2021 10 9

java操作hdfs:

public static void peintinfo(FileSystem f,String hadooppath)
{

    try {
        Configuration conf = new Configuration();
        FileStatus fs = f.getFileStatus(new Path(hadooppath));
        System.out.println("path: "+fs.getPath());
        System.out.println("length: "+fs.getLen());
        System.out.println("modify time: "+fs.getModificationTime());
        System.out.println("owner: "+fs.getOwner());
        System.out.println("replication: "+fs.getReplication());
        System.out.println("blockSize: "+fs.getBlockSize());
        System.out.println("group: "+fs.getGroup());
        System.out.println("permission: "+fs.getPermission().toString());
    } catch (IOException e) {
        e.printStackTrace();
    }
}

public static void finddall(FileSystem fs,String hadooppath) throws Exception {
    FileStatus[] filelist = fs.listStatus(new Path(hadooppath));
    if(filelist.length==0) System.out.println("文件夹为空");
    else System.out.println("文件夹不为空");
    for (int i = 0; i < filelist.length; i++) {
        FileStatus fileStatus = filelist[i];
        System.out.println("_________________第" + (i+1) + "个文件"
                + "____________________");
        boolean result = fs.isDirectory(fileStatus.getPath());
        if(result)
        {
            System.out.println("进入文件夹："+fileStatus.getPath().getName());
            finddall(fs,fileStatus.getPath().toString());
        }else{
            System.out.println("Name:" + fileStatus.getPath().getName());
            System.out.println("size:" + fileStatus.getLen());
            System.out.println("输出文件信息：");
            peintinfo(fs,fileStatus.getPath().toString());
        }
    }
}