本篇主要描述一下spring的多線程的使用與定時任務的使用.
1.spring多線程任務的使用
spring通過任務執行器TaskExecutor來實現多線程與并發編程。通常使用ThreadPoolTaskExecutor來實現一個基于線程池的TaskExecutor.
首先你要實現AsyncConfigurer 這個接口,目的是開啟一個線程池
代碼如下:
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package com.foreveross.service.weixin.test.thread; import java.util.concurrent.Executor; import org.springframework.aop.interceptor.AsyncUncaughtExceptionHandler; import org.springframework.context.annotation.ComponentScan; import org.springframework.context.annotation.Configuration; import org.springframework.scheduling.annotation.AsyncConfigurer; import org.springframework.scheduling.annotation.EnableAsync; import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor; /** * 注入一個線程池 * @author mingge * */ @Configuration @ComponentScan ( "com.foreveross.service.weixin.test.thread" ) @EnableAsync public class TaskExecutorConfig implements AsyncConfigurer { @Override public Executor getAsyncExecutor() { ThreadPoolTaskExecutor taskExecutor= new ThreadPoolTaskExecutor(); taskExecutor.setCorePoolSize( 5 ); taskExecutor.setMaxPoolSize( 20 ); taskExecutor.setQueueCapacity( 25 ); taskExecutor.initialize(); return taskExecutor; } @Override public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() { return null ; } } |
然后注入一個類,實現你的業務,并在你的Bean的方法中使用@Async注解來聲明其是一個異步任務
代碼如下:
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package com.foreveross.service.weixin.test.thread; import org.springframework.scheduling.annotation.Async; import org.springframework.stereotype.Service; /** * 線程池任務 * @author mingge * */ @Service public class TaskService { @Async public void executeAsyncTask( int i){ System.out.println( "執行異步任務:" +i); } @Async public void executeAsyncTask1( int i){ System.out.println( "執行異步任務1:" +(i+i)); } } |
最后通過測試,可以看到你的實現是異步執行了.
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package com.foreveross.service.weixin.test.thread; import org.springframework.context.annotation.AnnotationConfigApplicationContext; /** * * @author mingge * */ public class Test { public static void main(String[] args) { AnnotationConfigApplicationContext context= new AnnotationConfigApplicationContext(TaskExecutorConfig. class ); TaskService taskService=context.getBean(TaskService. class ); for ( int i= 0 ;i< 20 ;i++){ taskService.executeAsyncTask(i); taskService.executeAsyncTask1(i); } //最后可以根據結果可以看出結果是并發執行而不是順序執行的呢 context.close(); } } |
2.spring定時任務的使用
在java原生態中,我們使用timer就可以了,這里小編說一些在Spring中的定時任務的使用
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package com.foreveross.service.weixin.test.thread; import org.springframework.context.annotation.ComponentScan; import org.springframework.context.annotation.Configuration; import org.springframework.scheduling.annotation.EnableScheduling; @Configuration @ComponentScan ( "com.foreveross.service.weixin.test.thread" ) @EnableScheduling //開啟對定時器的支持 public class TaskSchedulerConfig { } |
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package com.foreveross.service.weixin.test.thread; import java.util.Date; import org.springframework.scheduling.annotation.Scheduled; import org.springframework.stereotype.Service; @Service public class TimerTaskJob { @Scheduled (fixedRate= 2000 ) public void test(){ System.out.println( "我是定時任務:" + new Date().getSeconds()); } } |
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package com.foreveross.service.weixin.test.thread; import org.springframework.context.annotation.AnnotationConfigApplicationContext; public class TestTimer { public static void main(String[] args) { AnnotationConfigApplicationContext context= new AnnotationConfigApplicationContext(TaskSchedulerConfig. class ); //context.close(); } } |
以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支持服務器之家。
原文鏈接:http://www.cnblogs.com/huzi007/p/6219587.html