@GetMapping("/sleep")
	public String sleep() {
		try {
			Thread.sleep(1000L);
		}
		catch (InterruptedException e) {
			e.printStackTrace();
		}
		return "ok";
	}
Provide interfaces to consumers.

@author fangjian0423, MieAh
spring-cloud-alibaba-examples/nacos-example/nacos-discovery-example/nacos-discovery-provider-example/src/main/java/com/alibaba/cloud/examples/EchoController.java