Spring Boot 线程池实现的关键代码

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启动类申明@EnableAsync

@SpringBootApplication
@EnableAsync
public classApplication {
    public static void main(String[] args){
        SpringApplication.run(Application.class);
    }
}

实现AsyncConfigurer

@Configuration
@ComponentScan("...")
public class AsyncConfiguration implements AsyncConfigurer {

    @Override
    public Executor getAsyncExecutor() {
        org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor tp = new ThreadPoolTaskExecutor();
        tp.setCorePoolSize(5);
        tp.setMaxPoolSize(10);
        //线程空闲超过这个时间，就回收该线程↓
        tp.setKeepAliveSeconds(3000);
        //队列长度↓
        tp.setQueueCapacity(1000);
        tp.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        tp.initialize();
        return tp;
    }

    @Override
    public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
        //异常处理↓
        return null;
    }
}

方法上申明 @Async

@Component
public class AsyncTest {

    @Async
    public void testVoid(String s) {
      //无返回值
    }

    @Async
    public Future<String> testFuture(String S){
       //有返回值
       return new AsyncResult<String> (s);
    }
}

使用方法

@Controller
@RequestMapping("/")
public class TestControllers {

    //在需要的地方注入↓
    @Autowired
    private AsyncTest asyncTest;

    @GetMapping
    public ModelAndView index(){
        asyncTest.testVoid("...");
        asyncTest.testFuture("...");
        return new ModelAndView("index", "...", "...");
    }
}