SpringBoot自定義線程池執行異步任務1

第一步註冊線程池

    @Bean("taskExecutor")
    public Executor taskExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(10);
        executor.setMaxPoolSize(20);
        executor.setQueueCapacity(200);
        executor.setKeepAliveSeconds(60);
        executor.setThreadNamePrefix("taskExecutor-");
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        return executor;
    }
第二步 開啓異步 @EnableAsync

@EnableAsync
@SpringBootApplication
@MapperScan("com.****.fusionlabel.mapper")
public class FusionLabelApplication {
 
    public static void main(String[] args) {
        SpringApplication.run(FusionLabelApplication.class, args);
    }
}
@第三步使用 在你要使用的service層的方法上加上@Async("taskExecutor") 指明你所使用的線程池

    @Async("taskExecutor")
    public void updateLibary(List<Remark> remarks){
        remarks.stream().filter(remark -> StringUtils.isNotEmpty(remark.getRevMark())).forEach( remark -> libraryMapper.updateById(remark));
    }
當你想要返回結果時你可以返回一個Future對象

    @Async("taskExecutor")
    public Future<String> doFuture(int i){
        Future<String> future = null;
        future = new AsyncResult<String>("success:" + i);
        return  future;
    }