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Spring+hibernate+DWR整合

2011-11-28 17:22 375 查看

DWR的配置：

第一步：导入dwr.jar包

第二步：配置web.xml文件加入DWR的servlet配置，在web.xml中加入这句代码

<servlet>

<servlet-name>dwr</servlet-name>

<servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>dwr</servlet-name>

<url-pattern>/dwr/*</url-pattern>

</servlet-mapping>

第三步在WEB-INF下创建一个名为dwr.xml的文件，内容：

<?xml version="1.0" encoding="UTF-8"?>

<dwr>

<allow>

<create javascript="别名" creator="spring">

<param name="beanName" value="你要在jsp页面中调用的java类的类名"></param>

</create>

<convert match="java类返回的对象（如果只是String，则这个标签可以不使用）" converter="hibernate3"></convert>

</allow>

</dwr>

第四步：在jsp页面使用时先引入几个js

<script type="text/javascript" src="dwr/engine.js"></script>

<script type="text/javascript" src="dwr/util.js"></script>

<script type="text/javascript" src="dwr/interface/dwrxml中的别名.js"></script>

案例代码：这是一个地区选择后便会出现该地区的街道的案例！

java后台：

package dao;

import java.util.List;

import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import pojo.TblQx;

public class SelectDAO extends HibernateDaoSupport{
public List selectQxList(){
return getHibernateTemplate().find("from TblQx");
}
public List selectJdList(int qxid){
return getHibernateTemplate().find("from TblJd j where j.tblQx.qxid=?",qxid);
}

}

applicationContext.xml：

<?xml version="1.0" encoding="UTF-8"?>
<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd"> 
<bean id="user" class="dao.SelectDAO">
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
<bean id="dataSource"
class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName"
value="com.microsoft.sqlserver.jdbc.SQLServerDriver">
</property>
<property name="url"
value="jdbc:sqlserver://127.0.0.1:1433;databaseName=test">
</property>
<property name="username" value="sa"></property>
<property name="password" value="123"></property>
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource">
<ref bean="dataSource" />
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">
org.hibernate.dialect.SQLServerDialect
</prop>
</props>
</property>
<property name="mappingResources">
<list>
<value>pojo/TblQx.hbm.xml</value>
<value>pojo/TblJd.hbm.xml</value>
<value>pojo/Users.hbm.xml</value></list>
</property></bean></beans>

dwr配置：

<?xml version="1.0" encoding="UTF-8"?>

<dwr>

<allow>
<create javascript="selectService" creator="spring">
<param name="beanName" value="user"></param>
</create>
<convert match="pojo.TblJd" converter="hibernate3"></convert>
<convert match="pojo.TblQx" converter="hibernate3"></convert>
</allow>
</dwr>

Jsp：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">

<title>My JSP 'index.jsp' starting page</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">
<script type="text/javascript" src="dwr/engine.js"></script>
<script type="text/javascript" src="dwr/util.js"></script>
<script type="text/javascript" src="dwr/interface/selectService.js"></script>
<script type="text/javascript">
function myload(){
selectService.selectQxList(function(data){
var q=document.getElementById("qx");
for(i=0;i<data.length;i++){
q.options[i]=new Option(data[i].qx,data[i].qxid);
}
});
}

function changeJd(qxid){
selectService.selectJdList(qxid,function(data){
DWRUtil.addOptions($("jd"),data,"jdid","jd");
});
}
</script>
</head>

<body onload="myload()">
区县： <select id="qx" onchange="changeJd(this.value)"></select>街道<select id="jd"></select>
</body>
</html>

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