Question

我有一个Spring Boot应用程序，并且想通过使用@async批注运行一个简单的Async后台任务，但是，这似乎不起作用（没有创建新线程，我等到每次调用后睡眠都结束了）功能 .. *****我的配置类：**

@Configuration
@EnableAsync
public class AsyncConfig {

}

****我的控制器：**

 @GetMapping(value = "/testAsync")
    @ResponseBody
    public String testAsync() {

        TestClass testClass = new TestClass();
        System.out.println("begin of test async dates is : " + new Date());

        for (int i = 0; i < 5; i++) {

            testClass.asyncMethod();
        }
        System.out.println("end of test async  dates is : " + new Date());

        return "end!";
    }

*****我的TestClass，其中的Async方法：**

@Service
public class TestClass {

    @Async
    public void asyncMethod() {
        System.out.println("Execute method asynchronously. in thread : "
                + Thread.currentThread().getName());

        try {
            Thread.sleep(10000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        System.out.println("after sleep : " + Thread.currentThread().getName());
    }
}

****运行应用程序后的输出：**

begin of test async dates is : Sat Jul 14 19:35:43 EET 2018
Execute method asynchronously. in thread : http-nio-8080-exec-1
after sleep : http-nio-8080-exec-1
Execute method asynchronously. in thread : http-nio-8080-exec-1
after sleep : http-nio-8080-exec-1
Execute method asynchronously. in thread : http-nio-8080-exec-1
after sleep : http-nio-8080-exec-1
Execute method asynchronously. in thread : http-nio-8080-exec-1
2018-07-14 19:36:22.299  INFO 3120 --- [MessageBroker-1] o.s.w.s.c.WebSocketMessageBrokerStats    : WebSocketSession[0 current WS(0)-HttpStream(0)-HttpPoll(0), 0 total, 0 closed abnormally (0 connect failure, 0 send limit, 0 transport error)], stompSubProtocol[processed CONNECT(0)-CONNECTED(0)-DISCONNECT(0)], stompBrokerRelay[null], inboundChannel[pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0], outboundChannelpool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0], sockJsScheduler[pool size = 1, active threads = 1, queued tasks = 0, completed tasks = 0]
after sleep : http-nio-8080-exec-1
Execute method asynchronously. in thread : http-nio-8080-exec-1
after sleep : http-nio-8080-exec-1
end of test async  dates is : Sat Jul 14 19:36:33 EET 2018

****注意：** -我尝试用@Component注释TestClass，但没有用 -我尝试在应用程序级别和方法级别上都添加一个执行程序，但是得到的结果相同。

请帮助我，我花了5个小时没有运气

Answer 1

将TestClass自动装配到控制器中，使控制器的实例成员具有TestClass类型，并为其添加注释Autowire。

当您自己实例化它时，Spring并不了解异步注释，并且对它的调用将在调用线程中运行。

@Async在春季不起作用

1 个答案: