websocket前台实现代码，保存为html执行就好
html代码来自：https://blog.csdn.net/M348915654/article/details/53616837
<html>
<head>
<meta charset="utf-8">
<title>WebSoket Demo</title>
<script type="text/JavaScript">
// tips: WebSocket 调试脚本
var WebSocket = WebSocket || window.WebSocket || window.MozWebSocket;
// 验证浏览器是否支持WebSocket协议
if (!WebSocket) {
alert("WebSocket not supported by this browser!");
}
else {
var g_ws = null; function Display() {
// 载入上次记录的数据 //...
console.log("websocket 测试");
} var log = function (s) {
if (document.readyState !== "complete") {
log.buffer.push(s);
} else {
document.getElementById("contentId").value = (s + "\n") + document.getElementById("contentId").value
}
} function CreateConnect () {
var msg = document.getElementById("wsUrlId");
console.log("CreateConnect(), url: " + msg.value);
if (g_ws == null) {
var wsUrlValue = msg.value; try {
g_ws = new WebSocket(wsUrlValue);
// 监听消息
g_ws.onmessage = function (event) {
//valueLabel.innerHTML+ = event.data;
log("onmessage(), 接收到服务器消息: " + event.data);
};
// 打开 WebSocket
g_ws.onclose = function (event) {
//WebSocket Status:: Socket Closed
log("onclose(), Socket 已关闭!");
g_ws = null;
};
// 打开WebSocket
g_ws.onopen = function (event) {
//WebSocket Status:: Socket Open
// 发送一个初始化消息
// g_ws.send("Hello, Server!");
log("onopen(), Socket 连接成功!");
};
g_ws.onerror = function (event) {
//WebSocket Status:: Error was reported
log("onerror(), Socket 发生错误!");
};
}
catch (e) {
g_ws = null;
log("连接异常, 重置 websocket");
}
}
} function SendMsg() {
var msg = document.getElementById("messageId");
console.log("SendMsg(), msg: " + msg.value);
if (g_ws != null) {
//alert(msg.value);
log("发送 Socket 消息: " + msg.value);
g_ws.send(msg.value);
}
else {
log("Socket 还未创建!, msg: " + msg.value);
}
} function CloseConnect () {
console.log("CloseConnect()");
if (g_ws != null) {
g_ws.close();
}
}
}
</script>
</head> <body onload="Display()">
<div id="valueLabel"></div>
<textarea rows="20" cols="30" id="contentId"></textarea>
<br/>
<input name="wsUrl" id="wsUrlId" value="ws://localhost:8888/websocket"/>
<button id="createButton" onClick="javascript:CreateConnect()">Create</button>
<button id="closeButton" onClick="javascript:CloseConnect()">Close</button>
<br/>
<input name="message" id="messageId" value="Hello, Server!"/>
<button id="sendButton" onClick="javascript:SendMsg()">Send</button>
</body>
</html>
方法一
配置：
/**
* webSocket 方法一
*/
@Configuration
@ConditionalOnWebApplication
public class WebSocketConfig {
@Bean
public ServerEndpointExporter serverEndpointExporter() {
return new ServerEndpointExporter();
}
}
实现：
/**
* webSocket 方法一
*/
@Slf4j
@ServerEndpoint(value = "/websocket")
@Component
public class WebSocketServer {
/**
* 连接建立成功调用的方法
*/
@OnOpen
public void onOpen(Session session) { } /**
* 连接关闭调用的方法
*/
@OnClose
public void onClose() {
webSocketSet.remove(this); //从set中删除 } /**
* 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) { } /**
* @param session
* @param error
*/
@OnError
public void onError(Session session, Throwable error) { }
}
方法二：
配置
/**
* webSocket方法二
* @author tongxiabin
*/
@Component
@EnableWebMvc
@EnableWebSocket
public class WebSocketConfig2 implements WebSocketConfigurer { @Resource
private MyWebSocketHandler handler; @Override
public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
registry.addHandler(handler, "/wsMy").addInterceptors(new HandshakeInterceptor() {
@Override
public boolean beforeHandshake(ServerHttpRequest request, ServerHttpResponse serverHttpResponse, WebSocketHandler webSocketHandler, Map<String, Object> map) throws Exception {
System.out.println("registerWebSocketHandlers-beforeHandshake");
serverHttpResponse.setStatusCode(HttpStatus.OK);
return true;
} @Override
public void afterHandshake(ServerHttpRequest serverHttpRequest, ServerHttpResponse serverHttpResponse, WebSocketHandler webSocketHandler, Exception e) {
System.out.println("registerWebSocketHandlers-afterHandshake");
}
}).setAllowedOrigins("*");
}
}
实现：
/**
* webSocket 方法二
*/
@Component
public class MyWebSocketHandler implements WebSocketHandler { private static final Map<String ,WebSocketSession> userMap=new HashMap<>();
@Override
public void afterConnectionEstablished(WebSocketSession webSocketSession) throws Exception {
String jspCode = (String )webSocketSession.getAttributes().get("jspCode"); if(userMap.get(jspCode)==null){
System.out.println(jspCode);
userMap.put(jspCode,webSocketSession);
}
} @Override
public void handleMessage(WebSocketSession webSocketSession, WebSocketMessage<?> webSocketMessage) throws Exception {
System.out.println("handleMessage");
} @Override
public void handleTransportError(WebSocketSession webSocketSession, Throwable throwable) throws Exception {
System.out.println("handleTransportError");
} @Override
public void afterConnectionClosed(WebSocketSession webSocketSession, CloseStatus closeStatus) throws Exception {
System.out.println("afterConnectionClosed");
} @Override
public boolean supportsPartialMessages() {
return false;
}
}