1. DWR development steps:

  1. The introduction of dwr.jar package (the latest is 2.0):
  2. Web.xml configuration file, by adding the following code: 
    <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>
 </servlet>
 <servlet-mapping>
  <servlet-name>dwr-invoker</servlet-name>
  <url-pattern>/dwr/*</url-pattern>
 </servlet-mapping>
  3. WEB-INF file dwr.xml create 
    <?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 javascript="xsajbxxService" creator="spring">
			<param name="beanName" value="XsjbxxService"></param>
		</create>
		<create javascript="testClass" creator="new">
			<param name="class" value="org.dwr.util.TestClass"></param>
		</create>
		<convert match="org.dwr.entity.XsaJbxx" converter="bean">
			<param name="include" value="xsid,xh,xm,xbmc"></param>
		</convert>
	</allow>
</dwr>
  4. The preparation of the script page 
    <script type="text/javascript" src="<%=request.getContextPath()%>/dwr/interface/xsajbxxService.js"></script>
<script type="text/javascript" src="<%=request.getContextPath()%>/dwr/engine.js"></script>
<script type="text/javascript" src="<%=request.getContextPath()%>/dwr/util.js"></script>
<script type="text/javascript">
	function getXsaJbxx(){
		var xsid=document.getElementById('xsid').value;
		xsajbxxService.getXsaJbxxById(xsid,load);
			}
			function load(data){
				document.getElementById('xm').innerHTML=data;
			}
			
		    function getXsByxxdm(){
		    	var xxdm=document.getElementById('xxdm').value;
		    	xsajbxxService.getXsaJbxxList(xxdm,datalist);
		    }
		    function datalist(data){
		    	var xslist='';
		    	for(var i=0;i<data.length;i++){
		    		xslist=xslist+'编号:'+data[i].xsid+'学籍号:'+data[i].xh+'姓名:'+data[i].xm+'性别:'+data[i].xbmc+'<br/>';
		    		
		    	}
		    	document.getElementById('xs').innerHTML=xslist;
		    }
		</script>
    Note:
  5. Dwr introduced a built-in page when the script should be added <% = request.getContextPath ()%>, Otherwise, there will be the issue of this depressed;