<servlet><servlet-name>dwr-invoker</servlet-name><!-- 旧版本用org.directwebremoting.servlet.DwrServlet 新版本用uk.ltd.getahead.dwr.DWRServlet --><servlet-class>uk.ltd.getahead.dwr.DWRServlet</servlet-class><init-param><param-name>debug</param-name><param-value>true</param-value></init-param><init-param><param-name>activeReverseAjaxEnabled</param-name><param-value>true</param-value></init-param><init-param><param-name>crossDomainSessionSecurity</param-name><param-value>false</param-value></init-param><init-param><param-name>allowScriptTagRemoting</param-name><param-value>true</param-value></init-param></servlet><servlet-mapping><servlet-name>dwr-invoker</servlet-name><url-pattern>/js/dwr/*</url-pattern></servlet-mapping>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE dwr PUBLIC    "-//GetAhead Limited//DTD Direct Web Remoting 3.0//EN"    "http://directwebremoting.org/schema/dwr30.dtd">
<dwr><allow><!-- 产生的Js的名称,与前端调用名称一致 --><create creator="new" javascript="mydwr"><param name="class" value="com.zns.test.dwr.MyDwr" /></create></allow>
</dwr>

package com.zns.test.dwr;import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.directwebremoting.Browser;
import org.directwebremoting.ScriptBuffer;
import org.directwebremoting.ScriptSession;
import com.zns.test.common.DwrUtils;public class MyDwr {public String func1(String name) {return "hello: " + name;}public void func2() {Runnable run = new Runnable() {private ScriptBuffer scriptBuffer = new ScriptBuffer();public void run() {// 设置要调用的 js函数及参数scriptBuffer.appendCall("addNum", 10, 20);// 得到所有ScriptSessionCollection<ScriptSession> sessions = Browser.getTargetSessions();// 遍历每一个ScriptSessionfor (ScriptSession scriptSession : sessions) {scriptSession.addScript(scriptBuffer);}}};// 执行推送
        Browser.withAllSessions(run);// 或者如下方式调用String jsFuncName = "addNum";List args = new ArrayList();args.add(10);args.add(20);DwrUtils.invokeJavascriptFunction(jsFuncName, args);}
}

package com.zns.test.common;import java.util.Collection;
import java.util.List;
import org.directwebremoting.Browser;
import org.directwebremoting.ScriptBuffer;
import org.directwebremoting.ScriptSession;public class DwrUtils {/*** 调用页面javascript函数* * @param functionName*            函数名* @param args*            参数列表*/public static void invokeJavascriptFunction(String _funcName, List _args) {final String funcName = _funcName;final List args = _args;Browser.withAllSessions(new Runnable() {private ScriptBuffer script = new ScriptBuffer();public void run() {// 拼接javascriptscript = script.appendScript(funcName + "(");for (int i = 0; i < args.size(); i++) {if (i != 0) {script = script.appendScript(",");}script = script.appendData(args.get(i));}script.appendScript(")");// System.out.println(script.toString());Collection<ScriptSession> sessions = Browser.getTargetSessions();for (ScriptSession scriptSession : sessions) {scriptSession.addScript(script);}}});}
}

<script src="js/jquery.min.js" type="text/javascript"></script>
<script src="js/dwr/engine.js" type="text/javascript"></script>
<script src="js/dwr/interface/mydwr.js" type="text/javascript"></script>
<script type="text/javascript">$(function(){dwr.engine.setActiveReverseAjax(true);mydwr.func1("zns",callback1);mydwr.func2();});function callback1(data){alert(data);}function addNum(num1,num2){var total= num1+num2;alert(total);}
</script>