Spring注解方式實現定時器


一、springmvc.xml中添加以下配置

  1、beans添加xmlnx:task

xmlns:task="http://www.springframework.org/schema/task" 

  2、xsi:schemaLocation中添加

http://www.springframework.org/schema/task  
http://www.springframework.org/schema/task/spring-task-4.1.xsd

 

  3、核心配置

  (1)方法一:

 <context:annotation-config /> 
 <!-- spring掃描注解的配置(要掃描的包,即定時器所在包) -->
 <context:component-scan base-package="com.qiyuan.listener" /> 
   
<!-- 開啟這個配置,spring才能識別@Scheduled注解 --> <task:annotation-driven scheduler="qbScheduler" mode="proxy"/> <task:scheduler id="qbScheduler" pool-size="10"/>

  說明:理論上只需要加上<task:annotation-driven />這句配置就可以了,這些參數都不是必須的(見方法二)。

  (2)方法二

<!-- task任務注解掃描包(定時器開關) -->
<task:annotation-driven/> <!-- 用定時器注解 -->
     
<!-- 掃描位置是 -->
<context:annotation-config/>  
<bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor"/> 
<context:component-scan base-package="com.qiyuan.listener"/>  

 

二、定時任務Java代碼

  (1)接口和實現類

package com.qiyuan.listener;

public interface Test {

    public void myTest1(); 
    
    public void myTest2(); 
    
    public void myTest3();
    
    public void myTest4();
    
}

 

package com.qiyuan.listener;

import java.text.SimpleDateFormat;
import java.util.Date;

import javax.annotation.Resource;

import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

import com.qiyuan.bean.TRate;
import com.qiyuan.service.AnalysticService;
import com.qiyuan.service.CenterPurseService;
import com.qiyuan.service.OrderService;
import com.qiyuan.service.RateService;
import com.qiyuan.util.RateUtil;


@Component
public class TestImp implements Test {

    @Resource
    private RateService rateServiceImp;
    @Resource
    private CenterPurseService centerPurseServiceImp;
    @Resource
    private OrderService orderServiceImp;
    @Resource
    private AnalysticService analysticServiceImp;
    
    int count1 = 0;
    int count2 = 0;
    int count3 = 0;
    int count4 = 0;
    
    @Scheduled(cron="0 */5 * * * ?")   //每5分鍾執行一次  
    @Override
    public void myTest1() {
        System.out.println("進入測試定時器1");  
        ++count1;
        System.out.println("定時器1:時間=" + new Date() + " 執行了" + count1 + "次"); // 1次
        //查詢各種幣的匯率
        TRate tRate=new TRate();
        tRate.setRate(1);
        tRate.setYkcrate(RateUtil.YKC());
        tRate.setBtcrate(RateUtil.BTC());
        tRate.setLtcrate(RateUtil.LTC());
        tRate.setEthrate(RateUtil.ETH());
        tRate.setLastmodify(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()));
        System.out.println("==========匯率"+tRate);
        //更新匯率表
        rateServiceImp.updateRate(tRate);
        //查詢錢包充值記錄,更新用戶錢包
        centerPurseServiceImp.searchPurseChargeRecord();
    }

    
    @Scheduled(cron="0 0 2 * * ?")   //每天凌晨一點執行一次  
    @Override
    public void myTest2() {
        System.out.println("進入測試定時器2");  
        ++count2;
        System.out.println("定時器2:時間=" + new Date() + " 執行了" + count2 + "次"); // 1次
        //每天凌晨1點:超過7天已發貨但未收貨的讓系統自動收貨
        orderServiceImp.autoAcceptOrder();
    }
    

    @Scheduled(cron="0 0 2 * * ?")   //每天凌晨兩點執行一次  
    @Override
    public void myTest3() {
        System.out.println("進入測試定時器3");  
        ++count3;
        System.out.println("定時器3:時間=" + new Date() + " 執行了" + count3 + "次"); // 1次
        //每天凌晨1點統計前一天的數據
        analysticServiceImp.insertAnalystic();
    }
    
    
    @Scheduled(cron = "0 0 3 1 * ?")   //每個月1號凌晨三點執行一次
    public void myTest4(){
        System.out.println("進入測試定時器4");  
        ++count4;
        System.out.println("定時器3:時間=" + new Date() + " 執行了" + count4 + "次"); // 1次
        //每個月1號凌晨三點清空臨時訂單表的數據
        orderServiceImp.deleteAllTempOrder();
    }

}

 

三、擴展資料

  關於@Scheduled注解,查看源文件中該注解的定義

@Target({java.lang.annotation.ElementType.METHOD, java.lang.annotation.ElementType.ANNOTATION_TYPE})  
@Retention(RetentionPolicy.RUNTIME)  
@Documented  
public @interface Scheduled  
{  
  public abstract String cron();  
  
  public abstract long fixedDelay();  
  
  public abstract long fixedRate();  
}

  參數具體介紹見:

  (1)理解 Spring 定時任務的 fixedRate 和 fixedDelay 的區別

  

  (2)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

<?xml version="1.0" encoding="UTF-8"?><beansxmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:p="http://www.springframework.org/schema/p"xmlns:aop="http://www.springframework.org/schema/aop"xmlns:context="http://www.springframework.org/schema/context"xmlns:mvc="http://www.springframework.org/schema/mvc"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.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop-4.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsdhttp://www.springframework.org/schema/task  http://www.springframework.org/schema/task/spring-task-4.1.xsd  " ><!-- 掃描:通知spring容器采用自動掃描機制查找注解的bean --><context:component-scan base-package="com.qiyuan.controller"/>
<!-- 默認加載方法,啟動時加載 (定時器的另外一種方法)--><!-- <bean id="templateAnnotationInit1" class="com.qiyuan.listener.TestTimer1" init-method="showTimer1" /><bean id="templateAnnotationInit2" class="com.qiyuan.listener.TestTimer2" init-method="showTimer2" /><bean id="templateAnnotationInit3" class="com.qiyuan.listener.TestTimer3" init-method="showTimer3" /> --><!-- task任務注解掃描包(定時器開關) --><task:annotation-driven/> <!-- 用定時器注解 -->  <!-- 掃描位置是 --><context:annotation-config/>      <bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor"/>     <context:component-scan base-package="com.qiyuan.listener"/>  <!--開啟springmvc 注解 --><mvc:annotation-driven>  <mvc:message-converters>           <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"></bean>       </mvc:message-converters></mvc:annotation-driven><!-- 視圖解析器 --><bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">   <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property>   <property name="prefix" value="/WEB-INF/jsp/"></property>   <property name="suffix" value=".jsp"></property></bean><!-- 前台攔截器 --><mvc:interceptors>     <mvc:interceptor>      <!-- 過濾全部請求 -->          <mvc:mapping path="/**"/>          <!--  除了此請求 -->          <mvc:exclude-mapping path="/login/*"/>          <mvc:exclude-mapping path="/item/*"/>          <mvc:exclude-mapping path="/analystic/*"/>          <mvc:exclude-mapping path="/members/*"/>          <mvc:exclude-mapping path="/itemMage/*"/>          <mvc:exclude-mapping path="/back_order/*"/>          <mvc:exclude-mapping path="/back_order1/*"/>          <mvc:exclude-mapping path="/logistics/*"/>          <mvc:exclude-mapping path="/product/*"/>          <mvc:exclude-mapping path="/admin/*"/>          <bean class="com.qiyuan.interceptor.MyHandlerInterceptor"></bean>     </mvc:interceptor></mvc:interceptors><!-- 后台(管理員)攔截器 --><mvc:interceptors>     <mvc:interceptor>      <!-- 過濾全部請求 -->          <mvc:mapping path="/**"/>          <!--  除了此請求 -->          <mvc:exclude-mapping path="/login/*"/>          <mvc:exclude-mapping path="/centerAddress/*"/>          <mvc:exclude-mapping path="/centerOrder/*"/>          <mvc:exclude-mapping path="/centerPurse/*"/>          <mvc:exclude-mapping path="/centerScore/*"/>          <mvc:exclude-mapping path="/centerTeam/*"/>          <mvc:exclude-mapping path="/item/*"/>          <mvc:exclude-mapping path="/order/*"/>          <mvc:exclude-mapping path="/shopCar/*"/>          <mvc:exclude-mapping path="/userCenter/*"/>          <mvc:exclude-mapping path="/back_order1/*"/>          <bean class="com.qiyuan.interceptor.MyHandlerInterceptor_back"></bean>     </mvc:interceptor></mvc:interceptors><!-- 后台(供應商)攔截器 --><mvc:interceptors>     <mvc:interceptor>      <!-- 過濾全部請求 -->          <mvc:mapping path="/**"/>          <!--  除了此請求 -->          <mvc:exclude-mapping path="/login/*"/>          <mvc:exclude-mapping path="/centerAddress/*"/>          <mvc:exclude-mapping path="/analystic/*"/>          <mvc:exclude-mapping path="/centerOrder/*"/>          <mvc:exclude-mapping path="/centerPurse/*"/>          <mvc:exclude-mapping path="/centerScore/*"/>          <mvc:exclude-mapping path="/centerTeam/*"/>          <mvc:exclude-mapping path="/item/*"/>          <mvc:exclude-mapping path="/order/*"/>          <mvc:exclude-mapping path="/shopCar/*"/>          <mvc:exclude-mapping path="/userCenter/*"/>          <mvc:exclude-mapping path="/admin/*"/>          <mvc:exclude-mapping path="/itemMage/*"/>          <mvc:exclude-mapping path="/logistics/*"/>          <mvc:exclude-mapping path="/members/*"/>          <mvc:exclude-mapping path="/back_order/*"/>          <mvc:exclude-mapping path="/product/*"/>          <bean class="com.qiyuan.interceptor.MyHandlerInterceptor_back1"></bean>     </mvc:interceptor></mvc:interceptors><!-- 文件上傳 --><bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">   <property name="defaultEncoding" value="UTF-8"></property><property name="maxUploadSize" value="99999999999"></property><property name="resolveLazily" value="true"></property></bean>
</beans>


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