import java.nio.charset.StandardCharsets;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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public class ChineseMD5Util {
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/**
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* 对汉字字符串进行MD5加密
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* @param input 要加密的汉字字符串
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* @return 32位小写MD5哈希值
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* @throws NoSuchAlgorithmException
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*/
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public static String md5Chinese(String input) throws NoSuchAlgorithmException {
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if (input == null) {
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return null;
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}
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// 统一使用UTF-8编码
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byte[] inputBytes = input.getBytes(StandardCharsets.UTF_8);
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MessageDigest md = MessageDigest.getInstance("MD5");
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byte[] digest = md.digest(inputBytes);
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// 将字节数组转换为16进制字符串
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StringBuilder sb = new StringBuilder();
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for (byte b : digest) {
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sb.append(String.format("%02x", b));
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}
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return sb.toString();
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}
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/**
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* 验证汉字字符串与MD5哈希是否匹配
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* @param input 要验证的汉字字符串
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* @param md5Hash 存储的MD5哈希值
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* @return 如果匹配返回true，否则false
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*/
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public static boolean verifyChinese(String input, String md5Hash) {
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try {
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String computedHash = md5Chinese(input);
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return computedHash.equals(md5Hash.toLowerCase());
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} catch (NoSuchAlgorithmException e) {
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// 理论上不会发生，因为MD5是Java标准库支持的
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return false;
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}
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}
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public static void main(String[] args) {
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try {
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String chineseText = "你好，世界！";
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// 加密
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String md5Hash = md5Chinese(chineseText);
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System.out.println("原文: " + chineseText);
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System.out.println("MD5哈希: " + md5Hash);
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// 验证
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boolean isValid = verifyChinese(chineseText, md5Hash);
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System.out.println("验证结果: " + (isValid ? "匹配" : "不匹配"));
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// 错误验证示例
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boolean isWrongValid = verifyChinese("你好，世界！", md5Hash);
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System.out.println("错误文本验证: " + (isWrongValid ? "匹配" : "不匹配"));
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} catch (NoSuchAlgorithmException e) {
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e.printStackTrace();
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}
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}
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}
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