采用当前最流行的c3p0实现的数据库连接池。封装了jdbc的api，可以直接返回对象。封装了异构操作的代码，提供了同构操作的结构。-Using the current implementation of the most popular database connection pool c3p0. Encapsulates the jdbc api, can directly return objects. Heterogeneous operation code package provide

Resource demo for deverlopment core java project!