hadoop 配置问题以及HDFS下如何读写文件

package com;
import java.io.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;

public class NanShou {

	public static void main(String[] args) throws IOException {
		//HDFS连接
		Configuration conf=new Configuration();
		FileSystem fs = FileSystem.get(conf);
		//要求1
		fs.mkdirs(new Path("/usr/local/hadoop/H"));//建立文件夹
		Path inFile1 =new Path("/usr/local/hadoop/H/hdfstest1.txt");//创建文本hdfstest1.txt
		FSDataOutputStream outputStream1=fs.create(inFile1);
		outputStream1.writeUTF("信1605-1  20163678 HDFS课堂测试");//输入
		outputStream1.flush();
	   outputStream1.close();
	    //要求2
		Path inFile2=new Path("/usr/local/hadoop/l/hdfstest2.txt");//创建文本hdfstest2.txt
		FSDataOutputStream outputStream2=fs.create(inFile2);
		FSDataInputStream inputStream1=fs.open(inFile1);//打开hdfstest1.txt
		outputStream2.writeUTF(inputStream1.readUTF());//读取hdfstest1.txt内容并写入hdfstest2.txt
		outputStream2.flush();
	   outputStream2.close();
	   inputStream1.close();
	    //要求3
		FSDataInputStream inputStream2=fs.open(inFile2);//打开hdfstest2.txt
      System.out.println(inputStream2.readUTF());//输出//打开hdfstest2.txt内容
      inputStream2.close();
	}
	
}