public class SHAUtil {

    /***

     * SHA加密 生成40位SHA码

     * @param 待加密字符串

     * @return 返回40位SHA码

     */

    public static String shaEncode(String inStr) throws Exception {

        MessageDigest sha = null;

        try {

            sha = MessageDigest.getInstance("SHA1");

        } catch (Exception e) {

            System.out.println(e.toString());

            e.printStackTrace();

            return "";

        }

        byte[] byteArray = inStr.getBytes("UTF-8");

        byte[] md5Bytes = sha.digest(byteArray);

        StringBuffer hexValue = new StringBuffer();

        for (int i = ; i < md5Bytes.length; i++) {

            int val = ((int) md5Bytes[i]) & 0xff;

            if (val < ) {

                hexValue.append("");

            }

            hexValue.append(Integer.toHexString(val));

        }

        return hexValue.toString();

    }

    /**

     * 测试主函数

     * @param args

     * @throws Exception

     */

    public static void main(String args[]) throws Exception {

        String str = new String("sssfsfdsss");

        System.out.println("原始：" + str);

        System.out.println("SHA后：" + shaEncode(str));

    }

}