目录
效果
配置
application.properties
#spring.main.banner-mode = off spring.output.ansi.enabled=ALWAYS server.port=8888 server.servlet.context-path=/demo01
pom引入
<!-- 引入 websocket 依赖类--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-websocket</artifactId> <version>4.3.8.RELEASE</version> </dependency>
JAVA文件
HelloWorldApplication
package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.web.socket.server.standard.ServerEndpointExporter;
@SpringBootApplication
public class HelloWorldApplication {
public static void main(String[] args) {
SpringApplication.run(HelloWorldApplication.class, args);
}
}
WebSocketConfig
package com.example.demo;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.server.standard.ServerEndpointExporter;
@Configuration
public class WebSocketConfig {
@Bean
public ServerEndpointExporter serverEndpointExporter() {
System.out.println("------------------>>");
return new ServerEndpointExporter();
}
}WebSocket
package com.example.demo;
import org.springframework.stereotype.Component;
import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
*/
@ServerEndpoint("/websocket/{pageCode}")
@Component
public class WebSocket {
private static final String loggerName=WebSocket.class.getName();
//concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象。若要实现服务端与单一客户端通信的话，可以使用Map来存放，其中Key可以为用户标识
public static Map<String, List<Session>> electricSocketMap = new ConcurrentHashMap<String, List<Session>>();
/**
* 连接建立成功调用的方法
*
* @param session 可选的参数。session为与某个客户端的连接会话，需要通过它来给客户端发送数据
*/
@OnOpen
public void onOpen(@PathParam("pageCode") String pageCode, Session session) {
List<Session> sessions = electricSocketMap.get(pageCode);
if(null==sessions){
List<Session> sessionList = new ArrayList<>();
sessionList.add(session);
electricSocketMap.put(pageCode,sessionList);
}else{
sessions.add(session);
}
}
/**
* 连接关闭调用的方法
*/
@OnClose
public void onClose(@PathParam("pageCode") String pageCode,Session session) {
if (electricSocketMap.containsKey(pageCode)){
electricSocketMap.get(pageCode).remove(session);
}
}
/**
* 收到客户端消息后调用的方法
*
* @param message 客户端发送过来的消息
* @param session 可选的参数
*/
@OnMessage
public void onMessage(String message, Session session) {
System.out.println("websocket received message:"+message);
try {
session.getBasicRemote().sendText("这是推送测试数据！您刚发送的消息是："+message);
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 发生错误时调用
*
* @param session
* @param error
*/
@OnError
public void onError(Session session, Throwable error) {
System.out.println("发生错误");;
}
}2.html
<html>
<head>
<meta charset="UTF-8"></meta>
<title>springboot项目WebSocket测试demo</title>
</head>
<body>
<h3>springboot项目websocket测试demo</h3>
<h4>测试说明</h4>
<h5> websocket测试</h5>
<br />
<input id="text" type="text" />
<button onclick="send()">发送测试</button>
<hr />
<button onclick="clos()">关闭连接</button>
<hr />
<div id="message"></div>
<script>
var websocket = null;
if('WebSocket' in window){
websocket = new WebSocket("ws://127.0.0.1:8888/demo01/websocket/2");
}else{
alert("您的浏览器不支持websocket");
}
websocket.onerror = function(){
setMessageInHtml("send error！");
}
websocket.onopen = function(){
setMessageInHtml("connection success！")
}
websocket.onmessage = function(event){
setMessageInHtml(event.data);
}
websocket.onclose = function(){
setMessageInHtml("closed websocket!")
}
window.onbeforeunload = function(){
clos();
}
function setMessageInHtml(message){
document.getElementById('message').innerHTML += message;
}
function clos(){
websocket.close(3000,"强制关闭");
}
function send(){
var msg = document.getElementById('text').value;
websocket.send(msg);
}
</script>
</body>
</html>前台数据
后台数据
2021-03-15 23:24:23.563 INFO 8940 --- [nio-8888-exec-1] o.a.c.c.C.[.[localhost].[/demo01] : Initializing Spring DispatcherServlet 'dispatcherServlet'
2021-03-15 23:24:23.563 INFO 8940 --- [nio-8888-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
2021-03-15 23:24:23.567 INFO 8940 --- [nio-8888-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 4 ms
websocket received message:NIO4444
websocket received message:de
完整demo：javascript:void(0)
