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springboot+websocket 歸納收集

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websocket是h5後的技術,主要實現是一個長連接跟tomcat的comet技術差不多,但websocket是基於web協議的,有更廣泛的支持。當然,在處理高並發的情況下,可以結合tomcat的asyncContext來實現長處理的異步返回等操作。

1.引入依賴類

<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.16.18</version>
</dependency>

<!-- websocket dependency -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
</dependency>

這裏主要是引入websocket的依賴類

2.springboot配置websocket的入口bean

在springboot的配置類下,引入以下的配置bean

@Bean
public ServerEndpointExporter serverEndpointExporter() {
return new ServerEndpointExporter();
}

3.實現websocket的後端處理邏輯

package com.ouyang.server;

import lombok.extern.slf4j.Slf4j;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

import javax.websocket.
*; import javax.websocket.server.ServerEndpoint; import java.io.IOException; import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.CopyOnWriteArraySet; /** * Created by Administrator on 2018/3/25. */ //@Slf4j @ServerEndpoint(value = "/websocket") @Component public class WebSocketServer { Logger log
= LoggerFactory.getLogger(WebSocketServer.class); //靜態變量,用來記錄當前在線連接數。應該把它設計成線程安全的。 private static int onlineCount = 0; //concurrent包的線程安全Set,用來存放每個客戶端對應的MyWebSocket對象。 private static CopyOnWriteArraySet<WebSocketServer> webSocketSet = new CopyOnWriteArraySet<WebSocketServer>(); // 備用的同步hashmap //private static ConcurrentHashMap<Session,WebSocketServer> webSocketServerConcurrentHashMap = new ConcurrentHashMap(); //與某個客戶端的連接會話,需要通過它來給客戶端發送數據 private Session session; /** * 連接建立成功調用的方法*/ @OnOpen public void onOpen(Session session) { this.session = session; webSocketSet.add(this); //加入set中 addOnlineCount(); //在線數加1 log.info("有新連接加入!當前在線人數為" + getOnlineCount()); try { sendMessage("連接成功"); } catch (IOException e) { log.error("websocket IO異常"); } } // //連接打開時執行 // @OnOpen // public void onOpen(@PathParam("user") String user, Session session) { // currentUser = user; // System.out.println("Connected ... " + session.getId()); // } /** * 連接關閉調用的方法 */ @OnClose public void onClose() { webSocketSet.remove(this); //從set中刪除 subOnlineCount(); //在線數減1 log.info("有一連接關閉!當前在線人數為" + getOnlineCount()); } /** * 收到客戶端消息後調用的方法 * * @param message 客戶端發送過來的消息*/ @OnMessage public void onMessage(String message, Session session) throws IOException { log.info("來自客戶端的消息:" + message); //群發消息 for (WebSocketServer item : webSocketSet) { try { item.sendMessage("response message:"+message); } catch (IOException e) { e.printStackTrace(); } } //單發的信息 sendMessage("currentWebsocket is ok!!! "); } /** * * @param session * @param error */ @OnError public void onError(Session session, Throwable error) { log.error("發生錯誤"); error.printStackTrace(); } /** * * @param message * @throws IOException */ public void sendMessage(String message) throws IOException { this.session.getBasicRemote().sendText(message); } /** * 群發自定義消息 * */ public static void sendInfo(String message) throws IOException { //log.info(message); for (WebSocketServer item : webSocketSet) { try { item.sendMessage(message); } catch (IOException e) { continue; } } } public static synchronized int getOnlineCount() { return onlineCount; } public static synchronized void addOnlineCount() { WebSocketServer.onlineCount++; } public static synchronized void subOnlineCount() { WebSocketServer.onlineCount--; } }

至此,我們關於後臺的websocket的主要實現類都實現了,接下來我們可以弄一個,測試的接口,用於給所有的websocket推送信息,如下:

@RequestMapping(value="/publicSend",method= RequestMethod.GET)
@ResponseBody
public String pushVideoListToWeb2(String id) {
try {
WebSocketServer.sendInfo("有新客戶呼入,sltAccountId:"+id);
for(int i= 0;i<20;i++){
WebSocketServer.sendInfo("有新客戶呼入,testing:"+String.valueOf(i));
}
}catch (IOException e) {

}
return "success!";

}

4.前端測試頁面的實現

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.springframework.org/schema/jdbc">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script src="/static/jquery.js"></script>
<script src="/static/stomp.min.js"></script>
<script src="/static/sockjs.min.js"></script>
<script>
//socket = new WebSocket("ws://localhost:8081/begenstom/websocket");
var socket;
if(typeof(WebSocket) == "undefined") {
console.log("您的瀏覽器不支持WebSocket");
}else {
console.log("您的瀏覽器支持WebSocket");

//實現化WebSocket對象,指定要連接的服務器地址與端口
//socket = new WebSocket("ws://localhost:9094/starManager/websocket/張三");
socket = new WebSocket("ws://localhost:8081/websocket");
//打開事件
socket.onopen = function () {
console.log("Socket 已打開");
for (var i=0;i<20;i++)
{
socket.send("這是來自客戶端的消息1:" + i);
}
//socket.send("這是來自客戶端的消息" + location.href + new Date());
};
//獲得消息事件
socket.onmessage = function (msg) {
console.log(msg.data);
//發現消息進入 調後臺獲取
document.write(msg.data);
};
//關閉事件
socket.onclose = function () {
console.log("Socket已關閉");
};
//發生了錯誤事件
socket.onerror = function () {
alert("Socket發生了錯誤");
}
$(window).unload(function () {
socket.close();
});
}
</script>


</head>
<body>

</body>
</html>

這裏主要用到3個js,可以去github上去當一個。


參考地址:
* https://blog.csdn.net/zhangdehua678/article/details/78913839
* https://github.com/ayman-elgharabawy/Kafka-SpringBoot-WebSocket
* 整合框架 https://github.com/527515025/springBoot

springboot+websocket 歸納收集