springMVC中实现定时器可在Controller中配置定时器

本章讲解springMVC中实现定时器，此时基于上一章eclipse搭建springmvc项目框架

文件结构

定时器所需jar

aopalliance-1.0.jar

步骤

1、springMVC-servlet.xml

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<?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:p="http://www.springframework.org/schema/p"  
    xmlns:context="http://www.springframework.org/schema/context"  
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:task="http://www.springframework.org/schema/task"  
    xsi:schemaLocation="    
    http://www.springframework.org/schema/beans     
    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd    
    http://www.springframework.org/schema/context    
    http://www.springframework.org/schema/context/spring-context-3.0.xsd    
    http://www.springframework.org/schema/mvc    
    http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd    
    http://www.springframework.org/schema/task     
    http://www.springframework.org/schema/task/spring-task-3.0.xsd">  
    <!-- 默认扫描的包路径 -->  
    <context:component-scan base-package="*" />  
  
    <!-- 添加注解驱动 -->  
    <mvc:annotation-driven />  
  
    <!-- 定义跳转的文件的前后缀 -->  
    <bean id="viewResolver"  
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">  
        <property name="prefix" value="/WEB-INF/views/" />  
        <property name="suffix" value=".jsp" />  
    </bean>  
  
    <task:executor id="executor" pool-size="5" />  
    <task:scheduler id="schedule" pool-size="10" />  
    <task:annotation-driven executor="executor"  
    scheduler="schedule" />  
  
</beans>  

注：添加了task

2、VendorTask.java

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package net.csdn.blog.springmvc.timer;  
  
import org.springframework.scheduling.annotation.Scheduled;  
import org.springframework.stereotype.Component;  
  
@Component  
public class VendorTask {  
  
    // private static Logger log = Logger.getLogger(VendorTask.class);  
  
    @Scheduled(fixedDelay = 5000)  
    public void doSomethingWithDelay() {  
        System.out.println("I'm doing with delay now!");  
    }  
  
    @Scheduled(fixedRate = 5000)  
    public void doSomethingWithRate() {  
        System.out.println("I'm doing with rate now!");  
    }  
  
    @Scheduled(cron = "0/5 * * ? * *")  
    public void doSomethingWithCron() {  
        System.out.println("I'm doing with cron now!");  
    }  
  
}  

注：cron效果为服务器启动之后每过5s钟执行一次，具体的写法可参考Spring定时器配置方式

3、效果

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@Component

@Controller

@RequestMapping(value="/serverinfo")

public class ServerInfoController extends BaseController implements ServletContextListener{

   @Scheduled(fixedDelay = 50000)  

    public void doSomethingWithDelay()  {

   

}

}