springboot 多線程使用

 實現  AsyncConfigurer 接口 ，並給類上加上註解  @Configuration  表示這是一個配置類，@EnableAsync 開啓異步

@Configuration
@EnableAsync
public class ThreadConfig implements AsyncConfigurer {

    @Override
    @Bean(name = "asyncTest")
    public Executor getAsyncExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(5);
        executor.setMaxPoolSize(15);
        executor.setQueueCapacity(25);
        executor.setBeanName("asyncTest");
        executor.initialize();
        return executor;
    }
    @Override
    public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
        return null;
    }
}

service 層

@Service
public class AsyncTaskService {
    @Async("asyncTest")
    public void executeAsyncTask(int i) {
        System.out.println("線程" + Thread.currentThread().getName() + " 執行異步任務：" + i);
    }
}

還需要在啓動類上添加註解  @EnableAsync

@MapperScan("com.hanxs.mapper")
@EnableCaching
@SpringBootApplication
@EnableAsync
public class SpringBoot01CacheApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringBoot01CacheApplication.class, args);
    }

}

測試

@RunWith(SpringRunner.class)
@SpringBootTest
public class AsyncTaskServiceTest {

    @Autowired
    public AsyncTaskService asyncTaskService;

    @Test
    public void executeAsyncTask() {
        for (int i = 0; i < 20; i++) {
            asyncTaskService.executeAsyncTask(i);
        }
    }

}

輸出