直接上代码:
一:配置类
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;
@Configuration
@ComponentScan("com.flysun.taskexecutor")
@EnableAsync //1 利用@EnableAync注解开启异步任务支持
public class TaskExecutorConfig implements AsyncConfigurer{//2
@Override
public Executor getAsyncExecutor() {//2复写方法,获得一个基于线程池的TaskExecutor
ThreadPoolTaskExecutor taskExecutor = new ThreadPoolTaskExecutor();
taskExecutor.setCorePoolSize(5);
taskExecutor.setMaxPoolSize(10);
taskExecutor.setQueueCapacity(25);
taskExecutor.initialize();
return taskExecutor;
}
@Override
public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
return null;
}
}
二:异步任务执行类
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;
@Service
public class AsyncTaskService {
@Async //声明为异步方法,如果注解在类上,则表明类中所有方法都是异步的
//添加了@Async的方法自动被注入使用前面复写的方法中ThreadPoolTaskExecutor作为TaskExecutor
public void executeAsyncTask(Integer i){
System.out.println("执行异步任务: "+i);
}
@Async
public void executeAsyncTaskPlus(Integer i){
System.out.println("执行异步任务+1: "+(i+1));
}
}
三:运行
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
public class Main {
public static void main(String[] args) {
AnnotationConfigApplicationContext context =
new AnnotationConfigApplicationContext(TaskExecutorConfig.class);
AsyncTaskService asyncTaskService = context.getBean(AsyncTaskService.class);
for(int i =0 ;i<10;i++){
asyncTaskService.executeAsyncTask(i);
asyncTaskService.executeAsyncTaskPlus(i);
}
context.close();
}
}
执行结果如下,可见两个方法的执行确实是异步的: