Hadoop

1.获取文件详细信息

   
    @Test
    public void fileDetail() throws IOException {
        //参数解读：参数1：路径；参数2：是否递归
        RemoteIterator listFiles = fs.listFiles(new Path("/"), true);

        //遍历文件
        while(listFiles.hasNext()){
            LocatedFileStatus fileStatus = listFiles.next();
            System.out.println("==========" + fileStatus.getPath() + "==========");
            System.out.println(fileStatus.getPermission());
            System.out.println(fileStatus.getOwner());
            System.out.println(fileStatus.getGroup());
            System.out.println(fileStatus.getLen());
            System.out.println(fileStatus.getModificationTime());
            System.out.println(fileStatus.getReplication());
            System.out.println(fileStatus.getBlockSize());
            System.out.println(fileStatus.getPath().getName());

            //获取块信息
            BlockLocation[] blockLocations = fileStatus.getBlockLocations();
            System.out.println(Arrays.toString(blockLocations));
        }
    }

2.判断是文件还是文件夹

    
    @Test
    public void testFile() throws IOException {
        FileStatus[] listStatus = fs.listStatus(new Path("/"));

        for(FileStatus status : listStatus){
            if(status.isFile()){
                System.out.println("文件：" + status.getPath().getName());
            }else{
                System.out.println("目录：" + status.getPath().getName());
            }
        }
    }