java api获取hdfs目录大小

1. hadoop fs -dus 的源码：

public static void dus(String src,Configuration conf) throws IOException {
	    Path srcPath = new Path(src);
	    FileSystem srcFs = srcPath.getFileSystem(conf);
	    FileStatus status[] = srcFs.globStatus(new Path(src));
	    if (status==null || status.length==0) {
	      throw new FileNotFoundException("Cannot access " + src + 
	          ": No such file or directory.");
	    }
	    for(int i=0; i<status.length; i++) {
	      long totalSize = srcFs.getContentSummary(status[i].getPath()).getLength();
	      String pathStr = status[i].getPath().toString();
	      System.out.println(("".equals(pathStr)?".":pathStr) + "\t" + totalSize);
	    }
	  }

2.

FileSystem fs = new Path(s).getFileSystem(conf);
System.out.println(fs.getContentSummary(new Path(s)).getLength());