Spring Boot教程10——多线程

package com.wisely.highlight_spring4.ch3.taskexecutor;

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.wisely.highlight_spring4.ch3.taskexecutor")
@EnableAsync //开启异步任务支持 
public class TaskExecutorConfig implements AsyncConfigurer{//实现AsyncConfigurer接口

    @Override
    public Executor getAsyncExecutor() {//实现AsyncConfigurer接口并重写getAsyncExecutor方法，并返回一个ThreadPoolTaskExecutor，这样我们就获得了一个基于线程池TaskExecutor
         ThreadPoolTaskExecutor taskExecutor = new ThreadPoolTaskExecutor();
            taskExecutor.setCorePoolSize(5);
            taskExecutor.setMaxPoolSize(10);
            taskExecutor.setQueueCapacity(25);
            taskExecutor.initialize();
            return taskExecutor;
    }

    @Override
    public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
        return null;
    }

}

package com.wisely.highlight_spring4.ch3.taskexecutor;

import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;
@Service
public class AsyncTaskService {
    
    @Async //通过@Async注解表明该方法是一个异步方法，如果注解在类级别，则表明该类所有的方法都是异步方法，而这里的方法自动被注入使用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));
    }

}

package com.wisely.highlight_spring4.ch3.taskexecutor;

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();
    }
}