Hadoop学习--设置配置文件参数列出目录结构--day04

import java.io.ByteArrayOutputStream;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.InputStream;

import java.net.URL;

import org.apache.hadoop.conf.Configuration;

import org.apache.hadoop.fs.FSDataInputStream;

import org.apache.hadoop.fs.FSDataOutputStream;

import org.apache.hadoop.fs.FileStatus;

import org.apache.hadoop.fs.FileSystem;

import org.apache.hadoop.fs.FsUrlStreamHandlerFactory;

import org.apache.hadoop.fs.Path;

import org.apache.hadoop.io.IOUtils;

import org.junit.Test;

public class listfilestrcutor {

/**

* 列出文件目录结构

*/

@Test

public void listNum() throws Exception {

//创建configuration对象，有个默认的加载顺序，先从core-default.xml，再到src目录中的文件,这里

//我们给定了

Configuration conf = new Configuration();

//修改当前文件的副本数量

conf.set("dfs.replication", "4");

//修改当前文件的块大小

conf.set("dfs.blocksize", "20480");

FileSystem fs = FileSystem.get(conf);

//定义一个URL的字符串

String file = "hdfs://hadoop01:9000/user/hadoop";

//通过一个URL的字符串构建一个path对象

Path path = new Path(file);

FileStatus[] fst = fs.listStatus(path);

for(FileStatus fst0 : fst) {

System.out.println(fst0.getPath() + ": isFile() =" + fst0.isFile());

}

}

}