SpringBoot定时器配置多线程

SpringBoot项目经常使用定时器去定时执行某些任务，但是当定时任务多时就需要考虑配置线程池，@Scheduled 默认单线程执行

配置线程池，通过实现 SchedulingConfigurer 类

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.TaskScheduler;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.SchedulingConfigurer;
import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
import org.springframework.scheduling.config.ScheduledTaskRegistrar;

import java.util.concurrent.ThreadPoolExecutor;

/**
 * 定时器线程池配置
 *
 * @author kou
 */
@Configuration
@EnableScheduling
public class ScheduleConfig implements SchedulingConfigurer {

    /**
     * 定时调度配置
     *
     * @return 线程池
     */
    @Bean
    public TaskScheduler taskScheduler() {
        ThreadPoolTaskScheduler executor = new ThreadPoolTaskScheduler();
        executor.setPoolSize(10);
        executor.setThreadNamePrefix("scheduler-thread");
        //设置饱和策略
        //CallerRunsPolicy：线程池的饱和策略之一，当线程池使用饱和后，直接使用调用者所在的线程来执行任务；如果执行程序已关闭，则会丢弃该任务
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        executor.initialize();
        return executor;
    }

    /**
     * 配置@Scheduled 定时器所使用的线程池
     *
     * @param scheduledTaskRegistrar
     */
    @Override
    public void configureTasks(ScheduledTaskRegistrar scheduledTaskRegistrar) {
        //可配置两种类型：TaskScheduler、ScheduledExecutorService
        //scheduledTaskRegistrar.setScheduler(taskScheduler());
        //只可配置一种类型：taskScheduler
        scheduledTaskRegistrar.setTaskScheduler(taskScheduler());
    }

}