hadoop客户端，文件重命名 、判断是文件还是文件夹 ---------》示例代码

重命名：

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.junit.Test;

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

public class HDFSClientTest {

    @Test
    public void rename() throws URISyntaxException, IOException, InterruptedException {
        Configuration conf = new Configuration();
        FileSystem fileSystem = FileSystem.get(new URI("hdfs://hadoop112:9000"), conf, "angel");

        //要修改名字的文件， 修改后的名称
        fileSystem.rename(new Path("/apache-maven-3.6.2-bin.tar.gz"),new Path("/maven-3.6.tar.gz"));

        fileSystem.close();
    }
}

结果： 

判断文件和文件夹： 

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.*;
import org.junit.Test;

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

public class HDFSClientTest {
    //判断是文件还是文件夹
    @Test
    public void isFileOrDir() throws URISyntaxException, IOException, InterruptedException {
        Configuration conf = new Configuration();
        FileSystem fileSystem = FileSystem.get(new URI("hdfs://hadoop112:9000"), conf, "angel");

        FileStatus[] listStatuses =fileSystem.listStatus(new Path("/"));
        for (FileStatus fs:listStatuses
             ) {
            if (fs.isFile()){
                System.out.println("是文件:"+fs.getPath().getName());
            }else {
                System.out.println("是目录:"+fs.getPath().getName());
            }
        }

        fileSystem.close();
    }

}

输出结果