SpringBoot异步执行方法

SpringBoot中使用@Async注解标记的方法，会在调用方法的当前线程之外的独立线程中执行。

Spring使用@Async注解实现异步任务:

1. application类上加@EnableAsync注解:

@EnableAsync
public class TestApplication {
	public static void main(String[] args) {
		SpringApplication.run(TestApplication.class, args);
	}
}

2. application同级目录下添加配置类(也可不配，方法上直接加@Async注解即可):

package com.h3c.core;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * 异步任务线程池配置类
 *
 * @Description: 异步任务线程池配置类
 */
@Configuration
public class TaskPoolConfig {
	@Bean("testTaskExecutor")
	public Executor testTaskExecutor() {
		ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
		executor.setCorePoolSize(10);
		executor.setMaxPoolSize(20);
		executor.setQueueCapacity(200);
		executor.setKeepAliveSeconds(60);
		executor.setThreadNamePrefix("testTaskExecutor-");
		executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
		return executor;
	}
}

3. 需要异步的方法或类上添加@Async注解：

@Async("testTaskExecutor")
public void testAsync(){
    return;
}