Construction of websocket under spring framework
- 2020-06-15 09:08:27
- OfStack
This paper is based on Apach Tomcat 8.0.3+MyEclipse+maven+JDK1.7
spring4.0 after adding the support of websocket technology, the main project is using SSM (springMVC+spring+MyBatis) framework, so must first spring comes with websocket
Add jar packages that websocket depends on to ES19en. xml of maven
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.4.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.4.0</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-websocket</artifactId>//version To be and spring mvc the version keep 1 Cause, otherwise there will be problems
<version>4.0.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-messaging</artifactId>
<version>4.0.5.RELEASE</version>
</dependency>
Update namespace. xsd in spring-ES28en. xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:websocket="http://www.springframework.org/schema/websocket"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/websocket http://www.springframework.org/schema/websocket/spring-websocket.xsd">
spring configuration for handling classes and handshake protocols (applicationContext.xml file)
<bean id="websocket" class="com.xl.websocket.handler"/>
<websocket:handlers>
<websocket:mapping path="/websocket" handler="websocket"/>
<websocket:handshake-interceptors>
<bean class="com.xl.websocket.HandshakeInterceptor"/>
</websocket:handshake-interceptors>
<websocket:sockjs/>
</websocket:handlers>
webconfig
@Override
public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
registry.addHandler(new HelloHandler(), "/hello").addInterceptors(new HandshakeInterceptor()).withSockJS().setHttpMessageCacheSize(20000);
}
Create the Handshake (handshake) interface
public class HandshakeInterceptor extends HttpSessionHandshakeInterceptor {
@Override
public boolean beforeHandshake(ServerHttpRequest arg0,
ServerHttpResponse arg1, WebSocketHandler arg2,
Map<String, Object> arg3) throws Exception {
System.out.println("---- Before Handshake ----");
return super.beforeHandshake(arg0, arg1, arg2, arg3);
}
@Override
public void afterHandshake(ServerHttpRequest request,
ServerHttpResponse response, WebSocketHandler wsHandler,
Exception ex) {
System.out.println("---- After Handshake ----");
super.afterHandshake(request, response, wsHandler, ex);
}
}
4 Create the websocket processing class
public class HelloHandler extends TextWebSocketHandler {
public static List<WebSocketSession> users;
static{
users = new ArrayList<WebSocketSession>();
}
@Override
public void handleTextMessage(WebSocketSession session, TextMessage message) {
// Called when a client message is received
System.out.println("text message: " + session.getId() + "-" + message.getPayload());
}
@Override
public void afterConnectionEstablished(WebSocketSession session)
throws Exception {
// Call after completing the connection with the client
System.out.println("afterConnectionEstablished");
System.out.println("getId:" + session.getId());
System.out.println("getLocalAddress:" + session.getLocalAddress().toString());
System.out.println("getTextMessageSizeLimit:" + session.getTextMessageSizeLimit());
System.out.println("getUri:" + session.getUri().toString());
System.out.println("getPrincipal:" + session.getPrincipal());
System.out.println(soslistService.getsss());
session.sendMessage(new TextMessage(" hello "));
users.add(session);
}
@Override
public void handleTransportError(WebSocketSession session,
Throwable exception) throws Exception {
// Called when a message transfer error occurs
System.out.println("handleTransportError");
}
@Override
public void afterConnectionClosed(WebSocketSession session,
CloseStatus closeStatus) throws Exception {
// 1 Closed when the client connection is disconnected
System.out.println("afterConnectionClosed");
}
@Override
public boolean supportsPartialMessages() {
// TODO Auto-generated method stub
return false;
}
}