我有两个java文件server.java和client.java。两者都在不同的容器中。
docker文件：我用于服务器的dockerfile（在名为“server”的文件夹中）是：

FROM java:8
COPY Server.java /
RUN javac Server.java
EXPOSE 25000
ENTRYPOINT ["java"]
CMD ["Server"]

客户端的dockerfile（在名为“client”的文件夹中）是：

FROM java:8
COPY Client.java /
RUN javac Client.java
EXPOSE 25000
ENTRYPOINT ["java"]
CMD ["Client"]

来建造我用的围城

docker build . (for the client Dockerfile)

docker build . (for the server Dockerfile)

对于我使用的网络设置

docker network create client_server_network

docker run --network-alias server --network client_server_network -it serverimage

docker run --network client_server_network -it clientimage

我运行客户端映像时遇到的错误是

java.net.ConnectException: Connection refused (Connection refused)

客户端.java

import java.io.*;
import java.net.*;

public class Client {
    public static void main(String[] args) {
        try {
            Socket s = new Socket("192.168.2.5", 25000);
            DataOutputStream dout = new DataOutputStream(s.getOutputStream());
            dout.writeUTF("Hello Server");
            dout.flush();
            dout.close();
            s.close();
        } catch (Exception e) {
            System.out.println(e);
        }
    }
}

服务器.java

import java.io.*;
import java.net.*;

public class Server {
    public static void main(String[] args) {
        try {
            ServerSocket ss = new ServerSocket(25000);
            Socket s = ss.accept();// establishes connection
            DataInputStream dis = new DataInputStream(s.getInputStream());
            String str = (String) dis.readUTF();
            System.out.println("message= " + str);
            ss.close();
        } catch (Exception e) {
            System.out.println(e);
        }
    }
}

我做错了什么？