給定HDFS中某一個目錄,輸出該目錄下的所有文件的讀寫權限、大小、創建時間、路徑等信息,如果該文件是目錄,則遞歸輸出該目錄下所有文件相關信息。

import java.text.SimpleDateFormat;
import org.apache.hadoop.fs.*;

public class E_RecursiveReadFile {
    public static void ReadFilesStatus(FileStatus fileinfo)
    {
        SimpleDateFormat format = new SimpleDateFormat(
                "yyyy-MM-dd HH:mm:ss");
        System.out.println("file path :"+fileinfo.getPath());
        System.out.println("file size :"+fileinfo.getLen()+"byte");
        System.out.println("file permission :"+fileinfo.getPermission());
        System.out.println("file create time :"+format.format(fileinfo.getModificationTime()));
        System.out.println("------------------------------------------------");
    }
    public static void main(String arg[])
    {
        try{
            Var_init var = new Var_init();
            String s_path = "/user";
            Path p_path = new Path(s_path);
            RemoteIterator<LocatedFileStatus> remoteIterator = var.fs.listFiles(p_path, true);
            System.out.println("------------------------------------------------");
            while(remoteIterator.hasNext())
            {
                var.fileinfo = remoteIterator.next();
                ReadFilesStatus(var.fileinfo);
            }
        }
        catch(Exception e){
            e.printStackTrace();
        }
    }
}

Var_init類參考 https://www.cnblogs.com/MiraculousB/p/13848744.html