1.实现目录创建操作(程序代码) 2.实现文件上传操作(程序代码) 3.实现文件列表查看(程序代码) 4.实现目录删除操作(程序代码) hadoop

在Hadoop框架中，以下是使用Java API实现一些基本文件系统操作的简单示例，这里假设我们已经有一个Hadoop配置环境：

1. **实现目录创建操作**:

import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.conf.Configuration;

public void createDirectory(String path) throws IOException {
    Configuration conf = new Configuration();
    FileSystem fs = FileSystem.get(conf);
    fs.mkdirs(new Path(path));
    System.out.println("Directory created at " + path);
}

2. **实现文件上传操作**:

public void uploadFile(String srcPath, String dstPath) throws IOException {
    Configuration conf = new Configuration();
    FileSystem fs = FileSystem.get(conf);
    fs.copyFromLocalFile(new Path(srcPath), new Path(dstPath));
    System.out.println("File uploaded from " + srcPath + " to " + dstPath);
}

3. **实现文件列表查看**:

public void listFiles(String directoryPath) throws IOException {
    Configuration conf = new Configuration();
    FileSystem fs = FileSystem.get(conf);
    FileStatus[] fileStatuses = fs.listStatus(new Path(directoryPath));
    if (fileStatuses != null) {
        for (FileStatus status : fileStatuses) {
            System.out.println(status.getPath().getName());
        }
    } else {
        System.out.println("Directory is empty or not found.");
    }
}

4. **实现目录删除操作**:

public void deleteDirectory(String path) throws IOException {
    Configuration conf = new Configuration();
    FileSystem fs = FileSystem.get(conf);
    boolean result = fs.delete(new Path(path), true); // Recursive deletion with true parameter
    if (result) {
        System.out.println("Directory deleted at " + path);
    } else {
        System.out.println("Failed to delete directory or does not exist.");
    }
}

注意：这只是一个基础的示例，实际应用中可能需要处理异常并确保用户有相应的权限。同时，在Hadoop分布式环境下，文件操作通常会在HDFS上进行，而不仅仅是本地文件系统。