| | |
| | | import java.nio.charset.StandardCharsets; |
| | | import java.security.MessageDigest; |
| | | import java.security.NoSuchAlgorithmException; |
| | | import java.util.ArrayList; |
| | | import java.util.List; |
| | | |
| | | public class ChineseMD5Util { |
| | | |
| | | /** |
| | | * 对汉字字符串进行MD5加密 |
| | | * @param input 要加密的汉字字符串 |
| | | * @return 32位小写MD5哈希值 |
| | | * @throws NoSuchAlgorithmException |
| | | */ |
| | | public static String md5Chinese(String input) throws NoSuchAlgorithmException { |
| | | if (input == null) { |
| | | return null; |
| | | public static List<Integer> getSelectedIndices(int[] arr) { |
| | | List<Integer> indices = new ArrayList<>(); |
| | | int index = 0; |
| | | int step = 3; |
| | | while (index < arr.length) { |
| | | indices.add(index); |
| | | index += step; |
| | | step = (step == 3) ? 1 : 3; |
| | | } |
| | | |
| | | // 统一使用UTF-8编码 |
| | | byte[] inputBytes = input.getBytes(StandardCharsets.UTF_8); |
| | | |
| | | MessageDigest md = MessageDigest.getInstance("MD5"); |
| | | byte[] digest = md.digest(inputBytes); |
| | | |
| | | // 将字节数组转换为16进制字符串 |
| | | StringBuilder sb = new StringBuilder(); |
| | | for (byte b : digest) { |
| | | sb.append(String.format("%02x", b)); |
| | | } |
| | | |
| | | return sb.toString(); |
| | | return indices; |
| | | } |
| | | |
| | | /** |
| | | * 验证汉字字符串与MD5哈希是否匹配 |
| | | * @param input 要验证的汉字字符串 |
| | | * @param md5Hash 存储的MD5哈希值 |
| | | * @return 如果匹配返回true,否则false |
| | | */ |
| | | public static boolean verifyChinese(String input, String md5Hash) { |
| | | try { |
| | | String computedHash = md5Chinese(input); |
| | | return computedHash.equals(md5Hash.toLowerCase()); |
| | | } catch (NoSuchAlgorithmException e) { |
| | | // 理论上不会发生,因为MD5是Java标准库支持的 |
| | | return false; |
| | | public static Integer getNextSelectedValue(int[] arr, int inputIndex) { |
| | | List<Integer> selectedIndices = getSelectedIndices(arr); |
| | | int currentPos = selectedIndices.indexOf(inputIndex); |
| | | if (currentPos != -1 && currentPos + 1 < selectedIndices.size()) { |
| | | return arr[selectedIndices.get(currentPos + 1)]; |
| | | } |
| | | return null; // 或按需处理 |
| | | } |
| | | |
| | | public static void main(String[] args) { |
| | | try { |
| | | String chineseText = "你好,世界!"; |
| | | int[] arr = {2, 5, 8, 10, 15, 20, 25, 30, 35, 40, 45, 50, 15, 40, 32, 48}; |
| | | System.out.println("输入 0,输出: " + getNextSelectedValue(arr, 0)); // 10 |
| | | System.out.println("输入 3,输出: " + getNextSelectedValue(arr, 3)); // 15 |
| | | System.out.println("输入 4,输出: " + getNextSelectedValue(arr, 4)); // 30 |
| | | System.out.println("输入 4,输出: " + getNextSelectedValue(arr, 5)); // 30 |
| | | |
| | | // 加密 |
| | | String md5Hash = md5Chinese(chineseText); |
| | | System.out.println("原文: " + chineseText); |
| | | System.out.println("MD5哈希: " + md5Hash); |
| | | |
| | | // 验证 |
| | | boolean isValid = verifyChinese(chineseText, md5Hash); |
| | | System.out.println("验证结果: " + (isValid ? "匹配" : "不匹配")); |
| | | |
| | | // 错误验证示例 |
| | | boolean isWrongValid = verifyChinese("你好,世界!", md5Hash); |
| | | System.out.println("错误文本验证: " + (isWrongValid ? "匹配" : "不匹配")); |
| | | |
| | | } catch (NoSuchAlgorithmException e) { |
| | | e.printStackTrace(); |
| | | } |
| | | } |
| | | } |