如何使用Java属性文件？

问题描述

我有一个配置值的键/值对列表，我希望将其存储为Java属性文件，然后加载并迭代。

I have a list of key/value pairs of configuration values I want to store as Java property files, and later load and iterate through.

问题：

• 我是否需要将文件存储在与将加载它们的类相同的包中，或者是否存在应放置它的任何特定位置？


• 文件是否需要以任何特定扩展名结尾，或 .txt 确定？


• 如何在代码中加载文件


• 如何迭代里面的值？

• Do I need to store the file in the same package as the class which will load them, or is there any specific location where it should be placed?
• Does the file need to end in any specific extension or is .txt OK?
• How can I load the file in the code
• And how can I iterate through the values inside?

推荐答案

你可以将一个InputStream传递给Property，所​​以你的文件几乎可以在任何地方，并且可以调用任何东西。

You can pass an InputStream to the Property, so your file can pretty much be anywhere, and called anything.

Properties properties = new Properties();
try {
  properties.load(new FileInputStream("path/filename"));
} catch (IOException e) {
  ...
}

迭代为：

for(String key : properties.stringPropertyNames()) {
  String value = properties.getProperty(key);
  System.out.println(key + " => " + value);
}

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