【Spring MVC】定时任务 spring xml 定时任务配置设置 listener 项目启动时启动

待我称王封你为后i 2022-05-23 07:24 291阅读 0赞

## 欢迎转载：[攻城狮不是猫][Link 1] ##

## 1、编写 listener 监听类 ##

import com.xxx.xxxx.scheduledtasks.ScheduledTasks;
    import org.springframework.web.context.support.WebApplicationContextUtils;
    import javax.servlet.ServletContextEvent;
    import javax.servlet.ServletContextListener;
    
    public class TaskListener implements ServletContextListener  {
        @Override
        public void contextInitialized(ServletContextEvent sce) {
            //获得定时任务bean 项目启动时启动
            ScheduledTasks scheduledTasks = WebApplicationContextUtils.getWebApplicationContext(sce.getServletContext()).getBean(ScheduledTasks.class);
            scheduledTasks.taskWebServiceCheck();
        }
    
        @Override
        public void contextDestroyed(ServletContextEvent sce) {
    
        }
    }

## 3、编写定时任务类（@Component不要丢了） ##

@Component
    public class ScheduledTasks {
        private static final Logger logger = LoggerFactory.getLogger(ScheduledTasks.class);
        //@Scheduled(fixedRate = 1000 * 60 * 10)
        public void taskWebServiceCheck(){
           //定时任务执行内容
        }    }

##  ##

@Scheduled(fixedRate = 60000)//基于注解方式 这是每隔一分钟执行一次
    public void getServerInfoLog(){
        //定时任务执行内容
    
    }

##     ##

## 3、编写监听 ##

注意这个监听要在spring的监听后面否则上面的监听类会加载不到类 org.springframework.web.context.ContextLoaderListener

<listener>
       <listener-class>com.wengine.bgmanage.listener.TaskListener</listener-class>
    </listener>

## 5、配置定时任务xml （红色字部分需要） ##

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop" xmlns:p="http://www.springframework.org/schema/p"
       xmlns:tx="http://www.springframework.org/schema/tx" xmlns:task="http://www.springframework.org/schema/task"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                      http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
                      http://www.springframework.org/schema/context
                      http://www.springframework.org/schema/context/spring-context-4.1.xsd
                      http://www.springframework.org/schema/aop
                      http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
                      http://www.springframework.org/schema/tx
                      http://www.springframework.org/schema/tx/spring-tx-4.1.xsd
                      http://www.springframework.org/schema/task
                      http://www.springframework.org/schema/task/spring-task-4.1.xsd
                      http://www.springframework.org/schema/util
                      http://www.springframework.org/schema/util/spring-util-4.0.xsd">
    
       
       <context:annotation-config />
    
       
       <task:annotation-driven />
       
       <context:component-scan base-package="com.xxxx.xxxx.scheduledtasks" />
       
       <bean id="scheduledTasks" class="com.xxxx.xxxx.scheduledtasks.ScheduledTasks"></bean>
       
       <task:scheduled-tasks>
          <task:scheduled ref="scheduledTasks" method="taskWebServiceCheck" cron="0 0/5 * * * ?" />
       </task:scheduled-tasks>
    </beans>

[Link 1]: http://www.jsdblog.com/article/105