spring容器加载完成之后进行开启一个线程进行数据更新操作

桃扇骨 2022-05-24 02:47 119阅读 0赞

需求:最近做项目遇到了一个需求，数据表中有些数据需要定时更新，这样就需要启动一个线程完成，不想再新建一个项目来完成这些事，就想在spring启动之后来开启一个线程定时来完成这件事 ,直接上代码

package com.irisian.picturelabel.listener;
    
    import com.irisian.picturelabel.service.PictureService;
    import com.irisian.picturelabel.service.TaskService;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.beans.factory.InitializingBean;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Component;
    
    /**
     * Author:吴满心
     * Date:2018/5/18
     * Function:负责在spring容器加载完成之后进行图片和任务数据表的更新
     */
    @Component
    public class SpringFinishedListener implements InitializingBean {
        private static final Logger logger = LoggerFactory.getLogger(SpringFinishedListener.class);
    
        @Autowired
        private PictureService pictureService;
    
        @Autowired
        private TaskService taskService;
    
        @Override
        public void afterPropertiesSet() throws Exception {
            new Thread(() -> {
                while (true) {
                    logger.info("开始执行图片和任务的更新操作!");
                    try {
                        pictureService.updatePictureStatus();
                        //更新任务的完成状态信息
                        taskService.updateFinishStatus();
                    } catch (Exception e) {
                        e.printStackTrace();
                        logger.error(e.getMessage());
                    }
                    try {
                        Thread.sleep(1800000);      //30分钟执行一次进行数据更新
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                        logger.error(e.getMessage());
                    }
                }
            }).start();
    
    
        }
    }

开始还尝试过servlet的方法，如

<table> 
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 <tr> 
 <td>package com.irisian.picturelabel.servlet; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; /** &nbsp;* Author:吴满心 &nbsp;* Date:2018/5/18 &nbsp;* Function: &nbsp;*/ @WebServlet(name = "backServlet", urlPatterns = { "/backServlet"}) public class BackServlet extends HttpServlet { &nbsp;&nbsp;&nbsp;&nbsp;private static final Logger logger= LoggerFactory.getLogger(BackServlet.class); &nbsp;&nbsp;&nbsp;&nbsp;@Override &nbsp;&nbsp;&nbsp;&nbsp;public void init() throws ServletException { &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;new Thread(()-&gt;{ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;while(true){ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;logger.info("我5秒钟执行一次"); &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;try { &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Thread.sleep(5000); &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;} catch (InterruptedException e) { &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;logger.error(e.getMessage()); &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;} &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;} &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}).start(); &nbsp;&nbsp;&nbsp;&nbsp;} &nbsp;&nbsp;&nbsp;&nbsp;@Override &nbsp;&nbsp;&nbsp;&nbsp;public void destroy() { &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;logger.info("服务器关闭了"); &nbsp;&nbsp;&nbsp;&nbsp;} }配置Configurationpackage com.irisian.picturelabel.configuration; import com.irisian.picturelabel.exception.MyExceptionResolver; import com.irisian.picturelabel.servlet.BackServlet; import org.springframework.boot.web.servlet.ServletRegistrationBean; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.HandlerExceptionResolver; /** &nbsp;* Author:吴满心 &nbsp;* Date:2018/5/15 &nbsp;* Function: &nbsp;*/ @Configuration public class SpringConfiguration { &nbsp;&nbsp;&nbsp;&nbsp;@Bean &nbsp;&nbsp;&nbsp;&nbsp;public HandlerExceptionResolver getHandlerExceptionResolver() { &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return new MyExceptionResolver(); &nbsp;&nbsp;&nbsp;&nbsp;} &nbsp;&nbsp;&nbsp;&nbsp;/** &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;* 配置一个后台运行的servlet &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;* @return &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*/ &nbsp;&nbsp;&nbsp;&nbsp;@Bean &nbsp;&nbsp;&nbsp;&nbsp;public ServletRegistrationBean servletRegistrationBean() { &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new BackServlet(), "/backServlet"); &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;servletRegistrationBean.setLoadOnStartup(1); &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;//数字越小，启动优先级越高，但是必须大于0 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return servletRegistrationBean; &nbsp;&nbsp;&nbsp;&nbsp;} } </td> 
 </tr> 
 </tbody> 
</table>

但是不满足spring启动之后，spring不启动完成，就无法使用bean了，所以就按照前面的一种方法了