DWR2整合SPRIN1.2.8,HIBERNATE3实现下拉联动-优快云博客

本文链接：https://blog.youkuaiyun.com/leo821031/article/details/1517511

本文介绍如何使用DWR2与Spring框架结合，通过Hibernate进行数据操作，实现网页上的下拉列表联动功能。文章详细展示了配置过程，包括Web.xml、dwr.xml等文件的设置，并提供了关键的Java代码示例。

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DWR2整合SPRIN1.2.8,HIBERNATE3实现下拉联动

1.下载DWR2,把dwr.jar拷贝到工程的lib目录下

以下按步骤看...

/**
*Feb 23, 2007
* Zhou JianGuo
* 小白
* 中国电信上海技术研究院
* MSN:zhuojianguo_leo@hotmail.com
*/

Web.xml

<servlet>
        <servlet-name>dwr-invoker</servlet-name>
        <servlet-class>
            org.directwebremoting.servlet.DwrServlet
        </servlet-class>
        <init-param>
            <param-name>debug</param-name>
            <param-value>true</param-value>
        </init-param>
        <init-param>
        <param-name>pollAndCometEnabled</param-name>
        <param-value>true</param-value>
    </init-param>
    <init-param>
        <param-name>allowGetForSafariButMakeForgeryEasier</param-name>
       <param-value>true</param-value>
    </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    
    <servlet-mapping>
        <servlet-name>dwr-invoker</servlet-name>
        <url-pattern>/dwr/*</url-pattern>
    </servlet-mapping>

dwr.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN" "http://www.getahead.ltd.uk/dwr/dwr20.dtd">
<dwr>
    <allow>
    
    <create creator="spring" javascript="SelectDAO">
      <param name="beanName" value="selectDAO"/>
      <param name="location1" value="../applicationContext/select.xml"></param>
      <param name="location2" value="../applicationContext/applicationContext.xml"></param>
    </create>

</allow>
</dwr>

select.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>

<bean id="selectDAO" class="com.procedure.util.select.SelectDAO" >
  <property name="selectServiceImpl">
   <ref bean="SelectServiceImpl" />
  </property>
</bean>
<bean id="SelectServiceImpl" parent="baseTransactionProxy">
  <property name="target">
   <ref local="SelectServiceImplTarget" />
  </property>
</bean>

applicationContext.xml是主要的事务管理什么的，不贴了

SelectDAO.java

/**
*Feb 27, 2007
* Zhou JianGuo
* 小白
* 中国电信上海技术研究院
* MSN:zhuojianguo_leo@hotmail.com
*/
package com.procedure.util.select;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.Session;
import org.hibernate.Transaction;

import com.procedure.hibernate.SessionFactory.HibernateSessionFactory;
import com.procedure.hibernate.oracle10.getHibernateTemplate.model.VideoArea;
import com.procedure.org.framework.service.select.SelectService;

/**
*Feb 27, 2007
* Zhou JianGuo
* 小白
* 中国电信上海技术研究院
* MSN:zhuojianguo_leo@hotmail.com
*/
public class SelectDAO {

/**
*
*/
public SelectDAO() {
  // TODO Auto-generated constructor stub
}
/*
   * 获取所有大类的类别列表
   */

    /**
*Feb 20, 2007
* Zhou JianGuo
* 小白
* 中国电信上海技术研究院
* MSN:zhuojianguo_leo@hotmail.com
*/
SelectService selectServiceImpl;

VideoArea VideoArea=new VideoArea();
protected final Log logger = LogFactory.getLog(getClass().getName());
public Map getBigType()
{
   Map map = new HashMap();
   List list = new ArrayList();
   String queryString="from VideoArea where childid is null";
   list=selectServiceImpl.getBigType(queryString);
     for(int i=0;i<list.size();i++){

         //---------这里只能采用这种形式，呵呵，为什么？？请去看ＤＷＲ的文档吧
       map.put(((VideoArea)list.get(i)).getFatherid(),((VideoArea)list.get(i)).getFathername());
      }
   return map;
}
public Map getSmallType(String data)
{
   Map map = new HashMap();
   List list = new ArrayList();
   String queryString="from VideoArea where fatherid = ? and childid is not null";
   list=selectServiceImpl.getSmallType(queryString,data);
   System.out.println("list="+list);
     for(int i=0;i<list.size();i++){
      map.put(((VideoArea)list.get(i)).getChildid(),((VideoArea)list.get(i)).getChildname());
      }
   return map;
}

/**
* @return the selectServiceImpl
*/
public SelectService getSelectServiceImpl() {
return selectServiceImpl;
}

/**
* @param selectServiceImpl the selectServiceImpl to set
*/
public void setSelectServiceImpl(SelectService selectServiceImpl) {
this.selectServiceImpl = selectServiceImpl;
}
}

SelectService.java

/**
*Nov 8, 2006
* Zhou JianGuo
* 小白
* MSN:zhuojianguo_leo@hotmail.com
*/
package com.procedure.org.framework.service.select;

import java.util.List;

/**
*Nov 8, 2006
* Zhou JianGuo
* 小白
* MSN:zhuojianguo_leo@hotmail.com
*/
public interface SelectService{
/**
* Make the given instance managed and persistent.
*/
public List getBigType(String queryString);
public List getSmallType(String queryString,String params);
}

SelectServiceImpl.java

/**
*Nov 8, 2006
* Zhou JianGuo
* 小白
* MSN:zhuojianguo_leo@hotmail.com
*/
package com.procedure.org.framework.service.select;

import java.util.List;

import org.springframework.context.ApplicationContext;

import com.procedure.hibernate.oracle10.getHibernateTemplate.model.VideoArea;
import com.procedure.org.framework.dao.ICommonDAO;
import com.procedure.org.framework.service.BaseServiceImpl;

/**
*Nov 8, 2006
* Zhou JianGuo
* 小白
* MSN:zhuojianguo_leo@hotmail.com
*/
public class SelectServiceImpl implements SelectService{

/**
*
*/
public SelectServiceImpl() {
// TODO Auto-generated constructor stub
}
private ICommonDAO commonDAO;
/**
* The service Spring bean id, used in the applicationContext.xml file.
*/
private static final String SERVICE_BEAN_ID = "SelectServiceImpl";

/**
* Returns the singleton <code>IProcedureService</code> instance.
*/
public static ICommonDAO getInstance(ApplicationContext context) {
  return (ICommonDAO)context.getBean(SERVICE_BEAN_ID);
}
/**
* @return the commonDAO
*/
public ICommonDAO getCommonDAO() {
  return commonDAO;
}
/**
* @param commonDAO the commonDAO to set
*/
public void setCommonDAO(ICommonDAO commonDAO) {
  this.commonDAO = commonDAO;
}
public List getBigType(String queryString) {
  // TODO Auto-generated method stub
  return (List)this.getCommonDAO().getSelect(queryString);
}
public List getSmallType(String queryString,String params) {
  // TODO Auto-generated method stub
  return (List)this.getCommonDAO().getSelect(queryString,params);
}

}

页面上的

select.js代码

/*--------------------------------------------------|
| Zhou jianguo                                      |
|---------------------------------------------------|
| Copyright (c) 2007-2008 ChinaTelecom              |
|                                                   |
| Updated: 25.02.2007                               |
|--------------------------------------------------*/
function loadSelect()
{
   SelectDAO.getBigType(createSelect);
}
function createSelect(data)
{
   var big = document.getElementById("cpycde");
   var small = document.getElementById("orgcde");
    DWRUtil.removeAllOptions("cpycde");
    DWRUtil.removeAllOptions("orgcde");
    DWRUtil.addOptions("cpycde",{0:'选择地区'});//----------设置一个初始化的下拉列表内容
    DWRUtil.addOptions("orgcde",{0:'选择区县'});
    big.options[0].selected=true;
    small.options[0].selected=true;
    DWRUtil.addOptions("cpycde", data);
}
function selectASmallcategories(data)
{
var small = document.getElementById("orgcde");
var smallcategories=dwr.util.getValue("orgcde");
   small.length=1;
   small.options[0].selected=true;
if(data == "0"){
    DWRUtil.removeAllOptions("orgcde");
   DWRUtil.addOptions("orgcde",{0:'选择区县'});
    small.length=1;
    small.options[0].selected=true;

}else
{
    DWRUtil.removeAllOptions("orgcde");
DWRUtil.addOptions("orgcde",{0:'选择区县'});
SelectDAO.getSmallType(data,getASmallInfo);//这里被调用的方法要放后面，要传递的参数放前面
}
}
function getASmallInfo(data){
DWRUtil.addOptions("orgcde",data);
}