微信开发--验证服务器的有效性签名工具类

签名工具类

public class SignUtil {    /**     * 验证签名     *     * @param signature     * @param timestamp     * @param nonce     * @return     */    public static boolean checkSignature(String signature, String timestamp, String nonce, String token) {        String[] arr = new String[]{token, timestamp, nonce};        // 将token、timestamp、nonce三个参数进行字典序排序        Arrays.sort(arr);        StringBuilder content = new StringBuilder();        for (int i = 0; i < arr.length; i++) {            content.append(arr[i]);        }        MessageDigest md = null;        String tmpStr = null;        try {            md = MessageDigest.getInstance("SHA-1");            // 将三个参数字符串拼接成一个字符串进行sha1加密            byte[] digest = md.digest(content.toString().getBytes());            tmpStr = byteToStr(digest);        } catch (NoSuchAlgorithmException e) {            e.printStackTrace();        }        content = null;        // 将sha1加密后的字符串可与signature对比，标识该请求来源于微信        return tmpStr != null ? tmpStr.equals(signature.toUpperCase()) : false;    }    /**     * 将字节数组转换为十六进制字符串     *     * @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;    }    /**     * 将字节转换为十六进制字符串     *     * @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;    }    //获取js签名    public static String getJsSign(String str) throws NoSuchAlgorithmException, UnsupportedEncodingException {        String signature = "";        try {            MessageDigest crypt = MessageDigest.getInstance("SHA-1");            crypt.reset();            crypt.update(str.getBytes("UTF-8"));            signature = byteToHex(crypt.digest());        } catch (NoSuchAlgorithmException e) {            LogUtils.logError("微信JS加密异常", e);        } catch (UnsupportedEncodingException e) {            LogUtils.logError("微信JS加密异常", e);        }        return signature;    }    private static String byteToHex(final byte[] hash) {        Formatter formatter = new Formatter();        for (byte b : hash) {            formatter.format("%02x", b);        }        String result = formatter.toString();        formatter.close();        return result;    }