Java 遍历文件夹 取出指定文件格式的文件

public static void find(String path, String reg) {Pattern pat = Pattern.compile(reg);File file = new File(path);File[] arr = file.listFiles();for (int i = 0; i < arr.length; i++) {if (arr[i].isDirectory()) {find(arr[i].getAbsolutePath(), reg);}Matcher mat = pat.matcher(arr[i].getAbsolutePath());if (mat.matches()) {                                System.out.println(arr[i].getAbsolutePath());}}}

public static void main(String[] args) {find("c:/文件夹", "\\S+\\.txt");}