异步实现的几种方式

//@Async配置，第一终实现方式，创建一个bean：

@Configuration
@EnableAsync //必要
public class ThreadTaskConfigration {
    @Bean
    public ThreadPoolTaskExecutor threadPoolTaskExecutor(){
        ThreadPoolTaskExecutor taskExecutor=new ThreadPoolTaskExecutor();
        //核心线程
        taskExecutor.setCorePoolSize(5);
        //最大线程数
        taskExecutor.setMaxPoolSize(50);
        //队列最大长度 >=mainExecutor.maxSize
        taskExecutor.setQueueCapacity(1000);
        //线程池维护线程所允许的空闲时间
        taskExecutor.setKeepAliveSeconds(60*5);
        //线程池对拒绝任务(无线程可用)的处理策略
        taskExecutor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        taskExecutor.setWaitForTasksToCompleteOnShutdown(true);
        return taskExecutor;
    }
}

@Async的第二种实现方式，继承方法。后期补上