签名算法说明

public static String sign(List<String> values, String ticket) { //values传ticket外的其他参数
    if (values == null) {
        throw new NullPointerException("values is null");
    }
    values.removeAll(Collections.singleton(null));// remove null
    values.add(ticket);
    java.util.Collections.sort(values);

    StringBuilder sb = new StringBuilder();
    for (String s : values) {
        sb.append(s);
    }
    return Hashing.sha1().hashString(sb, Charsets.UTF_8).toString().toUpperCase();
}

String accessToken = client.getAccessToken();//http 请求
String ticket = client.getTicket(accessToken);//http 请求
String sign = SignUtils.sign(data, ticket);