package com.xindao.ocr.swingui.swing.utils;
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import java.util.Arrays;
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import java.util.HashSet;
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import java.util.Set;
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public class FileNameValidator {
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// Windows系统不允许出现在文件名中的字符
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private static final Set<Character> ILLEGAL_CHARACTERS;
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// Windows系统保留的文件名
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private static final Set<String> RESERVED_NAMES;
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static {
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// 初始化非法字符集
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ILLEGAL_CHARACTERS = new HashSet<>(Arrays.asList(
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'/', '\'', '"', '\\', '*', ':', '?', '<', '>', '|'
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));
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// 初始化保留文件名称集合
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RESERVED_NAMES = new HashSet<>(Arrays.asList(
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"con", "prn", "aux", "nul",
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"com1", "com2", "com3", "com4", "com5", "com6", "com7", "com8", "com9",
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"lpt1", "lpt2", "lpt3", "lpt4", "lpt5", "lpt6", "lpt7", "lpt8", "lpt9"
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));
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}
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/**
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* 校验并清理文件名，使其符合Windows命名规则
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* @param fileName 原始文件名
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* @param replacement 用于替换非法字符的合法字符
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* @return 处理后的合法文件名
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*/
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public static String validateAndCleanFileName(String fileName, char replacement) {
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if (fileName == null || fileName.trim().isEmpty()) {
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return "unnamed";
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}
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// 移除首尾空格
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String cleaned = fileName.trim();
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// 替换非法字符
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StringBuilder sb = new StringBuilder();
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for (int i = 0; i < cleaned.length(); i++) {
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char c = cleaned.charAt(i);
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sb.append(ILLEGAL_CHARACTERS.contains(c) ? replacement : c);
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}
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cleaned = sb.toString();
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// 检查是否是保留文件名（不区分大小写）
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int dotIndex = cleaned.indexOf('.');
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String nameWithoutExtension = dotIndex != -1 ? cleaned.substring(0, dotIndex) : cleaned;
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if (RESERVED_NAMES.contains(nameWithoutExtension.toLowerCase())) {
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cleaned = replacement + cleaned;
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}
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// 处理只包含点或空格的情况
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if (cleaned.replaceAll("[./\\\\ ]", "").isEmpty()) {
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cleaned = "file" + replacement + cleaned;
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}
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// 处理以点结尾的情况
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while (cleaned.endsWith(".")) {
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cleaned = cleaned.substring(0, cleaned.length() - 1) + replacement;
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}
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// 限制文件名长度（Windows通常限制为255个字符）
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if (cleaned.length() > 255) {
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cleaned = cleaned.substring(0, 255);
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}
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return cleaned;
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}
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/**
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* 重载方法，使用下划线作为默认替换字符
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*/
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public static String validateAndCleanFileName(String fileName) {
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return validateAndCleanFileName(fileName, '_');
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}
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}
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