Hadoop 版本 2.7.0

package com.feng.test.hdfs.filesystem;

import java.io.IOException;
import java.net.URI;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.permission.FsAction;
import org.apache.hadoop.fs.permission.FsPermission;

/**
 * 建立目錄並設定許可權
 * 遠端呼叫機器 需要 liunx 修改 /etc/hosts 新增 10.11.12.4 master
 * @author
 
 feng
 *
 */
public class CreateDir {

    public static void main(String[] args) {
        FileSystem hdfs = null;
        try{
            Configuration config = new Configuration();
            // 程式配置
            config.set("fs.default.name", "hdfs://master:9000");

            hdfs = FileSystem.get(new
 
 URI("hdfs://master:9000"),
                    config, "feng");
            Path path = new Path("/feng/tmp/"+System.currentTimeMillis());
            if(hdfs.exists(path)){
                System.out.println("There is already exist " + path);
            }else{
                FsPermission filePermission = null
 
;
                filePermission = new FsPermission(
                        FsAction.ALL, //user action
                        FsAction.ALL, //group action
                        FsAction.READ);//other action
                //建立目錄 不設定許可權,預設為當前hdfs伺服器啟動使用者
                //boolean success = hdfs.mkdirs(path, null);

                boolean success = hdfs.mkdirs(path, filePermission);
                System.out.println(path + " is success " + success);
            }

        }catch(Exception e){
            e.printStackTrace();
        }finally{
            if(hdfs != null){
                try {
                    hdfs.closeAll();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
    }

}