java - Load multiple locale specific properties files in internationalization with resource bundle in java

Question

I have four properties files

1. Application.properties
2. Application_fr_FR.properties
3. Database.properties
4. Database_fr_FR.properties

So now I need internationalization in multiple programs, so now I need to load multiple properties files and get the key-value pair of values from properties files specific to a locale. For that I have a ResourceBundleService.java

public class ResourceBundleService {
    private static String language;
    private static String country;
    private static Locale currentLocale;
    static ResourceBundle labels;
    static {
        labels = ResourceBundle
                .getBundle("uday.properties.Application");
        labels = append(Database.properties");
        //** how to append existing resource bundle with new properties file?
    }

    public static String getLabel(String resourceIndex, Locale locale) {
        return labels.getString(resourceIndex);
        //How to get locale specific messages??
    }
}

Hope the question is clear.

Answer 1

您需要在ResourceBundle.getBundle(baseName, locale)每次调用getLabel。ResourceBundle 维护一个内部缓存，因此它不会每次都加载所有道具文件：

public static String getLabel(String resourceIndex, Locale locale) {
    ResourceBundle b1 = ResourceBundle.getBundle("uday.properties.Application", locale);
    if (b1.contains(resourceIndex)) {
       return b1.getString(resourceIndex);
    }
    ResourceBundle b2 = ResourceBundle.getBundle("uday.properties.Database", locale);
    return b2.getString(resourceIndex);
}

Answer 2

暂时使用Application_fr.properties；les Canadiens将不胜感激。Locale.setDefault(availableLocale)选择一个可用的语言环境。根区域设置属性 Application.properties 还应包含语言键。你可以复制法国的。在这种情况下，您无需设置默认语言环境。

Answer 3

让我们在github上检查一下这个实现，它真的很好用。它需要以下函数命名约定：

MultiplePropertiesResourceBundle 是一个抽象的基本实现，允许组合来自多个属性文件的 ResourceBundle，而这些属性文件必须以相同的名称结尾 - 这些组合 ResourceBundle 的基本名称。

如果您首先使用它，则需要实现抽象类MultiplePropertiesResourceBundle，如下所示：

import ch.dueni.util.MultiplePropertiesResourceBundle;

public class CombinedResources extends MultiplePropertiesResourceBundle {

    public  CombinedResources() {
        super("package_with_bundles");
    }

}

那么你应该实现扩展的空类CombinedResources：

public class CombinedResources_en extends CombinedResources {}

等等其他语言。之后，您可以按如下方式使用您的捆绑包：

ResourceBundle bundle = ResourceBundle.getBundle("CombinedResources");

这个包将使用里面的所有属性文件package_with_bundles。有关更多信息，请查看 github repo。