White list generating method and device and method for data access

The invention discloses a white list generating method and a device and a method for data access. The device can comprise a mapping rule base, an SQL (structured query language) generating module and a persistent object access module, wherein the mapping rule base is used for storing mapping rules; the SQL generating module is used for extracting one mapping rule from the mapping rule base, and generating an SQL sentence according to the extracted mapping rule; the persistent object access module is used for accessing object data in a relational database according to the SQL sentence. The device has the advantages that information is extracted from a data dictionary (namely the mapping rule base) to generate the corresponding SQL sentence, so that the object access time of a persistent layer is shortened in the extraction and generation process, and the performance is greatly improved. 本发明公开了种白名单生成方法和相关的用于数据存取的装置及方法。所述装置可以包括：映射规则库，存储有映射规则；SQL生成模块，用于从所述映射规则库抽取映射规则并根据所述抽取的映射规则生成SQL语句；持久对象存取模块，用于根据所述SQL语句对关系数据库进