一.服务层
package com.demo.websocket;
import java.io.IOException;
import java.util.Iterator;
import java.util.concurrent.ConcurrentLinkedQueue;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.CloseStatus;
import org.springframework.web.socket.TextMessage;
import org.springframework.web.socket.WebSocketSession;
import org.springframework.web.socket.config.annotation.EnableWebSocket;
import org.springframework.web.socket.config.annotation.WebSocketConfigurer;
import org.springframework.web.socket.config.annotation.WebSocketHandlerRegistry;
import org.springframework.web.socket.handler.TextWebSocketHandler;
@Configuration@EnableWebSocketpublic class websocketListener implements WebSocketConfigurer, ServletContextListener{
private ConcurrentLinkedQueue<WebSocketSession> sessions = new ConcurrentLinkedQueue<WebSocketSession>();
private WebSocketHandlerTest handler;
@Override public void contextDestroyed(ServletContextEvent arg0) {
// TODO Auto-generated method stub }
@Override public void contextInitialized(ServletContextEvent arg0) {
// TODO Auto-generated method stub }
@Override public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
handler = new WebSocketHandlerTest();
registry.addHandler(handler, "/ws/notifymessage.ws");
registry.addHandler(handler, "/ws/sockjs/notifymessage.ws").withSockJS();
new Thread(handler).start();
}
class WebSocketHandlerTest extends TextWebSocketHandler implements Runnable{
@Override public void afterConnectionClosed(WebSocketSession session, CloseStatus status) throws Exception {
sessions.remove(session);
}
@Override public void afterConnectionEstablished(WebSocketSession session) throws Exception {
sessions.add(session);
}
@Override protected void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception {
super.handleTextMessage(session, message);
}
@Override public void run() {
System.out.println("等待推送....");
try {
int i = 0;
for (;
;
) {
synchronized (this) {
try {
Thread.sleep(3000);
}
catch (InterruptedException e) {
// TODO Auto-generated catch block e.printStackTrace();
}
}
if(i%10==0){
nofity("消息推送测试......");
System.out.println("推送消息了....");
}
else{
System.out.println("本次不推送消息了....");
}
i++;
}
}
catch (IOException e) {
e.printStackTrace();
System.out.println("失败....");
}
}
private void nofity(String message) throws IOException {
Iterator<WebSocketSession> iterator = sessions.iterator();
while (iterator.hasNext()) {
WebSocketSession session = iterator.next();
synchronized(session){
if(session.isOpen()){
session.sendMessage(new TextMessage(message));
}
else{
iterator.remove();
}
}
}
}
}
}
二.前台界面监听
<!DOCTYPE html><html><head><meta charset="UTF-8"><title>Insert title here</title></head><body>websocket测试界面</body><script type="text/javascript">var websocketPath = "localhost:8080/demo-web";
if ('WebSocket' in window) {
websocket = new WebSocket("ws://"+websocketPath+"/ws/notifymessage.ws");
}
else if ('MozWebSocket' in window) {
websocket = new MozWebSocket("ws://"+websocketPath+"/ws/notifymessage.ws");
}
else {
websocket = new SockJS("ws://"+websocketPath+"/ws/notifymessage.ws");
}
websocket.onopen = function (evnt) {
}
;
websocket.onmessage = function (evnt) {
console.log(evnt);
}
;
websocket.onerror = function (evnt) {
}
;
websocket.onclose = function (evnt) {
}
</script></html>
注意web.xml中配置DispatcherServlet控制器
spring-servlet.xml空文件
<servlet> <servlet-name>spring</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/spring-servlet.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>spring</servlet-name> <url-pattern>*.ws</url-pattern> </servlet-mapping>
以上所述是小编给大家介绍的Java中websocket消息推送的实现代码，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持！
