19 margin-top: 15px;
20 width: 20px;
21 height: 20px;
22 border-radius: 50%;
23 background: #55ff00;
24 }
25 .nowI{
26 background: #ff0000 !important;
27 }
28
29
30
31
32 {{item.id}}.{{item.name}}
33
34
35
36
37
38
39 var vm = new Vue({
40 el: “#app”,
41 data: {
42 list: [{
43 id: 1,
44 name: ‘张三’,
45 state: 1
46 },
47 {
48 id: 2,
49 name: ‘李四’,
50 state: 1
51 },
52 {
53 id: 3,
54 name: ‘王五’,
55 state: 1
56 },
57 {
58 id: 4,
59 name: ‘韩梅梅’,
60 state: 1
61 },
62 {
63 id: 5,
64 name: ‘李磊’,
65 state: 1
66 },
67 ]
68 }
69 })
70
71 var webSocket = null;
72 if (‘WebSocket’ in window) {
73 //创建WebSocket对象
74 webSocket = new WebSocket(“ws://localhost:18801/webSocket/” + getUUID());
75
76 //连接成功
77 webSocket.onopen = function() {
78 console.log(“已连接”);
79 webSocket.send(“消息发送测试”)
80 }
81 //接收到消息
82 webSocket.onmessage = function(msg) {
83 //处理消息
84 var serverMsg = msg.data;
85 var t_id = parseInt(serverMsg) //服务端发过来的消息，ID，string需转化为int类型才能比较
86 for (var i = 0; i < vm.list.length; i++) {
87 var item = vm.list[i];
88 if(item.id == t_id){
89 item.state = -1;
90 vm.list.splice(i,1,item)
91 break;
92 }
93 }
94 };
95
96 //关闭事件
97
《一线大厂Java面试题解析+后端开发学习笔记+最新架构讲解视频+实战项目源码讲义》
【docs.qq.com/doc/DSmxTbFJ1cmN1R2dB】 完整内容开源分享
webSocket.onclose = function() {
98 console.log(“websocket已关闭”);
99 };
100 //发生了错误事件
101 webSocket.onerror = function() {
102 console.log(“websocket发生了错误”);
103 }
104 } else {
105 alert(“很遗憾，您的浏览器不支持WebSocket！”)
106 }
107
108 function getUUID() { //获取唯一的UUID
109 return ‘xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx’.replace(/[xy]/g, function© {
110
111 var r = Math.random() * 16 | 0,
112 v = c == ‘x’ ? r : (r & 0x3 | 0x8);
113 return v.toString(16);
114 });
115 }
116
117
后端：
===
项目结构是这样子的，后面的代码关键注释都有，就不重复描述了
1、新建SpringBoot工程，选择web和WebSocket依赖
2、配置application.yml
1
2
3
4
5
6
7
8 .item {
9 display: flex;
10 border-bottom: 1px solid #000000;
11 justify-content: space-between;
12 width: 30%;
13 line-height: 50px;
14 height: 50px;
15 }
16
17 .item span:nth-child(2){
18 margin-right: 10px;
19 margin-top: 15px;
20 width: 20px;
21 height: 20px;
22 border-radius: 50%;
23 background: #55ff00;
24 }
25 .nowI{
26 background: #ff0000 !important;
27 }
28
29
30
31
32 {{item.id}}.{{item.name}}
33
34
35
36
37
38
39 var vm = new Vue({
40 el: “#app”,
41 data: {
42 list: [{
43 id: 1,
44 name: ‘张三’,
45 state: 1
46 },
47 {
48 id: 2,
49 name: ‘李四’,
50 state: 1
51 },
52 {
53 id: 3,
54 name: ‘王五’,
55 state: 1
56 },
57 {
58 id: 4,
59 name: ‘韩梅梅’,
60 state: 1
61 },
62 {
63 id: 5,
64 name: ‘李磊’,
65 state: 1
66 },
67 ]
68 }
69 })
70
71 var webSocket = null;
72 if (‘WebSocket’ in window) {
73 //创建WebSocket对象
74 webSocket = new WebSocket(“ws://localhost:18801/webSocket/” + getUUID());
75
76 //连接成功
77 webSocket.onopen = function() {
78 console.log(“已连接”);
79 webSocket.send(“消息发送测试”)
80 }
81 //接收到消息
82 webSocket.onmessage = function(msg) {
83 //处理消息
84 var serverMsg = msg.data;
85 var t_id = parseInt(serverMsg) //服务端发过来的消息，ID，string需转化为int类型才能比较
86 for (var i = 0; i < vm.list.length; i++) {
87 var item = vm.list[i];
88 if(item.id == t_id){
89 item.state = -1;
90 vm.list.splice(i,1,item)
91 break;
92 }
93 }
94 };
95
96 //关闭事件
97 webSocket.onclose = function() {
98 console.log(“websocket已关闭”);
99 };
100 //发生了错误事件
101 webSocket.onerror = function() {
102 console.log(“websocket发生了错误”);
103 }
104 } else {
105 alert(“很遗憾，您的浏览器不支持WebSocket！”)
106 }
107
108 function getUUID() { //获取唯一的UUID
109 return ‘xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx’.replace(/[xy]/g, function© {
110
111 var r = Math.random() * 16 | 0,
112 v = c == ‘x’ ? r : (r & 0x3 | 0x8);
113 return v.toString(16);
114 });
115 }
116
117
3、WebSocketConfig配置类
1 @Configuration
2 public class WebSocketConfig {
3
4 /**
5 * 注入一个ServerEndpointExporter,该Bean会自动注册使用@ServerEndpoint注解申明的websocket endpoint
6 */
7 @Bean
8 public ServerEndpointExporter serverEndpointExporter(){
9 return new ServerEndpointExporter();
10 }
11 }
4、WebSocketServer类，用来进行服务端和客户端之间的交互
1 /**
2 * @author jae
3 * @ServerEndpoint("/webSocket/{uid}") 前端通过此URI与后端建立链接
4 */
5
6 @ServerEndpoint("/webSocket/{uid}")
7 @Component
8 public class WebSocketServer {
9
10 private static Logger log = LoggerFactory.getLogger(WebSocketServer.class);
11
12 //静态变量，用来记录当前在线连接数。应该把它设计成线程安全的。
13 private static final AtomicInteger onlineNum = new AtomicInteger(0);
14
15 //concurrent包的线程安全Set，用来存放每个客户端对应的WebSocketServer对象。
16 private static CopyOnWriteArraySet sessionPools = new CopyOnWriteArraySet();
17
18 /**
19 * 有客户端连接成功
20 */
21 @OnOpen
22 public void onOpen(Session session, @PathParam(value = “uid”) String uid){
23 sessionPools.add(session);
24 onlineNum.incrementAndGet();
25 log.info(uid + “加入webSocket！当前人数为” + onlineNum);
26 }
27
28 /**
29 * 连接关闭调用的方法
30 */
31 @OnClose
32 public void onClose(Session session) {
33 sessionPools.remove(session);
34 int cnt = onlineNum.decrementAndGet();
35 log.info(“有连接关闭，当前连接数为：{}”, cnt);
36 }
37
38 /**
39 * 发送消息
40 */
41 public void sendMessage(Session session, String message) throws IOException {
42 if(session != null){
43 synchronized (session) {
44 session.getBasicRemote().sendText(message);
45 }
46 }