使用属性文件而不是静态最终变量 [英] Use properties file instead of static final variables

问题描述

我有很多类，静态final字段用作默认值或配置。什么是最好的方法来创建全局配置文件？我应该将这些字段移动到单个静态类，使用属性文件或什么？

编辑：我需要在java类和xhtml页面中使用这个值。值不依赖于环境。我可以编译项目来设置新的值 - 没有问题。

解决方案

b

• 如果值根据运行时环境（例如数据库连接设置，外部服务器IP）而改变，或者很可能经常/很快改变，则在属性文件中放置东西


• 尽可能使用 enum 到 static final 常量（避免stringly typed ）


• 查找可能具有所需内容的现有库（例如，使用 TimeUnit 将小时转换为秒，而不是 static final int SECONDS_IN_HOUR = 3600; / code>）


• 剩下的是什么（希望不会很快改变），使用 public static final





I have many classes with static final fields which are used as default values or config. What is best approach to create global config file? Should I move these fields to single static class, use properties file or what?

Edit: I need to use this values both in java classes and xhtml pages. Values dosen't depend on envirnoment. I could compile project to set new values - no problem.

解决方案

The answer depends...

• Put stuff in properties files if the values change depending on runtime environment (eg database connection settings, foreign server IPs), or that will likely change often/soon
• Prefer using enum to static final constants where possible (avoid "stringly typed" code)
• Find an existing library that might have what you want (eg use TimeUnit to convert hours to seconds, rather than having static final int SECONDS_IN_HOUR = 3600;)
• What's left (that hopefully isn't going to change any time soon), use public static final in the class that has "most ownership" over them
• Avoid classes that have static methods that return a constant - it's just code bloat

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