SpringBoot2线程池定义使用方法解析

 @Slf4j @EnableAsync @Configuration public class AsyncExecutorConfig implements AsyncConfigurer { @Bean public ThreadPoolTaskExecutor asyncServiceExecutor() { //返回可用处理器的虚拟机的最大数量不小于1 int cpu = Runtime.getRuntime().availableProcessors(); log.info("start asyncServiceExecutor cpu : {}", cpu); ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor(); //配置核心线程数 executor.setCorePoolSize(cpu); //配置最大线程数 executor.setMaxPoolSize(cpu); //配置队列大小 executor.setQueueCapacity(50); //用来设置线程池关闭的时候等待所有任务都完成再继续销毁其他的Bean executor.setWaitForTasksToCompleteOnShutdown(true); //设置线程池中任务的等待时间，如果超过这个时候还没有销毁就强制销毁，以确保应用最后能够被关闭，而不是阻塞住 executor.setAwaitTerminationSeconds(60); //配置线程池中的线程的名称前缀 executor.setThreadNamePrefix("async-service-"); // rejection-policy：当pool已经达到max size的时候，如何处理新任务 // CALLER_RUNS：不在新线程中执行任务，而是有调用者所在的线程来执行 // 使用预定义的异常处理类 executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy()); //执行初始化 executor.initialize(); return executor; } @Override public Executor getAsyncExecutor() { return asyncServiceExecutor(); } @Override public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() { return (throwable, method, objects) -> { StringBuilder sb = new StringBuilder(); for (Object param : objects) { sb.append(param).append(","); } log.error("Exception message - {}，Method name - {}，Parameter value - {}", throwable.getMessage(), method.getName(), sb.toString()); }; } }

 @Autowired private ThreadPoolTaskExecutor threadPoolTaskExecutor; public void test(){ CompletableFuture userFuture = CompletableFuture.runAsync(() -> System.out.println(111), threadPoolTaskExecutor); }