详解spring多线程与定时任务
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:
packagecom.foreveross.service.weixin.test.thread;
importjava.util.concurrent.Executor;
importorg.springframework.aop.interceptor.AsyncUncaughtExceptionHandler;
importorg.springframework.context.annotation.ComponentScan;
importorg.springframework.context.annotation.Configuration;
importorg.springframework.scheduling.annotation.AsyncConfigurer;
importorg.springframework.scheduling.annotation.EnableAsync;
importorg.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
/**
*注入一个线程池
*@authormingge
*
*/
@Configuration
@ComponentScan("com.foreveross.service.weixin.test.thread")
@EnableAsync
publicclassTaskExecutorConfigimplementsAsyncConfigurer{
@Override
publicExecutorgetAsyncExecutor(){
ThreadPoolTaskExecutortaskExecutor=newThreadPoolTaskExecutor();
taskExecutor.setCorePoolSize(5);
taskExecutor.setMaxPoolSize(20);
taskExecutor.setQueueCapacity(25);
taskExecutor.initialize();
returntaskExecutor;
}
@Override
publicAsyncUncaughtExceptionHandlergetAsyncUncaughtExceptionHandler(){
returnnull;
}
}
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:
packagecom.foreveross.service.weixin.test.thread;
importorg.springframework.scheduling.annotation.Async;
importorg.springframework.stereotype.Service;
/**
*线程池任务
*@authormingge
*
*/
@Service
publicclassTaskService{
@Async
publicvoidexecuteAsyncTask(inti){
System.out.println("执行异步任务:"+i);
}
@Async
publicvoidexecuteAsyncTask1(inti){
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.
packagecom.foreveross.service.weixin.test.thread;
importorg.springframework.context.annotation.AnnotationConfigApplicationContext;
/**
*
*@authormingge
*
*/
publicclassTest{
publicstaticvoidmain(String[]args){
AnnotationConfigApplicationContextcontext=newAnnotationConfigApplicationContext(TaskExecutorConfig.class);
TaskServicetaskService=context.getBean(TaskService.class);
for(inti=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
packagecom.foreveross.service.weixin.test.thread;
importorg.springframework.context.annotation.ComponentScan;
importorg.springframework.context.annotation.Configuration;
importorg.springframework.scheduling.annotation.EnableScheduling;
@Configuration
@ComponentScan("com.foreveross.service.weixin.test.thread")
@EnableScheduling//开启对定时器的支持
publicclassTaskSchedulerConfig{
}
packagecom.foreveross.service.weixin.test.thread;
importjava.util.Date;
importorg.springframework.scheduling.annotation.Scheduled;
importorg.springframework.stereotype.Service;
@Service
publicclassTimerTaskJob{
@Scheduled(fixedRate=2000)
publicvoidtest(){
System.out.println("我是定时任务:"+newDate().getSeconds());
}
}
packagecom.foreveross.service.weixin.test.thread;
importorg.springframework.context.annotation.AnnotationConfigApplicationContext;
publicclassTestTimer{
publicstaticvoidmain(String[]args){
AnnotationConfigApplicationContextcontext=newAnnotationConfigApplicationContext(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毛票票。