Java中Spring WebSocket详解

2023-09-19 02:21:05 52

首先pom.xml


	org.springframework.boot
	spring-boot-starter-parent
	1.5.8.RELEASE


	org.apache.commons
	commons-io


	javax.websocket
	javax.websocket-api
	1.0
	provided


	org.springframework
	spring-websocket


	org.springframework.boot
	spring-boot-starter-web
	
		
			org.springframework.boot
			spring-boot-starter-tomcat
		
	


	org.springframework.boot
	spring-boot-starter-undertow

接收消息后的处理类GameHandler:

importjava.net.URI;
importorg.springframework.web.socket.BinaryMessage;
importorg.springframework.web.socket.CloseStatus;
importorg.springframework.web.socket.PongMessage;
importorg.springframework.web.socket.TextMessage;
importorg.springframework.web.socket.WebSocketSession;
importorg.springframework.web.socket.handler.AbstractWebSocketHandler;

publicclassGameHandlerextendsAbstractWebSocketHandler{
/**
*处理字符串类的信息
*
*@paramsession
*@parammessage
*@throwsException
*/
@Override
protectedvoidhandleTextMessage(WebSocketSessionsession,TextMessagemessage)throwsException{
session.sendMessage(newTextMessage(message.asBytes()));
}

/**
*处理二进制类的信息
*
*@paramsession
*@parammessage
*@throwsException
*/
@Override
protectedvoidhandleBinaryMessage(WebSocketSessionsession,BinaryMessagemessage)throwsException{
session.sendMessage(newBinaryMessage(message.getPayload()));
}

/**
*ping-pong
*
*@paramsession
*@parammessage
*@throwsException
*/
@Override
protectedvoidhandlePongMessage(WebSocketSessionsession,PongMessagemessage)throwsException{
	
}
/**
*传出错误的处理
*
*@paramsession
*@paramexception
*@throwsException
*/
@Override
publicvoidhandleTransportError(WebSocketSessionsession,Throwableexception)throwsException{
}
/**
*连接关闭的处理
*
*@paramsession
*@paramstatus
*@throwsException
*/
@Override
publicvoidafterConnectionClosed(WebSocketSessionsession,CloseStatusstatus)throwsException{
}
/**
*连接建立后的处理
*
*@paramsession
*@throwsException
*/
@Override
publicvoidafterConnectionEstablished(WebSocketSessionsession)throwsException{	
}
}

握手信息拦截器WebSocketHandshakeInterceptor:

importjava.util.Map;
importjavax.servlet.http.Cookie;
importorg.springframework.http.server.ServerHttpRequest;
importorg.springframework.http.server.ServerHttpResponse;
importorg.springframework.http.server.ServletServerHttpRequest;
importorg.springframework.web.socket.WebSocketHandler;
importorg.springframework.web.socket.server.HandshakeInterceptor;

publicclassWebSocketHandshakeInterceptorimplementsHandshakeInterceptor{
@Override
publicbooleanbeforeHandshake(ServerHttpRequestrequest,ServerHttpResponseshr1,WebSocketHandlerwsh,Mapattributes)throwsException{
//此处可以做一些权限认证的事情或者其他
returntrue;
}
@Override
publicvoidafterHandshake(ServerHttpRequestshr,ServerHttpResponseshr1,WebSocketHandlerwsh,Exceptionexcptn){	
}
}

使用WebSocket的配置类WebSocketConfig:

importorg.springframework.context.annotation.Bean;
importorg.springframework.context.annotation.Configuration;
importorg.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
importorg.springframework.web.socket.config.annotation.EnableWebSocket;
importorg.springframework.web.socket.config.annotation.WebSocketConfigurer;
importorg.springframework.web.socket.config.annotation.WebSocketHandlerRegistry;

@Configuration
@EnableWebSocket
publicclassWebSocketConfigextendsWebMvcConfigurerAdapterimplementsWebSocketConfigurer{
@Override
publicvoidregisterWebSocketHandlers(WebSocketHandlerRegistryregistry){
//允许连接的域,只能以http或https开头
String[]allowsOrigins={"http://127.0.0.1:1213","http://localhost:1213"};
registry.addHandler(gameHandler(),"/game").addInterceptors(handshakeInterceptor()).setAllowedOrigins(allowsOrigins);
}
@Bean
publicGameHandlergameHandler(){
returnnewGameHandler();
}
@Bean
publicWebSocketHandshakeInterceptorhandshakeInterceptor(){
returnnewWebSocketHandshakeInterceptor();
}
}

启动类Launcher:

@SpringBootApplication
publicclassLauncher{
publicstaticvoidmain(String[]params){
SpringApplication.run(Launcher.class,params);
	}
}

配置文件main/resources/application.properties:

server.port=1213
server.session-timeout=1800
server.undertow.io-threads=4
server.undertow.worker-threads=20
server.undertow.buffer-size=1024
server.undertow.buffers-per-region=1024
server.undertow.direct-buffers=true

前端的测试页面main\resources\static\index.html







PlatformGateway










WebSocketTestPage



WebSocketAddress:

ws://127.0.0.1:1213/

连接

断开

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Java中Spring WebSocket详解

WebSocketTestPage

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