1、广播式WebSocket
前言
Github：https://github.com/HealerJean
1、导入依赖
<!--websocket-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
<?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>com.hlj.websocket</groupId>
<artifactId>com-hlj-websocket</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>com-hlj-websocket</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-rest</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!--websocket-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
2、springBoot开启Websocket支持
注解：EnableWebSocketMessageBroker
package com.hlj.websocket.WebSocket;
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;
/**
* 1 通过 @EnableWebSocketMessageBroker
* 开启使用stomp协议来传输 基于代理的 message broker,
* 这个时候控制器支持使用MessageMapping
* */
@Configuration
@EnableWebSocketMessageBroker //1
public class WebSocketConfig extends AbstractWebSocketMessageBrokerConfigurer {
/**
* 注册Stomp的协议的节点，并映射指定的url
* @param registry
*/
@Override
public void registerStompEndpoints(StompEndpointRegistry registry) {
//注册一个stomp的节点，并指定使用SockJS协议 ，提供给用户进行连接
//广播式
registry.addEndpoint("/endpointWisely").withSockJS();
}
/**
* 配置信息代理
* @param registry
*/
@Override
public void configureMessageBroker(MessageBrokerRegistry registry) {
//广播式应配置一个topic的消息代理 ，
//表示客户端订阅地址的前缀信息，也就是客户端接收服务端消息的地址的前缀信息，@SendTo("/topic/getResponse") 下文出现
registry.enableSimpleBroker("/topic"); //2
}
}
3、添加收发消息的Bean类
1、浏览器像服务端发送的消息的类
package com.hlj.websocket.WebSocket.domain;
/**
* 浏览器向服务器发送的消息，用这个接受
*/
public class WiselyMessage {
private String name;
public String getName(){
return name;
}
}
2、服务器向浏览器发送从此勒的消息
package com.hlj.websocket.WebSocket.domain;
/**
* 服务器向浏览器发送从此勒的消息
*/
public class WiselyResponse {
private String responseMessage;
public WiselyResponse(String responseMessage){
this.responseMessage = responseMessage;
}
public String getResponseMessage(){
return responseMessage;
}
}
4、添加控制器与用户交互
/**
*
* Created by HealerJean on 2017/4/8.
*/
@Controller
-------
public class WsController {
/**
* 广播式
*/
@MessageMapping("/welcome")//客户端浏览器用户发送信息时候的地址
@SendTo("/topic/getResponse") //服务器有消息时候，会对订阅了这个路径中的浏览器发送消息
public WiselyResponse say(WiselyMessage message) throws Exception{
Thread.sleep(3000);
return new WiselyResponse("welcome,"+message.getName());
}
}
5、客户端 页面，注意观察里面的JS 函数
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8" />
<title>Spring Boot+WebSocket+广播式</title>
</head>
<body onload="disconnect()">
<noscript><h2 style="color: #ff0000">貌似你的浏览器不支持websocket</h2></noscript>
<div>
<div>
<button id="connect" onclick="connect();">连接</button>
<button id="disconnect" disabled="disabled" onclick="disconnect();">断开连接</button>
</div>
<div id="conversationDiv">
<label>输入你的名字</label><input type="text" id="name" />
<button id="sendName" onclick="sendName();">发送</button>
<p id="response"></p>
</div>
</div>
<script th:src="@{sockjs.min.js}"></script>
<script th:src="@{stomp.min.js}"></script>
<script th:src="@{jquery.js}"></script>
<script type="text/javascript">
var stompClient = null;
function setConnected(connected) {
document.getElementById('connect').disabled = connected;
document.getElementById('disconnect').disabled = !connected;
document.getElementById('conversationDiv').style.visibility = connected ? 'visible' : 'hidden';
$('#response').html();
}
function connect() {
var socket = new SockJS('/endpointWisely'); //1
stompClient = Stomp.over(socket);
stompClient.connect({}, function(frame) {
setConnected(true);
console.log('Connected: ' + frame);
stompClient.subscribe('/topic/getResponse', function(respnose){ //2
showResponse(JSON.parse(respnose.body).responseMessage);
});
});
}
function disconnect() {
if (stompClient != null) {
stompClient.disconnect();
}
setConnected(false);
console.log("Disconnected");
}
function sendName() {
var name = $('#name').val();
//3
stompClient.send("/welcome", {}, JSON.stringify({ 'name': name }));
}
function showResponse(message) {
var response = $("#response");
response.html(message);
}
</script>
</body>
</html>
代码和后面的点对点一起下载
