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Struts2+spring2+hibernate3整合�Ҏ(gu��)��

flustar — Tue, 25 Dec 2007 17:11:00 GMT

摘要: Struts2+Spring2+hibernate3整合�Ҏ(gu��)�� 阅读全文

flustar 2007-12-26 01:11 发表评论

��Z��spring+dwr+xml无刷新投��?调查)�pȝ��

flustar — Mon, 19 Nov 2007 10:04:00 GMT

一、徏立xml的数据结构，文�g名�ؓ(f��)�Q�vote.xml�Q�内容如下：(x��)

在你的web应用的根目录建立xml文�g夹，��其拯��到该目录下�?/p>

二、徏立xml对应的bean

/**

* @author flustar

* @version 创徏旉��Q�Jul 11, 2007 5:17:53 PM

* �c�说�?/p>

……………………………………………………………………….

public class VoteBean {

private String voteId;

private String name;

private String voteCount;

private String voteTotalCount;

private String percentum;

public VoteBean() {

}

public String getPercentum() {

return percentum;

}

public void setPercentum(String percentum) {

this.percentum = percentum;

}

public String getVoteId() {

return voteId;

}

public void setVoteId(String voteId) {

this.voteId = voteId;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public String getVoteCount() {

return voteCount;

}

public void setVoteCount(String voteCount) {

this.voteCount = voteCount;

}

三、徏立处理具体逻辑的service

package com.flustar.service;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.text.NumberFormat;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

import org.jdom.Attribute;

import org.jdom.Document;

import org.jdom.Element;

import org.jdom.input.SAXBuilder;

import org.jdom.output.Format;

import org.jdom.output.XMLOutputter;

import org.jdom.xpath.XPath;

import com.flustar.web.beans.VoteBean;

import com.flustar.web.config.ContextConfig;

public class VoteService {

private Element root, vote;

private Document doc;

private Attribute voteTotalCount;

private VoteBean voteBean;

private List voteBeanList;

private String path = ContextConfig.getContextPath()

+ "/xml/vote.xml";

public void buildDoc() throws Exception {

FileInputStream fi = null;

fi = new FileInputStream(path);

SAXBuilder sb = new SAXBuilder();

doc = sb.build(fi);

}

public void formatDoc() throws Exception {

Format format = Format.getCompactFormat();

format.setEncoding("UTF-8");// 讄��xml文�g的字�W��ؓ(f��)UTF-8

format.setIndent(" ");// 讄��xml文�g�~�进�?个空�?/p>

XMLOutputter xmlOut = new XMLOutputter(format);

xmlOut.output(doc, new FileOutputStream(path));

}

public String floatToPercentum(Double doubleNum) {

NumberFormat numberFormat = NumberFormat.getPercentInstance();

numberFormat.setMinimumFractionDigits(2);

// numberFormat.setMaximumIntegerDigits(2);

String str = numberFormat.format(doubleNum);

//System.out.println(str);

return str;

}

public void updateVoteCount(String voteId) throws Exception {

buildDoc();

root = doc.getRootElement();

vote = (Element) XPath.selectSingleNode(root, "http://vote[@voteId='"

+ voteId + "']");

int voteCount = Integer.parseInt(vote.getAttributeValue("voteCount")) + 1;

//System.out.println(voteCount);

vote.setAttribute("voteCount", String.valueOf(voteCount));

int totalCount = Integer.parseInt(root

.getAttributeValue("voteTotalCount")) + 1;

voteTotalCount = new Attribute("voteTotalCount", String

.valueOf(totalCount));

root.setAttribute(voteTotalCount);

System.out.println(totalCount);

formatDoc();

updateAllVoteCount();//更新所有的癑ֈ��?/p>

}

public void updateAllVoteCount()throws Exception{

buildDoc();

root=doc.getRootElement();

int totalCount = Integer.parseInt(root

.getAttributeValue("voteTotalCount"));

List voteList=XPath.selectNodes(root,"/votes/vote");

for(int i=0;i

vote=(Element)voteList.get(i);

int voteCount = Integer.parseInt(vote.getAttributeValue("voteCount"));

System.out.println(voteCount);

vote.setAttribute("voteCount", String.valueOf(voteCount));

vote.setAttribute("percentum", floatToPercentum(1.0 * voteCount

/ totalCount));

}

formatDoc();

}

public List getAllVote() throws Exception {

buildDoc();

voteBeanList = new ArrayList();

root = doc.getRootElement();

String totalCount = root.getAttributeValue("voteTotalCount");

List voteList = root.getChildren();

Iterator i = voteList.iterator();

while (i.hasNext()) {

voteBean = new VoteBean();

voteBean.setVoteTotalCount(totalCount);

vote = (Element) i.next();

String name = vote.getAttributeValue("name");

String voteCount = vote.getAttributeValue("voteCount");

String percentum = vote.getAttributeValue("percentum");

voteBean.setName(name);

voteBean.setVoteCount(voteCount);

voteBean.setPercentum(percentum);

voteBeanList.add(voteBean);

}

return voteBeanList;

}

public String getVoteTotalCount() {

return voteTotalCount;

}

public void setVoteTotalCount(String voteTotalCount) {

this.voteTotalCount = voteTotalCount;

}

四、获取上下文路径的listener

package com.flustar.web.listener;

import javax.servlet.ServletContextEvent;

import javax.servlet.ServletContextListener;

import com.flustar.web.config.ContextConfig;

public class ConfigLoadContextListener implements ServletContextListener{

public void contextDestroyed(ServletContextEvent arg0) {

// TODO Auto-generated method stub

}

public void contextInitialized(ServletContextEvent contextEvent) {

// TODO Auto-generated method stub

String contextPath = contextEvent.getServletContext().getRealPath("/");

ContextConfig.setContextPath(contextPath);

}

………………………………………………………..

……………………………………………………………

public class ContextConfig {

private static String contextPath;

public static String getContextPath() {

return contextPath;

}

public static void setContextPath(String contextPath) {

ContextConfig.contextPath = contextPath;

}

……………………………………………………………………

………………………………………………………………..

}

五、在applicationContext-service.xml中注册VoteService

六、注册xml�Q�在你的web应用的WEB-INFO目录下徏立applicationContext-dwr.xml文�g�Q�内容�ؓ(f��)�Q?/p>

七、修改web.xml

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"

version="2.4">

…………………………………………………………………………………………………………………………

………………………………………………………………………………………………………………………………..

contextConfigLocation

…………………………………..

/WEB-INF/classes/applicationContext-service.xml

……………………………………………………………………………………………………………………………………………. com.flustar.web.listener.ConfigLoadContextListener

…………………………………………………………………………………………………………………………………………….

dwr-invoker

org.directwebremoting.servlet.DwrServlet

debug

true

dwr-invoker

/dwr/*

…………………………………………………………………………………………………………………………………………….

八、jsp��面

<%@ page contentType="text/html; charset=gbk" language="java" import="java.sql.*" errorPage="" %>

投票�pȝ��

你��用最多的一门语�a�是？

C语言

c++

java

汇编语言

投票�l�果

投票�l�果
语言	癑ֈ��?lt;/th>	��数

�?lt;span id="totalCount">条投��?lt;br/>

[关闭�H�口]

flustar 2007-11-19 18:04 发表评论

flustar — Tue, 13 Nov 2007 02:50:00 GMT

旉��q�得真快�Q�已�l�半�q�没有更新自��q��博客了�?nbsp; 好了�Q�言归正传。大安��知道�|�上�q��ؓ(f��)��传的一个分��늱�是：(x��)PaginationSupport.java其源代码如下�Q?br />

public class PaginationSupport{

public final static int PAGESIZE = 30;

private int pageSize = PAGESIZE;

private List items;

private int totalCount;

private int[] indexes = new int[0];

private int startIndex = 0;

public PaginationSupport(List items, int totalCount) {
  setPageSize(PAGESIZE);
  setTotalCount(totalCount);
  setItems(items);
  setStartIndex(0);
}

public PaginationSupport(List items, int totalCount, int startIndex) {
  setPageSize(PAGESIZE);
  setTotalCount(totalCount);
  setItems(items);
  setStartIndex(startIndex);
}

public PaginationSupport(List items, int totalCount, int pageSize,
   int startIndex) {
  setPageSize(pageSize);
  setTotalCount(totalCount);
  setItems(items);
  setStartIndex(startIndex);
}

public List getItems() {
return items;
}

public void setItems(List items) {
this.items = items;
}

public int getPageSize() {
return pageSize;
}

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

public int getTotalCount() {
return totalCount;
}

public int[] getIndexes() {
return indexes;
}

public void setIndexes(int[] indexes) {
this.indexes = indexes;
}

public int getStartIndex() {
return startIndex;
}

public void setStartIndex(int startIndex) {
 if (totalCount <= 0)
 this.startIndex = 0;
 else if (startIndex >= totalCount)
 this.startIndex = indexes[indexes.length - 1];
 else if (startIndex < 0)
 this.startIndex = 0;
 else {
 this.startIndex = indexes[startIndex / pageSize];
 }
}

public int getNextIndex() {
  int nextIndex = getStartIndex() + pageSize;
  if (nextIndex >= totalCount)
   return getStartIndex();
  else
   return nextIndex;
}

public int getPreviousIndex() {
 int previousIndex = getStartIndex() - pageSize;
 if (previousIndex < 0)
 return 0;
 else
 return previousIndex;
}

public int getPageCount() {
  int count = totalCount / pageSize;
  if (totalCount % pageSize > 0)
   count++;
  return count;
}

public int getCurentPageNum() {
return getStartIndex() / pageSize + 1;
}

}
在这个分��늱�中设定了每页要显�C�的记录��C��及开始烦引，如果用普通的jsp来取�q�个分页�cȝ��数据�q�可以，但是使用spring+hibernate�q�种架构��显得比较麻烦（原因是spring MVC�q�回的是一�?nbsp;PaginationSupport的对象，使用jstl作�ؓ(f��)前端昄��的话�Q�会(x��)在jsp��面中掺杂大量的计算�Q�像下一��늃�引，共多��条记录�Q�当前第几页�Q�共多少��늭��{�会(x��)使jsp很难�l�护�Q�下面是对这个类的改�q�：(x��)

public class PaginationSupport {
public final static int PAGESIZE = 30;

private int pageSize = PAGESIZE;

private int totalCount;

private int currentPage;

private int startIndex;

private int[] indexes = new int[0];

private int nextIndex;

private int previousIndex;

private int pageCount;

private List items;

private int lastIndex;

public  PaginationSupport(int pageSize,
   int startIndex) {
  setPageSize(pageSize);
  setStartIndex(startIndex);

}

public  PaginationSupport(List items, int totalCount) {
  setPageSize(PAGESIZE);
  setTotalCount(totalCount);
  setItems(items);
  setStartIndex(0);

}

public  PaginationSupport(List items, int totalCount, int startIndex) {
  setPageSize(PAGESIZE);
  setTotalCount(totalCount);
  setItems(items);
  setStartIndex(startIndex);

}

public  PaginationSupport(List items, int totalCount, int pageSize,
   int startIndex) {
  setPageSize(pageSize);
  setTotalCount(totalCount);
  setItems(items);
  setStartIndex(startIndex);

}

public void setTotalCount(int totalCount) {
 if (totalCount > 0) {
 this.totalCount = totalCount;
 int count = totalCount / pageSize;
 if (totalCount % pageSize > 0)
 count++;
 indexes = new int[count];
 for (int i = 0; i < count; i++) {
 indexes[i] = pageSize * i;
 }
 } else {
 this.totalCount = 0;
 }
}
public int getTotalCount() {
 return totalCount;
}
public void setIndexes(int[] indexes) {
 this.indexes = indexes;
}
public int[] getIndexes() {
 return indexes;
}

public void setNextIndex(int nextIndex) {
 this.nextIndex = nextIndex;
}
public int getNextIndex() {
 int nextIndex = getStartIndex() + pageSize;
 if (nextIndex >= totalCount)
 return getStartIndex();
 else
 return nextIndex;
}
public void setPreviousIndex(int previousIndex) {
 this.previousIndex = previousIndex;
}

public int getPreviousIndex() {
 int previousIndex = getStartIndex() - pageSize;
 if (previousIndex < 0)
 return 0;
 else
 return previousIndex;
}
public void setPageCount(int pageCount) {
 this.pageCount = pageCount;
}
public int getPageCount() {
 int count = totalCount / pageSize;
 if (totalCount % pageSize > 0)
 count++;
 return count;
}

public int getCurrentPage() {
return getStartIndex() / pageSize + 1;
}

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

public void setLastIndex(int lastIndex) {
  this.lastIndex =lastIndex ;
}
public int getLastIndex() {
  return indexes[indexes.length-1];
}

public int getPageSize() {
return pageSize;
}

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

public List getItems() {
return items;
}

public void setItems(List items) {
this.items = items;
}

}
以上是分��늚��装�c�，下面是支持分��|��询的�Ҏ(gu��)��Q?br /> 1�Q?br /> public PaginationSupport findPageByCriteria(
 final DetachedCriteria detachedCriteria, final int pageSize,
 final int startIndex) {
 return (PaginationSupport) getHibernateTemplate().execute(
 new HibernateCallback() {
 public Object doInHibernate(Session session)
 throws HibernateException {
 Criteria criteria = detachedCriteria
 .getExecutableCriteria(session);
 int totalCount = ((Integer) criteria.setProjection(
 Projections.rowCount()).uniqueResult())
 .intValue();
 criteria.setProjection(null);
 List items = criteria.setFirstResult(startIndex)
 .setMaxResults(pageSize).list();
 PaginationSupport ps = new PaginationSupport(items,
 totalCount, pageSize, startIndex);
 return ps;
 }
 }, true);
}
2�Q?br /> public PaginationSupport findPageByQuery( final String hsql, final int pageSize,final int startIndex){
 return (PaginationSupport)getHibernateTemplate().execute(
 new HibernateCallback() {
 public Object doInHibernate(Session session) throws HibernateException, SQLException {
 Query query = session.createQuery(hsql);
 int totalCount=query.list().size();
 query.setFirstResult(startIndex);
 query.setMaxResults(pageSize);
 List items = query.list();
 PaginationSupport ps = new PaginationSupport(items,
 totalCount, pageSize, startIndex);
 return ps;

 }
 },true);
 }
你也�怼�(x��)问分��|��询�ؓ(f��)什么会(x��)提供两个�Ҏ(gu��)��Q�这两个�Ҏ(gu��)��有区别吗�Q�其实这两个�Ҏ(gu��)��q�无本质区别�Q�DetachedCriteria 也是构造查询语句的与Query功能一��_(d��)��但是它提供了更加面向对象的方法来写hsql语句。一般�h们都們֐��W�一�U�方法，但是�q�种�Ҏ(gu��)��q�不通用�Q�它有一�U�查询�ƈ不支持，那就是当你要查询的对象�ƈ不是一个单一对象的话�Q�例�?你在数据库中有两个表�Q�一个是user,另一个是userinfo,�q�两个表所对应的对象在hiberante中被指定为共享主键的话，在执行查询的时候就�?x��)报�c�d��转换异常�Q�原因是查询出来的对象�ƈ不是user而是一个包含user 和userinfo的Object,你若强制把它转换成user�c�d��Q�肯定会(x��)出错),�q�时你不得不采用�W�二个方法。当然这只是我个��解，也许�q�有地方说的不是很准��，希望大家多多批评指正�?br /> 最后是�q�个分页�cȝ��前台昄��源代�?
<%@ page language="java" contentType="text/html; charset=gbk"
 pageEncoding="GBK"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%>

 昄��所有用�?lt;/title> </head> <body> <div style="margin:20px auto 30px; width:70%;"><a href="index.jsp" class="btn2">�q�回首页</a></div> <div style="margin:10px auto 0; width:70%;"> <table width="100%" border="0" cellpadding="0" cellspacing="0"> <caption> 昄��所有用�?br /> </caption> <tr> <td>用户ID</td> <td>用户�?lt;/td> <td>用户�늧�</td> <td>�?sh��)子邮�g</td> <td>注册旉��</td> <td>详细信息</td> <td>用户充��D��?lt;/td> <td>用户定制服务信息</td> </tr> <c:forEach var="user" items="${userPage.items}"> <tr> <td>${user.intId}</td> <td>${user.username}</td> <td>${user.name}</td> <td>${user.email}</td> <td><fmt:formatDate value='${user.creationTime}' pattern='yyyy-MM-dd HH:mm' /></td> <td><a href="user_getdetailUser.ado?userId=${user.intId}" class="btn">详细信息</a></td> <td><a href="orderService_getUserAccountAdds.ado?userId=${user.intId}" class="btn">用户充��D��?lt;/a></td> <td><a href="orderService_getUserChargeItems.ado?userId=${user.intId}" class="btn">用户定制服务信息</a></td> </tr> </c:forEach> </table> <c:if test="${!empty userPage}"> �?{userPage.totalCount}记录 <c:choose> <c:when test="${userPage.startIndex ne '0'}"> <a href="user_getPage.ado?startIndex=0">首页</a> </c:when> <c:otherwise> 首页 </c:otherwise> </c:choose> <c:choose> <c:when test="${userPage.previousIndex lt userPage.startIndex}"> <a href="user_getPage.ado?startIndex=${userPage.previousIndex }">上一��?lt;/a> </c:when> <c:otherwise> 上一��?br /> </c:otherwise> </c:choose> <c:choose> <c:when test="${userPage.nextIndex>userPage.startIndex}"> <a href="user_getPage.ado?startIndex=${userPage.nextIndex}">下一��?lt;/a> </c:when> <c:otherwise> 下一��?br /> </c:otherwise> </c:choose> <c:choose> <c:when test="${userPage.lastIndex eq userPage.startIndex}"> 最后一��?br /> </c:when> <c:otherwise> <a href="user_getPage.ado?startIndex=${userPage.lastIndex}">最后一��?lt;/a> </c:otherwise> </c:choose> 每页昄��${userPage.pageSize}条记�? 当前�W?{userPage.currentPage }/${userPage.pageCount}��?br /> </c:if> </div> </body> </html> <div align=right><a style="text-decoration:none;" href="http://m.tkk7.com/flustar/" target="_blank">flustar</a> 2007-11-13 10:50 <a href="http://m.tkk7.com/flustar/archive/2007/11/13/160142.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div> </article> </main></body></html>