字节流复制多级文件夹及其文件案例分享！ - 黑马程序员技术交流社区

<b><font size="3">package cn.itcast_02;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
public class CopyDirDemo {
public static void main(String[] args) throws IOException {
File srcFolder = new File("D:\\copy1");
File destFolder = new File("D:\\copy2");
copyDir(srcFolder, destFolder);
}
public static void copyDir(File srcFolder, File destFolder) throws IOException {
if (!destFolder.exists()) {
destFolder.mkdir();
}
File[] array = srcFolder.listFiles();
for (File file : array) {
if (file.isFile()) {
copyFile(new File(srcFolder, file.getName()), new File(destFolder, file.getName()));
} else {
copyDir(new File(srcFolder, file.getName()), new File(destFolder, file.getName()));
}
}
}
public static void copyFile(File srcFolder, File destFolder) throws IOException {
FileOutputStream fos = new FileOutputStream(destFolder);
FileInputStream fis = new FileInputStream(srcFolder);
byte[] bys = new byte[1024];
int len = 0;
while ((len = fis.read(bys)) != -1) {
fos.write(bys, 0, len);
}
fos.close();
fis.close();
}
}</font></b>

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