springboot+websocket實現後臺與客戶端"全雙工"通信
項目結構圖：
2. 開發工具是IDEA, 創建springboot項目，在pox.xml中加入（下面是我的pom.xml的dependencies裏的全部依賴，因爲，這個是最簡單的入門例子,所以只有主要的websocket和web依賴）
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--websocket連接需要使用到的包-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
3.創建一個頁面index.html，前端跳轉後端的一些必要代碼，貼部分代碼
WebSocket建立連接WebSocket關閉連接
JS代碼如下：
(document).(() {
websocket = ().(() {
host = document..(window) {
()websocket = WebSocket(+ host ++ )} {
()
}
websocket.= () {
()()}websocket.= () {
()()}websocket.= (event) {
()(+ event.)(event.)}websocket.= () {
()}
})
().(() {
(websocket != ) {
websocket.()}
()
})
})(innerHTML) {
().(innerHTML)}JAVA後臺代碼:
com.eeka.wmslight.controller.configcom.eeka.wmslight.model.opm.Usercom.google.common.collect.Mapsorg.apache.shiro.SecurityUtilsorg.springframework.stereotype.javax.websocket.*javax.websocket.server.javax.websocket.server.java.io.IOExceptionjava.util.Mapjava.util.concurrent.CopyOnWriteArraySet()
MyWebSocket {
= CopyOnWriteArraySet<MyWebSocket> = CopyOnWriteArraySet<MyWebSocket>()Map<IntegerMyWebSocket> = Maps.()Session Integer (() Integer userIdSession session){
.= userId.= session.put(userId).add()()System..println(+ ())}
(){
.remove()()System..println(+ ())}
(String messageSession session) {
System..println(+ message)(MyWebSocket item: ){
}
}
(Session sessionThrowable error){
System..println()error.printStackTrace()}
(String messageInteger userId) IOException{
MyWebSocket socket = .get(userId)(socket != ) {
socket..getBasicRemote().sendText(message)}
}
() {
}
() {
MyWebSocket.++}
() {
MyWebSocket.--}
}SpringBoot需要注入WebSocketConfig
WebSocketConfig {
ServerEndpointExporter (){
ServerEndpointExporter()}
}4.然後在業務類裏面集成MyWebSocket