Java File创建文件复制文件

import java.io.*;
public class Test12
{
public static void main(String[] args) throws IOException
{
String separator = File.separator;    //Windows系统与linux系统分割符不同。
String direcory = "dir1"+separator+"dir2";
String fileName = "test.txt";
File file = new File(direcory,fileName);
String path = null;
if(file.exists())
{
path = file.getAbsolutePath();
System.out.println(file.getAbsolutePath()+"\n"+file.length());
//file.delete();
}else
{
file.getParentFile().mkdirs();
try
{
file.createNewFile();
}
catch (IOException e)
{
e.printStackTrace();
}
}
FileReader fr = new FileReader("f:/ServerClient.java");
FileWriter fw = n
a391
ew FileWriter(path);
BufferedReader br = new BufferedReader(fr);
BufferedWriter bw = new BufferedWriter(fw);
char[] ch = new char[1024];
int length = br.read(ch);
while(length>0)
{
bw.write(ch,0,length);
length=br.read(ch);
}
bw.flush();
fr.close();
fw.close();
}
}