Spring boot 定时任务

定时任务执行方法

@Configuration      //1.主要用于标记配置类，兼备Component的效果。
@EnableScheduling   // 2.开启定时任务
@Slf4j
public class  SyncTask{
    @Scheduled(cron = "0/5 * * * * ?")
    public void dataSyncTask() {
        log.info("Second scheduled task is starting... ...");
        log.info("Second scheduled task is ending... ...");
    }
}

这里发布后会遇到单线程不执行的问题
添加Config

import org.springframework.boot.autoconfigure.batch.BatchProperties;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.scheduling.annotation.SchedulingConfigurer;
import org.springframework.scheduling.config.ScheduledTaskRegistrar;

import java.lang.reflect.Method;
import java.util.concurrent.Executors;

/**
 * @Auther: Wangtianming
 * @Date: 2021/10/9 18:19
 * @Description:
 */
@EnableScheduling
@Configuration
public class ScheduleConfig implements SchedulingConfigurer {

    // 将定时任务的单线程改成多线程
    @Override
    public void configureTasks(ScheduledTaskRegistrar scheduledTaskRegistrar) {
        Method[] methods = BatchProperties.Job.class.getMethods();
        int defaultPoolSize = 3;
        int corePoolSize = 0;
        if (methods != null && methods.length > 0) {
            for (Method method : methods) {
                Scheduled annotation = method.getAnnotation(Scheduled.class);
                if (annotation != null) {
                    corePoolSize++;
                }
            }
            if (defaultPoolSize > corePoolSize)
                corePoolSize = defaultPoolSize;
        }
        scheduledTaskRegistrar.setScheduler(Executors.newScheduledThreadPool(corePoolSize));
    }
}