这个方法接收多个参数，包括一条sql语句和一个结果处理程序，并返回一个泛型t的对象。
This method receives several parameters, including a SQL statement and a result handler, and returns an object of generic type t.
单例、生成器和工厂方法设计模式被视为是创建型的模式，因它们可协助对象的构建。
The singleton, builder, and factory method design patterns are considered creational patterns, as they assist in the construction of objects.
因为查找器方法是特定于每个域对象的，因此将其应用于泛型DAO的类型化接口。
Because the finder methods are specific to each domain object, they are applied to the typed interfaces of the generic DAO.
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