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                ~~~ /** * 請求校驗工具類 * */ public class SignUtil { // 與開發模式接口配置信息中的Token保持一致 private static String token = "weixinCourse"; /** * 校驗簽名 * * @param signature 微信加密簽名 * @param timestamp 時間戳 * @param nonce 隨機數 * @return */ public static boolean checkSignature(String signature, String timestamp, String nonce) { // 對token、timestamp和nonce按字典排序 String[] paramArr = new String[] { token, timestamp, nonce }; Arrays.sort(paramArr); // 將排序后的結果拼接成一個字符串 String content = paramArr[0].concat(paramArr[1]).concat(paramArr[2]); String ciphertext = null; try { MessageDigest md = MessageDigest.getInstance("SHA-1"); // 對接后的字符串進行sha1加密 byte[] digest = md.digest(content.toString().getBytes()); ciphertext = byteToStr(digest); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } // 將sha1加密后的字符串與signature進行對比 return ciphertext != null ? ciphertext.equals(signature.toUpperCase()) : false; } /** * 將字節數組轉換為十六進制字符串 * * @param byteArray * @return */ private static String byteToStr(byte[] byteArray) { String strDigest = ""; for (int i = 0; i < byteArray.length; i++) { strDigest += byteToHexStr(byteArray[i]); } return strDigest; } /** * 將字節轉換為十六進制字符串 * * @param mByte * @return */ private static String byteToHexStr(byte mByte) { char[] Digit = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' }; char[] tempArr = new char[2]; tempArr[0] = Digit[(mByte >>> 4) & 0X0F]; tempArr[1] = Digit[mByte & 0X0F]; String s = new String(tempArr); return s; } } ~~~
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