JavajavaTutorialDetailed explanation of the implementation code for message push through websocket in JavaDetailed explanation of the implementation code for message push through websocket in Java
This article mainly introduces the implementation code of websocket message push in Java. It is very good and has reference value. Friends in need can refer to it
1. Service layer
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
@EnableWebSocket
public 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();
}
}
}
}
}
}2. Front-end interface monitoring
<!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>Note that the DispatcherServlet controller is configured in web.xml
spring-servlet.xml is empty File
<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>The above is the detailed explanation of the implementation code of websocket message push in Java. For more related content, please pay attention to the PHP Chinese website (www.php.cn)!
Related articles:
WeChat development message push implementation skills (with code)
A WEB message push framework based on WebSocket
.NET WeChat development automatic content reply example code
How do I use Maven or Gradle for advanced Java project management, build automation, and dependency resolution?Mar 17, 2025 pm 05:46 PMThe article discusses using Maven and Gradle for Java project management, build automation, and dependency resolution, comparing their approaches and optimization strategies.
How do I create and use custom Java libraries (JAR files) with proper versioning and dependency management?Mar 17, 2025 pm 05:45 PMThe article discusses creating and using custom Java libraries (JAR files) with proper versioning and dependency management, using tools like Maven and Gradle.
How do I implement multi-level caching in Java applications using libraries like Caffeine or Guava Cache?Mar 17, 2025 pm 05:44 PMThe article discusses implementing multi-level caching in Java using Caffeine and Guava Cache to enhance application performance. It covers setup, integration, and performance benefits, along with configuration and eviction policy management best pra
How can I use JPA (Java Persistence API) for object-relational mapping with advanced features like caching and lazy loading?Mar 17, 2025 pm 05:43 PMThe article discusses using JPA for object-relational mapping with advanced features like caching and lazy loading. It covers setup, entity mapping, and best practices for optimizing performance while highlighting potential pitfalls.[159 characters]
How does Java's classloading mechanism work, including different classloaders and their delegation models?Mar 17, 2025 pm 05:35 PMJava's classloading involves loading, linking, and initializing classes using a hierarchical system with Bootstrap, Extension, and Application classloaders. The parent delegation model ensures core classes are loaded first, affecting custom class loa
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Atom editor mac version download
The most popular open source editor
MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.
EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function
Dreamweaver Mac version
Visual web development tools
Notepad++7.3.1
Easy-to-use and free code editor
