如何在运行于本地主机上两个spring boot应用程序上调用端点

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

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

@RestController
class HomeController {
    private final RestTemplate restTemplate;

    public HomeController(RestTemplate restTemplate) {
        this.restTemplate = restTemplate;
    }

    @GetMapping("/")
    public String callEndpointInAppB() {
        String url = "http://localhost:8081/endpoint-in-app-b";
        String response = restTemplate.getForObject(url, String.class);
        return "Response from App B: " + response;
    }
}

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

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

@RestController
class EndpointController {
    @GetMapping("/endpoint-in-app-b")
    public String endpointInAppB() {
        return "Hello from App B";
    }
}