通常来说，FileChannel比普通的缓冲输入输出流有更高的效率
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.channels.FileChannel;
public class fileChannelCopy {
public static void copy(File s, File d) {
FileInputStream fi = null;
FileOutputStream fo = null;
FileChannel in = null;
FileChannel out = null;
try {
fi = new FileInputStream(s);
fo = new FileOutputStream(d);
in = fi.getChannel();//得到对应的文件通道
out = fo.getChannel();//得到对应的文件通道
in.transferTo(0, in.size(), out);//连接两个通道，并且从in通道读取，然后写入out通道
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
fi.close();
in.close();
fo.close();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
public static void main(String[] args) {
File s = new File("e:\\java.zip");
File d = new File("d:\\java.zip");
new fileChannelCopy().copy(s,d);
System.out.println("复制完成");
}
}