dwr的server-side clock例子

package com.example.dwr.reverseajax; import java.text.DateFormat; import java.util.Date; import java.util.Locale; import java.util.concurrent.ScheduledThreadPoolExecutor; import java.util.concurrent.TimeUnit; import org.directwebremoting.Browser; import org.directwebremoting.ServerContextFactory; import org.directwebremoting.ui.dwr.Util; public class Clock implements Runnable { protected transient boolean active = false; int i = 0; public Clock() { ScheduledThreadPoolExecutor executor = new ScheduledThreadPoolExecutor( 1); executor.scheduleAtFixedRate(this, 1, 1, TimeUnit.SECONDS); } public void run() { if (active) { setClockDisplay((new java.text.SimpleDateFormat("yyyy年MM月dd日 hh时mm分ss秒")).format(new Date())); } } /** * Called from the client to turn the clock on/off */ public synchronized void toggle() { i++; active = !active; System.out.println("toggle clicked!" + i); System.out.println("active:" + active); if (active) { setClockDisplay("Started"); } else { setClockDisplay("Stopped"); } } public void setClockDisplay(final String output) { String page = ServerContextFactory.get().getContextPath() + "/test.jsp"; Browser.withPage(page, new Runnable() { public void run() { Util.setValue("clockDisplay", output); } }); } }