package zq;

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;

public class Write {
    public static void main(String[] args) throws IOException {
        Configuration conf=new Configuration();
 

        conf.set("fs.default.name", "hdfs://localhost:9000");
        Path inFile =new Path("/user/hadoop/hadoopfile/t1");
        FileSystem hdfs=FileSystem.get(conf);
        FSDataOutputStream outputStream=hdfs.create(inFile);
        outputStream.writeUTF("china cstor cstor china");
        outputStream.flush
 
();
        outputStream.close();
}
}

輸出HDFS裡剛寫入檔案的內容：

package output;

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 Read {
    public static void main(String[] args) throws IOException {
        Configuration conf=new Configuration();
        conf.set("fs.default.name", "hdfs://localhost:9000");
        Path inFile =new Path("/user/hadoop/hadoopfile/t1");
        FileSystem hdfs=FileSystem.get(conf);
        FSDataInputStream inputStream=hdfs.open(inFile);
        System.out.println("myfile:"+inputStream.readUTF());
        inputStream.close();
    }
}