使用Java从Docker容器读取本地文件系统

<dependency>
    <groupId>com.github.docker-java</groupId>
    <artifactId>docker-java</artifactId>
    <version>3.2.5</version>
</dependency>

import com.github.dockerjava.api.DockerClient;
import com.github.dockerjava.api.command.CopyArchiveFromContainerCmd;
import com.github.dockerjava.api.model.Frame;
import com.github.dockerjava.core.DefaultDockerClientConfig;
import com.github.dockerjava.core.DockerClientBuilder;
import com.github.dockerjava.core.command.CopyArchiveFromContainerResultCallback;

import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

public class DockerFileReader {

    public static void main(String[] args) {
        String containerId = "your-container-id";
        String sourcePath = "path/to/file/in/container";
        String destinationPath = "path/to/save/file/on/host";

        DefaultDockerClientConfig config = DefaultDockerClientConfig.createDefaultConfigBuilder().build();
        DockerClient dockerClient = DockerClientBuilder.getInstance(config).build();

        try {
            Path destination = Paths.get(destinationPath);
            Files.createDirectories(destination);

            CopyArchiveFromContainerCmd cmd = dockerClient.copyArchiveFromContainerCmd(containerId, sourcePath);
            cmd.exec(new CopyArchiveFromContainerResultCallback() {
                @Override
                public void onNext(Frame item) {
                    try (FileOutputStream fos = new FileOutputStream(destination.resolve(sourcePath).toFile())) {
                        fos.write(item.getPayload());
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }).awaitCompletion();

            System.out.println("File copied successfully from Docker container to local file system.");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}