java - 在 Web 项目中定义一组常量的最佳方法是什么？

Question

这个问题已经有答案了:

What is the best way to implement constants in Java? [closed] (28 个回答)

已关闭 6 年前。

我正在开发一个 ejb 项目，我需要定义一组可以在整个项目中使用的常量，因此我创建了一个接口(interface)来保存我的常量集，我的问题是有更好的方法吗在Web项目中定义常量？

这是我的常量界面的示例:

public interface ejbConstant {
    final String  CONST23= "AB23";
    final String  CONST24= "AB24";
    // ..........
}

感谢您的建议

Answer 1

Sonar已经相当不错了explanation of this with examples

根据《Effective Java》一书的作者 Joshua Bloch 的说法:

The constant interface pattern is a poor use of interfaces.

That a class uses some constants internally is an implementation detail. Implementing a constant interface causes this implementation detail to leak into the class's exported API. It is of no consequence to the users of a class that the class implements a constant interface. In fact, it may even confuse them. Worse, it represents a commitment: if in a future release the class is modified so that it no longer needs to use the constants, it still must implement the interface to ensure binary compatibility. If a nonfinal class implements a constant interface, all of its subclasses will have their namespaces polluted by the constants in the interface.