Spring Boot笔记-利用Quartz进行定时任务，利用websocket推送到浏览器（界面为thymeleaf）

旧城等待， 2022-11-10 01:22 80阅读 0赞

效果如下，浏览器输入URL：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxNzg0NDI3NjE_size_16_color_FFFFFF_t_70][]

等待一段时间，websocket主动推送

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxNzg0NDI3NjE_size_16_color_FFFFFF_t_70 1][]

后端打印：

![20210316084333384.png][]

程序结构如下：

![20210316084343367.png][]

QuartzConfig.java

@Configuration
    public class QuartzConfig {
    
        @Bean
        public JobDetail job(){
    
            return JobBuilder.newJob(QuartzJob.class).storeDurably().build();
        }
    
        @Bean
        public Trigger trigger(){
    
            CronScheduleBuilder scheduleBuilder = CronScheduleBuilder.cronSchedule("*/30 * * * * ?");
    
            return TriggerBuilder.newTrigger()
                    .forJob(job())
                    .withSchedule(scheduleBuilder)
                    .build();
        }
    }

WebSocketConfig.java

@Component
    public class WebSocketConfig {
    
        @Bean
        public ServerEndpointExporter serverEndpointExporter(){
    
            return new ServerEndpointExporter();
        }
    }

MyController.java

@Controller
    public class MyController {
    
        @GetMapping("/")
        public String test(){
    
            return "index";
        }
    }

QuartzJob.java

public class QuartzJob extends QuartzJobBean {
    
        @Autowired
        GoodsRepository goodsRepository;
    
        @Autowired
        WebSocket webSocket;
    
        @Override
        protected void executeInternal(JobExecutionContext jobExecutionContext) throws JobExecutionException {
    
            String str = "";
    
            for(Goods goods : goodsRepository.getGoodsArrayList()){
    
                str += goods.toString();
            }
    
            webSocket.onMessage(str);
        }
    }

Goods.java

@Data
    public class Goods {
    
        Integer id;
        String name;
        Integer count;
    }

GoodsRepository.java

@Repository
    public class GoodsRepository {
    
        private static ArrayList<Goods> goodsArrayList = new ArrayList<>();
    
        static {
    
            Goods goods1 = new Goods();
            goods1.setId(1);
            goods1.setName("石油50L");
            goods1.setCount(100);
            goodsArrayList.add(goods1);
    
            Goods goods2 = new Goods();
            goods2.setId(1);
            goods2.setName("石油150L");
            goods2.setCount(100);
            goodsArrayList.add(goods2);
    
            Goods goods3 = new Goods();
            goods3.setId(1);
            goods3.setName("石油250L");
            goods3.setCount(100);
            goodsArrayList.add(goods3);
    
            Goods goods4 = new Goods();
            goods4.setId(1);
            goods4.setName("石油300L");
            goods4.setCount(100);
            goodsArrayList.add(goods4);
        }
    
        public ArrayList<Goods> getGoodsArrayList(){
    
            return goodsArrayList;
        }
    }

WebSocket.java

@Component
    @ServerEndpoint("/websocket")
    public class WebSocket {
    
        //与某个客户端连接对话，通过此对客户端发送消息
        private Session session;
    
        //存放所有连接的客户端
        private static ConcurrentLinkedQueue<WebSocket> concurrentLinkedQueue = new ConcurrentLinkedQueue<>();
    
        @OnOpen
        public void onOpen(Session session){
    
            //默认客户端，没有重名
            this.session = session;
            concurrentLinkedQueue.add(this);
            System.out.println("【webSocket连接成功】当前连接人数为：" + concurrentLinkedQueue.size());
        }
    
        @OnClose
        public void onClose() {
    
            Iterator<WebSocket> iterator = concurrentLinkedQueue.iterator();
            while (iterator.hasNext()){
    
                WebSocket next = iterator.next();
                if(next == this){
    
                    concurrentLinkedQueue.remove(next);
                }
            }
        }
    
        @OnError
        public void onError(Session session, Throwable throwable){
    
            System.out.println("error:");
            throwable.printStackTrace();
        }
    
        @OnMessage
        public void onMessage(String message){
    
    
            Iterator<WebSocket> iterator = concurrentLinkedQueue.iterator();
            while (iterator.hasNext()){
    
                WebSocket next = iterator.next();
                try {
    
                    next.session.getBasicRemote().sendText(message);
                }
                catch (IOException e) {
    
                    e.printStackTrace();
                }
            }
        }
    
    }

DemoApplication.java

@SpringBootApplication
    public class DemoApplication {
    
        public static void main(String[] args) {
            SpringApplication.run(DemoApplication.class, args);
        }
    
    }

index.html

<!DOCTYPE html>
    <html lang="en" xmlns:th="http://www.thymeleaf.org">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
    
        <script type="text/javascript">
    
            let ws = null;
    
            window.onload=function(){
    
                WebSocketTest();
            }
    
            function WebSocketTest()
            {
                if ("WebSocket" in window)
                {
                    alert("浏览器支持 WebSocket!");
    
                    // 打开一个 web socket
                    ws = new WebSocket("ws://127.0.0.1:8080/websocket");
                    ws.onmessage = function (evt)
                    {
                        let received_msg = evt.data;
                        alert("接收推送数据：" + received_msg);
                    };
    
                    ws.onclose = function()
                    {
                        // 关闭 websocket
                        alert("连接已关闭...");
                    };
                }
    
                else
                {
                    // 浏览器不支持 WebSocket
                    alert("浏览器不支持 WebSocket!");
                }
            }
    
        </script>
    
    </head>
    <body>
    
    <h1>推送页面</h1>
    
    </body>
    </html>

源码打包下载地址：

[https://github.com/fengfanchen/Java/tree/master/QuartzDemo][https_github.com_fengfanchen_Java_tree_master_QuartzDemo]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxNzg0NDI3NjE_size_16_color_FFFFFF_t_70]: /images/20221023/ff177939f2d24a91929f859706739e38.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxNzg0NDI3NjE_size_16_color_FFFFFF_t_70 1]: /images/20221023/72604cde9a934bdcb1a9b1ab14eb8244.png
[20210316084333384.png]: /images/20221023/d91795359df8462dba107796dcb90d4a.png
[20210316084343367.png]: /images/20221023/24cbb851326346be809fa8e99651725d.png
[https_github.com_fengfanchen_Java_tree_master_QuartzDemo]: https://github.com/fengfanchen/Java/tree/master/QuartzDemo