java问题求帮忙

java问题求帮忙

final static void showAllFiles(File dir) throws Exception {
File[] fs = dir.listFiles();
for (int i = 0; i < fs.length; i++) {
System.out.println(fs[i].getAbsolutePath());
if (fs[i].isDirectory()) {
try {
showAllFiles(fs[i]);
} catch (Exception e) {
}
}
}
}

private void copyFolder(File src, File dest) throws IOException {
if (src.isDirectory()) {
if (!dest.exists()) {
dest.mkdir();
}
String files[] = src.list();
for (String file : files) {
File srcFile = new File(src, file);
File destFile = new File(dest, file);
// 递归复制
copyFolder(srcFile, destFile);
}
} else {
InputStream in = new FileInputStream(src);
OutputStream out = new FileOutputStream(dest);

byte[] buffer = new byte[1024];

int length;

while ((length = in.read(buffer)) > 0) {
out.write(buffer, 0, length);
}
in.close();
out.close();
}
}
第一个:打印
第二个:拷贝
使用：
File root = new File("E:\\fileName");
showAllFiles(root);//第二个同第一个差不多用法
记得抛出异常（或用try catch）