一、通过字符流复制文件

import java.io.*;
public class Test {
public static void main(String args[]) throws IOException{
File f1 &＃61; new File("e:/java/code/");
f1.mkdirs();
File f2 &＃61; new File(f1,"aa.txt");
f2.createNewFile();
int n;
FileReader in &＃61; new FileReader("e:/java/code/aa.txt");
FileWriter ci &＃61; new FileWriter("e:/java/code/copy.txt");
while((n&＃61;in.read())!&＃61;-1)
{
ci.write(n);
System.out.print((char)n);
}
in.close();
ci.close();
}
}

二、通过字节流复制文件

import java.io.*;
public class Test1 {
public static void main(String args[]) throws IOException{
File f1 &＃61; new File("e:/a/b");
f1.mkdirs();
File f2 &＃61; new File(f1,"aa.jpg");
f2.createNewFile();
int n;
InputStream in &＃61; new FileInputStream("e:/java/code/aa.jpg");
OutputStream ci &＃61; new FileOutputStream("e:/java/code/copy.jpg");
while((n&＃61;in.read())!&＃61;-1)
{
ci.write(n);
}
in.close();
ci.close();
}
}