JDBC 是个"低级"接口，也就是说，它用于直接调用 SQL 命令。在这方面它的功能极佳，并比其它的数据库连接 API 易于使用，但它同时也被设计为一种基础接口，在它之上可以建立高级接口和工具。高级接口是"对用户友好的"接口，它使用的是一种更易理解和更为方便的 API，这种API在幕后被转换为诸如 JDBC 这样的低级接口。 -JDBC is a " low level"　interface, that is, it used direct calls to SQL commands. In this regard, it features excellent, and the database connection API than other easy to use, but it also is designed to be a basic interface on top of it can create high-level interfaces and tools. Advanced interface is " user friendly"　interface, which uses a more convenient and easier to understand the API, this API behind the scenes to be converted to low-level interfaces such as JDBC.