java编程如何实现从本地里读取文件1，写入到本地另一个文件2里（多种场景）

package zhouls.bigdata.DataFeatureSelection.util;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.MalformedURLException;

public class ReadLocalFile1WriteLocalFile2 {
/**
* 从本地文件1.txt读取数据写入本地文件2.txt
*
* @author zhouls
*
*/
public static void main(String[] args) throws IOException {
//输入流
InputStream in = new FileInputStream("F:/datamode/SnortFeatureSelectionData.txt");
//输出流
OutputStream out = new FileOutputStream("F:/datamode/SnortFeatureSelectionData2.txt", true);

try {
byte[] buffer = new byte[1024];
while (true) {
int byteRead = in.read(buffer);
if (byteRead == -1)
break;
out.write(buffer, 0, byteRead);
}
}

catch (MalformedURLException ex) {
System.err.println(args[0] + " is not a URL Java understands.");
} finally {
if (in != null)
in.close();
if (out != null) {
out.close();
}
}
}

}