009
*
* XDoclet definition:
* @struts.form name="baseForm"
*/
public class BaseForm extends ActionForm {
/*
* Generated fields
*/ /** pageBean property */
private PageBean pageBean=null; public BaseForm(){
pageBean=new PageBean();
}
/*
* Generated Methods
*/ /**
* Returns the pageBean.
* @return PageBean
*/
public PageBean getPageBean() {
return pageBean;
} /**
* Set the pageBean.
* @param pageBean The pageBean to set
*/
public void setPageBean(PageBean pageBean) {
this.pageBean = pageBean;
}
}2、ScoreForm：--------------
/*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package com.myweb.struts.form;import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import com.myweb.entity.Score;/**
* MyEclipse Struts
* Creation date: 06-27-2009
*
* XDoclet definition:
* @struts.form name="scoreForm"
*/
public class ScoreForm extends BaseForm {
/*
* Generated fields
*/ /** score property */
private Score score=new Score();
public Score getScore() {
return score;
} /**
* Set the score.
* @param score The score to set
*/
public void setScore(Score score) {
this.score = score;
}
}3、UserInfoForm:----------------
/*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package com.myweb.struts.form;import org.apache.struts.action.ActionForm;
import com.myweb.entity.UserInfo;/**
* MyEclipse Struts
* Creation date: 06-27-2009
*
* XDoclet definition:
* @struts.form name="userInfoForm"
*/
public class UserInfoForm extends BaseForm {
/*
* Generated fields
*/ /** userinfo property */
private UserInfo userinfo=new UserInfo();
/*
* Generated Methods
*/ /**
* Returns the userinfo.
* @return UserInfo
*/
public UserInfo getUserinfo() {
return userinfo;
} /**
* Set the userinfo.
* @param userinfo The userinfo to set
*/
public void setUserinfo(UserInfo userinfo) {
this.userinfo = userinfo;
}
}===============================================================================
==========================================PageBean==============================
package com.myweb.util;import java.util.ArrayList;
import java.util.List;public class PageBean {
private int currentPage=1;//当前页
private int allPage=0;//总页数
private int allNum=0;//总行数
private int pageNum=5;//每页显示行数
private List date=new ArrayList();//每页显示数据

public int getAllNum() {
return allNum;
}
public void setAllNum(int allNum) {
this.allNum = allNum;
}
public int getAllPage() {
return allPage;
}
public void setAllPage(int allPage) {
this.allPage = allPage;
}
public int getCurrentPage() {
return currentPage;
}
public void setCurrentPage(int currentPage) {
this.currentPage = currentPage;
}
public List getDate() {
return date;
}
public void setDate(List date) {
this.date = date;
}
public int getPageNum() {
return pageNum;
}
public void setPageNum(int pageNum) {
this.pageNum = pageNum;
}
}

struts2 分页 求解

解决方案 »

struts2 分页求解