Spring整合DWR comet 实现无刷新 多人聊天室

package org.huabo.webim; import java.util.Collection; import java.util.Date; import javax.servlet.ServletContext; import org.directwebremoting.ScriptBuffer; import org.directwebremoting.ScriptSession; import org.directwebremoting.ServerContext; import org.directwebremoting.ServerContextFactory; import org.huabo.webim.ChatMessageEvent; import org.huabo.webim.Message; import org.springframework.context.ApplicationEvent; import org.springframework.context.ApplicationListener; import org.springframework.web.context.ServletContextAware; /** * 监听自定义事件，推送给所有的访问者 * * @author WJ * */ @SuppressWarnings("unchecked") public class ChatMessageClient implements ApplicationListener, ServletContextAware { private ServletContext ctx; public void setServletContext(ServletContext ctx) { this.ctx = ctx; } @SuppressWarnings("deprecation") public void onApplicationEvent(ApplicationEvent event) { // 如果事件类型是ChatMessageEvent就执行下面操作 if (event instanceof ChatMessageEvent) { Message msg = (Message) event.getSource(); ServerContext context = ServerContextFactory.get(); // 获得客户端所有chat页面script session连接数 Collection<ScriptSession> sessions = context .getScriptSessionsByPage(ctx.getContextPath() + "/chat.jsp"); for (ScriptSession session : sessions) { ScriptBuffer sb = new ScriptBuffer(); Date time = msg.getTime(); String s = time.getYear() + "-" + (time.getMonth() + 1) + "-" + time.getDate() + " " + time.getHours() + ":" + time.getMinutes() + ":" + time.getSeconds(); // 执行setMessage方法 sb.appendScript("showMessage({msg: '").appendScript( msg.getMsg()).appendScript("', time: '") .appendScript(s).appendScript("'})"); System.out.println(sb.toString()); // 执行客户端script session方法，相当于浏览器执行JavaScript代码 // 上面就会执行客户端浏览器中的showMessage方法，并且传递一个对象过去 session.addScript(sb); } } } }