hdfs访问文件

import org.apache.hadoop.conf.Configuration;

import org.apache.hadoop.fs.FileSystem;

import org.apache.hadoop.fs.Path;

public class Chapter3 {

public static void main(String[] args) {

​ try {

​ String filename = “hdfs://localhost:9000/user/hadoop/test.txt”;

​ Configuration conf = new Configuration();

​ FileSystem fs = FileSystem.get(conf);

​ if(fs.exists(new Path(filename))){

​ System.out.println(“文件存在”);

​ }else{

​ System.out.println(“文件不存在”);

​ }

​ } catch (Exception e) {

​ e.printStackTrace();

​ }

}

}