无法使用 Java Spring Boot 通过 Rest API 在两个 Docker 容器之间进行通信

我有两个Java Spring Boot应用程序: 在端口8080上:

@SpringBootApplication
@RestController
public class LogonPageApplication {
    private static final String PROCESS_STRING_URL = "http://localhost:8081/processString";

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

    @GetMapping("/send")
    public String test() {

        String responseBody = "";
        try {
            RestTemplate restTemplate = new RestTemplate();

            HttpHeaders headers = new HttpHeaders();
            headers.setContentType(MediaType.APPLICATION_JSON);

            String requestBody = "{testttgfvrdf}";
            HttpEntity<String> httpEntity = new HttpEntity<>(requestBody, headers);

            ResponseEntity<String> response = restTemplate.exchange(PROCESS_STRING_URL, HttpMethod.POST, httpEntity, String.class);

            responseBody = response.getBody();
        } catch (Exception e) {
            return e.getMessage();
        }

        return "Main Page\n" + "Response from /processString: " + responseBody;
    }

}

在端口8081上:

@SpringBootApplication
@RestController
public class AcceptMessageApplication {

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

    @PostMapping("/processString")
    public String processString(@RequestBody String inputString) {
        return "Processed string: " + inputString;
    }

}

我有两个Docker文件:

FROM openjdk:17-jdk-slim
WORKDIR /app
COPY target/AcceptMessage-0.0.1-SNAPSHOT.jar /app/AcceptMessage-0.0.1-SNAPSHOT.jar
EXPOSE 8080
CMD ["java", "-jar", "AcceptMessage-0.0.1-SNAPSHOT.jar"]

唯一不同的是文件名

和一个由docker组成的文件:

version: '3'
services:
  appacc:
    build:
      context: AcceptMessage
      dockerfile: Dockerfile
    ports:
      - "8081:8080"
    networks:
      - my-network
  applog:
    build:
      context: LogonPage
      dockerfile: Dockerfile
    ports:
      - "8080:8080"
    networks:
      - my-network
networks:
  my-network:

# docker-compose build
# docker-compose up

当我从控制台运行这个应用程序时，它可以正常工作，当我通过postman 发送请求时，端点也可以工作，但是我无法让他们交换消息，因为每当我进入http://localhost:8080/send时，它都会停靠，从而导致:

I/O error on POST request for "http://localhost:8081/processString": Connection refused.个