如何清除ResourceBundle缓存

问题描述

这是使用Guice在Tomcat上运行的webapp。根据文档，我们应该能够调用 ResourceBundle.clearCache（）; 来清除ResourceBundle缓存，并且可能从bundle属性文件中获取最新信息。

This is a webapp running on Tomcat, using Guice. According to the docs we should be able to call ResourceBundle.clearCache(); to clear the ResourceBundle cache and presumably get the latest from the bundle property files.

我们还尝试了以下方法：

We have also tried the following:

Class klass = ResourceBundle.getBundle("my.bundle").getClass().getSuperclass();
Field field = klass.getDeclaredField("cacheList");
field.setAccessible(true);
ConcurrentHashMap cache = (ConcurrentHashMap) field.get(null);
cache.clear(); // If i debug here I can see the cache is now empty!

和

ResourceBundle.clearCache(this.class.getClassLoader());

我期待的行为是：

1. 启动tomcat并点击页面并显示Hello World


2. 将包含Hello World的属性文件更改为Goodbye Earth


3. 使用servlet清除缓存


4. 点击页面，期望看到'Goodbye Earth'

1. Start up tomcat and hit a page and it says 'Hello World'
2. Change the properties file containing 'Hello World' to 'Goodbye Earth'
3. Clear the cache using a servlet
4. Hit the page and expect to see 'Goodbye Earth'

所以问题是，ResourceBundle.clearCache（）实际上是如何工作的？还有一些我们需要清除的通用文件缓存吗？

So question is, how is ResourceBundle.clearCache() actually working ? And is there some generic file cache we need to clear also ?

推荐答案

这对我有用：

ResourceBundle.clearCache();
ResourceBundle resourceBundle= ResourceBundle.getBundle("YourBundlePropertiesFile");
String value = resourceBundle.getString("your_resource_bundle_key");

注意：

2. 不要使用静态resourceBundle属性，请使用
   调用 clearCache（）
方法后的ResourceBundle.getBundle（）方法。

1. ResourceBundle.clearCache() is added at Java 1.6
2. Do not use a static resourceBundle property, useResourceBundle.getBundle() method after invoking clearCache()method.

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