RSA signature issues

RSA Problems encountered in parameter verification ：

1、 And PHP The problem of signature algorithm during docking ：

PHP The default is ：SHA1withRSA Signature algorithm     and JAVA Generally, our default is ：MD5withRSA  Therefore, the docking process needs to be unified

2、 Signature problem

json When JSON Package de sorting

      String jsonResult  =  JSON.toJSONString(transferDaoVo, SerializerFeature.MapSortField);
        JSONObject object =  JSON.parseObject(jsonResult);
        try{
            object.put("sign", RSAUtils.sign( jsonResult.getBytes() , privateKey ) );
            String result = JSON.toJSONString(object, SerializerFeature.MapSortField);
            return result;
        }catch (Exception e){
            logger.info(" Signature error ",e);
        }

For common parameters, use key=value&key=value Sort by