本篇主要描述一下spring的多线程的使用与定时任务的使用.
1.spring多线程任务的使用
spring通过任务执行器TaskExecutor来实现多线程与并发编程。通常使用ThreadPoolTaskExecutor来实现一个基于线程池的TaskExecutor.
首先你要实现AsyncConfigurer 这个接口,目的是开启一个线程池
代码如下:
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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; /** * 注入一个线程池 * @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 ; } } |
然后注入一个类,实现你的业务,并在你的Bean的方法中使用@Async注解来声明其是一个异步任务
代码如下:
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package com.foreveross.service.weixin.test.thread; import org.springframework.scheduling.annotation.Async; import org.springframework.stereotype.Service; /** * 线程池任务 * @author mingge * */ @Service public class TaskService { @Async public void executeAsyncTask( int i){ System.out.println( "执行异步任务:" +i); } @Async public void executeAsyncTask1( int i){ System.out.println( "执行异步任务1:" +(i+i)); } } |
最后通过测试,可以看到你的实现是异步执行了.
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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); } //最后可以根据结果可以看出结果是并发执行而不是顺序执行的呢 context.close(); } } |
2.spring定时任务的使用
在java原生态中,我们使用timer就可以了,这里小编说一些在Spring中的定时任务的使用
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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 //开启对定时器的支持 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( "我是定时任务:" + 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内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:http://www.cnblogs.com/huzi007/p/6219587.html