hadoop 在HDFS文件系统內进行文件复制

代码如下

package hadoop_do;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FileUtil;
import org.apache.hadoop.fs.Path;
public class Cpfile {
	 public static void main(String[] args) throws IOException{
	      Path source=new Path("/hulei/on1.txt");//源文件
	      Path target=new Path("/wang/");//目标目录
	      Configuration conf = new Configuration();
	 	 conf.set("fs.defaultFS", "hdfs://hadoop1:8020");
	 	 System.setProperty("HADOOP_USER_NAME", "root");
	 	 FileSystem fs=FileSystem.get(conf);
	 	 FileUtil.copy(fs, source, fs, target,false,conf);
	    }
}