使用Quartz触发器加dwr推送技术（服务器推送技术，Server push）完成，直接用实例说明：
1、先看配置：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
<!-- 设定自动执行任务的方法体 -->
<!-- warnEventPushScanAction是Spring配置的java类名，scanWarnEvent为类里面的方法 -->
<bean id="warnEventPushScanJob"
class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
<property name="targetObject" ref="warnEventPushScanAction" />
<property name="targetMethod" value="scanWarnEvent" />
<property name="concurrent" value="false" /> <!--将并发设置,false为执行完本次任务再执行下一次的任务-->
</bean>
<!-- 设定自动执行任务的时间 每到一个时间点运行 -->
<bean id="warnEventPushScanTrigger" class="org.springframework.scheduling.quartz.CronTriggerBean">
<property name="jobDetail" ref="warnEventPushScanJob" />
<property name="cronExpression" value="0/5 * * * * ?" />
</bean>
<!-- 进行动态的任务注册和调度 -->
<bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean" >
<property name="triggers">
<list>
<ref bean="warnEventPushScanTrigger" />
</list>
</property>
</bean>
</beans>
2、看进入的方法及数据推送
public class WarnEventPushScanAction extends QueryManageAction {
private AlarmVideoCirculateAction alarmVideoCirculateAction;
public void scanWarnEvent() {
/*这里是你的逻辑*/
alarmVideoCirculateAction.callDWRPageJSFunctionForIndexPage(list);
}
}
public class AlarmVideoCirculateAction extends WebPushAction{
@SuppressWarnings("deprecation")
public static int callDWRPageJSFunctionForIndexPage(List smsJsons) {
//参数1是接收数据的页面，参数2是页面的js方法，参数三是传过去的数据
callDWRPageJSFunction("monitorVideo/HCVSM/alarmVideoCirculateH.jsp", "setAlarmVideoData", smsJsons);
return 0;
}
/**
* pushPage为推送的页面
* callBackMethod为js方法
* @param pushPage
* @param callBackMethod
* @param smsJsons
* @return
*/
@SuppressWarnings("deprecation")
public static int callDWRPageJSFunction(String pushPage, String callBackMethod, List smsJsons) {
int result = -1;
if (contex != null) {
//得到要推送到 的页面 dwr3为项目名称 ， 一定要加上。
if (projectName == null || projectName.equals("")) {
projectName = getProjectName();
}
String page = projectName + pushPage;
Collection<ScriptSession> sessions = contex.getScriptSessionsByPage(page);
Iterator it = sessions.iterator();
while (it.hasNext()) {
ScriptSession session = (ScriptSession) it.next();
Util util = new Util(session);
//回调js方法，callBackMethod：方法名，callBackParameter：回调参数
util.addFunctionCall(callBackMethod, smsJsons);
}
result = 1;
}
return result;
}
}