添加token参数校验方法及示例

src/main/java/com/qmai/openapi/sign/util/QmaiTokenUtil.java

@@ -46,7 +46,7 @@ public class QmaiTokenUtil {
      * @return 正常情况返回token字符串，token获取失败时返回null
      */
     public static String getToken(String grandCode, String openId, String openKey, Long nonce, Long timestamp) {
-        if (checkParam(grandCode, openId, openKey, nonce, timestamp)) {
+        if (!checkParam(grandCode, openId, openKey, nonce, timestamp)) {
             return null;
         }
         HashMap<String, Object> map = new HashMap<>(4);