yml：檔案

建立一個spring 執行緒池配置類

@EnableAsync
@Configuration
public class ThreadPoolConfig {
    private static Logger logger = LoggerFactory.getLogger(ThreadPoolConfig.class);

    @Value("${threadpool.core-pool-size}")
    private int corePoolSize;

    @Value("${threadpool.max-pool-size}")
    private
 
 int maxPoolSize;

    @Value("${threadpool.queue-capacity}")
    private int queueCapacity;

    @Value("${threadpool.keep-alive-seconds}")
    private int keepAliveSeconds;


    @Bean(name = "asyncServiceExecutor")
    public Executor asyncServiceExecutor() {
        logger.info("start executor -->");
        ThreadPoolTaskExecutor executor 
 
= new ThreadPoolTaskExecutor();
        //設定核心執行緒數
        executor.setCorePoolSize(corePoolSize);
        //設定最大執行緒數
        executor.setMaxPoolSize(maxPoolSize);
        //設定佇列大小
        executor.setQueueCapacity(queueCapacity);
        //配置執行緒池的字首
        executor.setThreadNamePrefix("async-plan-service-");
        executor.setRejectedExecutionHandler(
 
new ThreadPoolExecutor.CallerRunsPolicy());
        //設定空閒時間
        executor.setKeepAliveSeconds(keepAliveSeconds);
        //進行載入
        executor.initialize();
        return executor;
    }
}