java 消息推送框架 java消息推送到页面

1.新建项目，像项目中添加jar包，或者在maven的pom.xml中添加依赖，添加comet4j-tomcat7.jar包

如果不是maven项目，可以将comet4j-tomcat7.jar包放在lib下，如图：

如果是maven项目，在pom.xml文件中添加依赖，如图：

2.修改tomcat中server.xml配置，protocol="org.apache.coyote.http11.Http11NioProtocol"，如下图：

3.编写后台代码，后台java代码如下

package org.comet4j.demo;
import java.util.Random;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import org.comet4j.core.CometContext;
import org.comet4j.core.CometEngine;
public class CometListener implements ServletContextListener{
private static final String CHANNEL = "test";
public void contextInitialized(ServletContextEvent arg0) {
CometContext cc = CometContext.getInstance();
cc.registChannel(CHANNEL);// 注册应用的channel
//在这里可以直接启动线程进行调用，也可以在方法中进行调用
Thread helloAppModule = new Thread(new HelloAppModule(),"Sender App Module");
// 是否启动
helloAppModule.setDaemon(true);
// 启动线程
helloAppModule.start();
}
class HelloAppModule implements Runnable {
public void run() {
while (true) {
try {
// 睡眠时间
Thread.sleep(2000);
} catch (Exception ex) {
ex.printStackTrace();
}
CometEngine engine = CometContext.getInstance().getEngine();
// 开始发送
engine.sendToAll(CHANNEL, getMessage());
}
}
}
public String getMessage(){
String[]names = new String[]{"冯春雷","吴兆元","夏胜安","李瑞东","田东东","张文良","刘权","邵帅","肖小良","任银","王继伟"};
int number = new Random().nextInt(10) + 1;
return names[number];
}
@Override
public void contextDestroyed(ServletContextEvent sce) {
// TODO Auto-generated method stub
}
}

4.配置web.xml,添加监听

org.comet4j.core.CometAppListener

CometServlet

CometServlet

org.comet4j.core.CometServlet

CometServlet

/conn

org.comet4j.demo.CometListener

index.html

5.编写前台测试页面

Insert title here

你好：...