implementation group: 'org.springframework.boot', name: 'spring-boot-starter-websocket', version: '2.0.1.RELEASE'
服务器端：
@Configuration
public class WebSocketConfig {
@Bean
public ServerEndpointExporter serverEndpointExporter() {
return new ServerEndpointExporter();
}
}
package cn.socket;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
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.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArraySet;
@Component
@ServerEndpoint("/pull/test/{id}")
public class WebSocketServer {
public WebSocketServer() {
System.out.println("---------创建socket---------");
}
private static int onlineCount = 0;
private static ConcurrentHashMap<String, WebSocketServer> webSocketSet = new ConcurrentHashMap<>();
private static CopyOnWriteArraySet<WebSocketServer> webSockets =new CopyOnWriteArraySet<>();
//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
private Session session;
private static Logger log = LogManager.getLogger(WebSocketServer.class);
private String id = "";
/**
* 连接建立成功调用的方法*/
@OnOpen
public void onOpen(@PathParam(value = "id") String id, Session session) {
this.session = session;
this.id = id;//接收到发送消息的人员编号
webSocketSet.put(id, this); //加入set中
webSockets.add(this);
addOnlineCount(); //在线数加1
log.info("用户"+id+"加入！当前在线人数为" + getOnlineCount());
try {
sendMessage("连接成功");
} catch (IOException e) {
log.error("websocket IO异常");
}
}
/**
* 连接关闭调用的方法
*/
@OnClose
public void onClose() {
webSocketSet.remove(this); //从set中删除
subOnlineCount(); //在线数减1
log.info("有一连接关闭！当前在线人数为" + getOnlineCount());
}
/**
* 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*/
@OnMessage
public void onMessage(String message, Session session) {
log.info("来自客户端的消息:" + message);
//可以自己约定字符串内容，比如 内容|0 表示信息群发，内容|X 表示信息发给id为X的用户
String sendMessage = message.split("[|]")[0];
String sendUserId = message.split("[|]")[1];
try {
if(sendUserId.equals("0"))
sendtoAll(sendMessage);
else
sendtoUser(sendMessage,sendUserId);
} catch (IOException e) {
e.printStackTrace();
}
}
/**
*
* @param session
* @param error
*/
@OnError
public void onError(Session session, Throwable error) {
log.error("发生错误");
error.printStackTrace();
}
public void sendMessage(String message) throws IOException {
this.session.getBasicRemote().sendText(message);
}
/**
* 发送信息给指定ID用户，如果用户不在线则返回不在线信息给自己
* @param message
* @param sendUserId
* @throws IOException
*/
public void sendtoUser(String message,String sendUserId) throws IOException {
if (webSocketSet.get(sendUserId) != null) {
if(!id.equals(sendUserId))
webSocketSet.get(sendUserId).sendMessage( "用户" + id + "发来消息：" + " <br/> " + message);
else
webSocketSet.get(sendUserId).sendMessage(message);
} else {
//如果用户不在线则返回不在线信息给自己
sendtoUser("当前用户不在线",id);
}
}
/**
* 发送信息给所有人
* @param message
* @throws IOException
*/
public void sendtoAll(String message) throws IOException {
for (String key : webSocketSet.keySet()) {
try {
webSocketSet.get(key).sendMessage(message);
} catch (IOException e) {
e.printStackTrace();
}
}
}
public void sendtoAll2(String message) throws IOException {
for (WebSocketServer webSocket : webSockets) {
try {
webSocket.sendMessage(message);
} catch (IOException e) {
e.printStackTrace();
}
}
}
public static synchronized int getOnlineCount() {
return onlineCount;
}
public static synchronized void addOnlineCount() {
WebSocketServer.onlineCount++;
}
public static synchronized void subOnlineCount() {
WebSocketServer.onlineCount--;
}
}
@RestController("outController")
@Api(tags = "外部接口管理")
@CrossOrigin //跨域访问 swagger 要使用到
public class OutController extends BaseController {
@Autowired
private WebSocketServer webSocketServer;
@ApiOperation("推送数据")
@GetMapping("/toHome")
public void toHome() throws Exception {
webSocketServer.sendtoAll2("1");
}
}
前端代码：
<!DOCTYPE html>
<html style="height: 100%;">
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge" />
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
<title>创建缓冲区</title>
</head>
<body style="height: 100%;">
<script type="text/javascript">
const ws=new WebSocket('ws://localhost:33002/tianjin-cim/tuchu/apis/pull/test/1');
ws.onmessage =function(e){
console.log(e)
};
</script>
</body>
</html>
websocket通过外网走域名访问
nginx的配置
server {
listen 80;监听端口
server_name roger.com;//域名
add_header Access-Control-Allow-Origin *;
#charset koi8-r;
#access_log logs/host.access.log main;
include D:/nginx-1.8.1/conf/conf.d/*.conf;
server_tokens off;
}
location /a/b {
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection 'upgrade';
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header Host $host;
proxy_pass http://localhost:20069/a/b;//后台服务地址
}
前端websocket地址： <script type="text/javascript"> const ws=new WebSocket('ws://www.roger.com/a/b/socket/register'); ws.onmessage =function(e){ console.log(e) };
