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 ;
}
}
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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));
}
}
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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();
}
}
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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();
}
}
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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