<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>org.springframework</groupId> <artifactId>gs-messaging-stomp-websocket</artifactId> <version>0.1.0</version> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.4.2.RELEASE</version> </parent> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <exclusions> <exclusion> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-tomcat</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jetty</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-websocket</artifactId> <exclusions> <exclusion> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.webjars</groupId> <artifactId>webjars-locator</artifactId> </dependency> <dependency> <groupId>org.webjars</groupId> <artifactId>sockjs-client</artifactId> <version>1.0.2</version> </dependency> <dependency> <groupId>org.webjars</groupId> <artifactId>stomp-websocket</artifactId> <version>2.3.3</version> </dependency> <dependency> <groupId>org.webjars</groupId> <artifactId>bootstrap</artifactId> <version>3.3.7</version> </dependency> <dependency> <groupId>org.webjars</groupId> <artifactId>jquery</artifactId> <version>3.1.0</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <properties> <java.version>1.8</java.version> </properties> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build></project>去掉了默認的tomcat，采用jetty2.采用stomp消息格式，定義接收的消息和發送的消息bean
客戶端發送的消息
package hello;public class Greeting { private String content; public Greeting() { } public Greeting(String content) { this.content = content; } public String getContent() { return content; }}服務器發送給客戶端的消息package hello;public class HelloMessage { private String name; public HelloMessage() { } public HelloMessage(String name) { this.name = name; } public String getName() { return name; } public void setName(String name) { this.name = name; }}3，消息處理handlerpackage hello;import org.springframework.messaging.handler.annotation.MessageMapping;import org.springframework.messaging.handler.annotation.SendTo;import org.springframework.stereotype.Controller;@Controllerpublic class GreetingController { @MessageMapping("/hello") @SendTo("/topic/greetings") public Greeting greeting(HelloMessage message) throws Exception { Thread.sleep(1000); // simulated delay return new Greeting("Hello, " + message.getName() + "!"); }}4對websocket類進行配置
package hello;import org.springframework.context.annotation.Configuration;import org.springframework.messaging.simp.config.MessageBrokerRegistry;import org.springframework.web.socket.config.annotation.AbstractWebSocketMessageBrokerConfigurer;import org.springframework.web.socket.config.annotation.EnableWebSocketMessageBroker;import org.springframework.web.socket.config.annotation.StompEndpointRegistry;@Configuration@EnableWebSocketMessageBrokerpublic class WebSocketConfig extends AbstractWebSocketMessageBrokerConfigurer { @Override public void configureMessageBroker(MessageBrokerRegistry config) { config.enableSimpleBroker("/topic"); config.setapplicationDestinationPrefixes("/app"); } @Override public void registerStompEndpoints(StompEndpointRegistry registry) { registry.addEndpoint("/gs-guide-websocket").withSockJS(); }}創建客戶端app.js和index.html
app.js文件如下：
var stompClient = null;function setConnected(connected) { $("#connect").prop("disabled", connected); $("#disconnect").prop("disabled", !connected); if (connected) { $("#conversation").show(); } else { $("#conversation").hide(); } $("#greetings").html("");}function connect() { var socket = new SockJS('/gs-guide-websocket'); stompClient = Stomp.over(socket); stompClient.connect({}, function (frame) { setConnected(true); console.log('Connected: ' + frame); stompClient.subscribe('/topic/greetings', function (greeting) { showGreeting(JSON.parse(greeting.body).content); }); });}function disconnect() { if (stompClient != null) { stompClient.disconnect(); } setConnected(false); console.log("Disconnected");}function sendName() { stompClient.send("/app/hello", {}, JSON.stringify({'name': $("#name").val()}));}function showGreeting(message) { $("#greetings").append("<tr><td>" + message + "</td></tr>");}$(function () { $("form").on('submit', function (e) { e.preventDefault(); }); $( "#connect" ).click(function() { connect(); }); $( "#disconnect" ).click(function() { disconnect(); }); $( "#send" ).click(function() { sendName(); });});![]()
點解connect即與服務器建立連接，在輸入框輸入任何消息，點擊send,發送給服務器，會獲得服務器的響應，
三、服務器主動發消息給客戶端
服務器主動發消息給客戶端通過
最后，服務器主動發消息給客戶端
通過SimpleMessagingTemplate類實現
@RestControllerpublic%20class%20TestController%20{%20%20%20%20@Autowired%20%20%20%20private%20SimpMessagingTemplate%20template;%20%20%20%20@RequestMapping(value%20=%20"/test",method%20=%20RequestMethod.GET)%20%20%20%20public%20String%20test(){%20%20%20%20%20%20%20%20template.convertAndSend("/topic/greetings",new%20Greeting("hello"));%20%20%20%20%20%20%20%20return%20"hello";%20%20%20%20}}調用http://localhost:8080/test,會看到消息發給了客戶端
以上就是對springboot服務端進行消息推送的大致介紹。不過目前似乎消息推送系統go或nodejs版本很流行。nodejs+socketio. java服務端可以調用消息推送系統接口實現消息發送到客戶端。歡迎討論。O(∩_∩)O~
