Java代码操作HDFS(在/user/root/下面創建目錄)

1.创建HDFS目录并打成jar包

package Hdfs;

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;
/**
 * 创建HDFS目录
 * @author SimonsZhao
 *
 */
public class CreateDir {
    public static void main(String[] args) {
        String uri = "hdfs://neusoft-master:9000/user/root/test1";
        Configuration conf = new Configuration();
        try {
            FileSystem fs = FileSystem.get(URI.create(uri),conf);
            Path dfs = new Path("hdfs://neusoft-master:9000/user/root/test1");
            fs.mkdirs(dfs);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

2.执行主文件

[root@neusoft-master hadoop]# hadoop jar /usr/local/software/JarCreateDir.jar

3.查看HDFS中是否存在创建的test1文件

[root@neusoft-master hadoop]# hadoop dfs -ls /user/root/