如何获取目录中文件的绝对路径? [英] How to get absolute paths of files in a directory?
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问题描述
我有一个包含文件,目录,子目录等的目录。如何使用Apache Hadoop API获取所有文件和目录的绝对路径列表?
I have a directory with files, directories, subdirectories, etc. How I can get the list of absolute paths to all files and directories using the Apache Hadoop API?
推荐答案
使用HDFS API:
Using HDFS API :
package org.myorg.hdfsdemo;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
public class HdfsDemo {
public static void main(String[] args) throws IOException {
Configuration conf = new Configuration();
conf.addResource(new Path("/Users/miqbal1/hadoop-eco/hadoop-1.1.2/conf/core-site.xml"));
conf.addResource(new Path("/Users/miqbal1/hadoop-eco/hadoop-1.1.2/conf/hdfs-site.xml"));
FileSystem fs = FileSystem.get(conf);
System.out.println("Enter the directory name :");
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
Path path = new Path(br.readLine());
displayDirectoryContents(fs, path);
}
private static void displayDirectoryContents(FileSystem fs, Path rootDir) {
// TODO Auto-generated method stub
try {
FileStatus[] status = fs.listStatus(rootDir);
for (FileStatus file : status) {
if (file.isDir()) {
System.out.println("This is a directory:" + file.getPath());
displayDirectoryContents(fs, file.getPath());
} else {
System.out.println("This is a file:" + file.getPath());
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
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