Java 无法使用 Rest API 在容器之间进行通信

我有两个简单的端点:

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 = "{fromlogon}";
            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);
    }

    @GetMapping("/test")
    public String testt() {
        return "Accept-message-Page";
    }

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

}

我还有两个Docker文件:

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

它们之间唯一的区别是Jarfile名称--一个是Logon，另一个是AcceptMessage

因此，我使用以下命令运行我的应用程序:

docker network create my_network
docker build -t logon-page-app .
docker run -d -p 8080:8080 --network my_network --name logon-page-container logon-page-app
docker build -t accept-page-app .
docker run -d -p 8081:8080 --network my_network --name accept-page-container accept-page-app

虽然这款应用在控制台上运行并通过postman 发送请求时运行得很好，但每当我进入http://localhost:8080/send.时，我都无法让他们交换消息，因为我将其停靠在Docker上