SpringBoot-@async异步执行方法

启动加上@EnableAsync ,需要执行异步方法上加入  @Async

在方法上加上@Async之后 底层使用多线程技术

演示代码：

@RestController
@Slf4j
public class IndexController {    @Autowired
    private UserService userService;    @RequestMapping("/index")
    public String index() {
        log.info("##01##");
        userService.userThread();
        log.info("##04##");
        return "success";
    }}@Service
@Slf4j
public class UserService {    @Async // 类似与开启线程执行..
    public void userThread() {
        log.info("##02##");
        try {
            Thread.sleep(5 * 1000);
        } catch (Exception e) {
            // TODO: handle exception
        }
        log.info("##03##");        // new Thread(new Runnable() {
        // public void run() {
        // log.info("##02##");
        // try {
        // Thread.sleep(5 * 1000);
        // } catch (Exception e) {
        // // TODO: handle exception
        // }
        // log.info("##03##");
        // }
        // }).start();
    }}@EnableAsync // 开启异步注解
@SpringBootApplication
public class App {    public static void main(String[] args) {
        SpringApplication.run(App.class, args);
    }}