DWR学习总结

DWR学习总结

一、 将dwr.jar复制到WBE-INF/lib目录下
二、 在web.xml中添加如下：
<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>
<load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
<servlet-name>dwr-invoker</servlet-name>
<url-pattern>/dwr/*</url-pattern>
</servlet-mapping>


三．在WEB-INF/目录下创建dwr.xml文件，并编辑如下：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN" "http://getahead.ltd.uk/dwr/dwr20.dtd">

<dwr>
<allow>

<create creator="new" javascript="testDwr">
<param name="class" value="vnv.service.ProvinceServiceImpl" />
</create>

<convert match="vnv.po.CityBean" converter="bean"></convert>

<!--
<create javascript="userguest" creator="spring">
<param name="beanName" value="userguestDwr"></param>
</create>
<create javascript="MyVnvCheckDwr" creator="spring">
<param name="beanName" value="myVnvCheckDwr"></param>
</create>

-->

</allow>

</dwr>


四、 写DWR的JAVA代码

五、 在需要DWR的JSP页面中要添加如：

<script type='text/javascript' src='<%=path%>/dwr/engine.js'></script>
<script type='text/javascript' src='<%=path%>/dwr/util.js'></script>
<script type='text/javascript' src='<%=path%>/dwr/interface/testDwr.js'></script>

<script type="text/javascript">

function changeCity(obj){
var provinceId = obj.options[obj.selectedIndex].value;

testDwr.findCityBeanByProvinceId(provinceId,function(citys){
DWRUtil.removeAllOptions('citys');
DWRUtil.addOptions('citys',citys,'id','cityname');
});
}


</script>


如要WEB容器启动进，自动加载AutoRunServlet类，需要在web.xml中作如下配置：

<servlet>
<servlet-name>AutoRunServlet</servlet-name>
<servlet-class>com.thayer.report.action.AutoRunServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
<servlet-name>AutoRunServlet</servlet-name>
<url-pattern>/servlet/AutoRunServlet</url-pattern>
</servlet-mapping>