Java 从类路径加载 ResourceBundle
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/20524950/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Load ResourceBundle from classpath
提问by svager
I have two jar files. One of the jars needs to read language pack from another jar. Here is basic structure of both jars
我有两个 jar 文件。其中一个 jar 需要从另一个 jar 中读取语言包。这是两个罐子的基本结构
jar1
|--com.example.BundleLoader
jar2
|--strings
|--language.properties
|--language_fr.properties
Language pack is on the classpath. In order to read language packs by the BundleLoader I am trying to use ResourseBundle in conjunction with ClassLoader.
语言包在类路径上。为了通过 BundleLoader 读取语言包，我尝试将 ResourseBundle 与 ClassLoader 结合使用。
This is how I am attempting to do that
这就是我尝试这样做的方式
<--snipet-->
private ResourceBundle englishStrings = null;
private ResourceBundle frenchStrings = null;
<--end of snippet--->
<---snippet--->
System.out.println("About to load url from classpath for properties file "+bundleLocation);
URL url=ClassLoader.getSystemResource(bundleLocation);
bundleLocation=url.toString();
System.out.println("Ok loaded it");
System.out.println("url is "+(url==null?"not available":url.toString())); //Got the folder location
try {
URL[] urls = {new URL(bundleLocation)}; //created array of ULRs to be loaded by URLClassLoader
this.englishStrings = ResourceBundle.getBundle("validationStrings", Locale.getDefault(),new URLClassLoader(urls)); //Exception here
this.frenchStrings = ResourceBundle.getBundle("validationStrings", Locale.FRENCH,new URLClassLoader(urls));
} catch (MalformedURLException e1)
{// TODO Auto-generated catch block
e1.printStackTrace();
}
}
<--End of Snippet-->
The Exception that I get is
我得到的例外是
java.lang.ExceptionInInitializerError
at com.example.Model.model.dObject.doCommon(dObject.java:70)
at com.example.Model.model.dObject.validate(dObject.java:42)
at com.example.Model.model.test.dObjectTest.testChpValidate(dObjectTest.java:49)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.junit.runners.model.FrameworkMethod.runReflectiveCall(FrameworkMethod.java:47)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.accessthis.englishStrings = ResourceBundle.getBundle("strings.language");
this.frenchStrings = ResourceBundle.getBundle("strings.language", Locale.FRENCH);
0(ParentRunner.java:53)
at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:229)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.util.MissingResourceException: Can't find bundle for base name validationStrings, locale en_CA
at java.util.ResourceBundle.throwMissingResourceException(ResourceBundle.java:1499)
at java.util.ResourceBundle.getBundleImpl(ResourceBundle.java:1322)
at java.util.ResourceBundle.getBundle(ResourceBundle.java:1028)
at com.example.util.Strings.<init>(Strings.java:51)
at com.example.util.Strings.<clinit>(Strings.java:26)
... 27 more
Basically I can't find bundles even though property files are in the folder. Have anyone ran into this? I assume that someone dealt with this before.
基本上，即使属性文件在文件夹中，我也找不到包。有没有人遇到过这个？我假设之前有人处理过这个问题。
Thank you.
谢谢你。
采纳答案by Kelsey Francis
ResourceBundle.getBundle("validationStrings", Locale.FRENCH)will look in any JAR on the classpath for a file called validationStrings_fr.propertiesdirectly under the root directory. If it can't find that, it will try validationStrings.properties.
ResourceBundle.getBundle("validationStrings", Locale.FRENCH)将在类路径上的任何 JAR 中查找validationStrings_fr.properties直接在根目录下调用的文件。如果找不到，它会尝试validationStrings.properties。
If you aren't able to change the structure of the language pack JAR, try replacing your entire second snippet with just
如果您无法更改语言包 JAR 的结构，请尝试将整个第二个代码段替换为
##代码##The englishStringsline will look for files strings/language_en_CA.properties(assuming your default locale is en_CA), and then fall back to strings/language.propertieswhen it cannot find that. The frenchStringsline will look for strings/language_fr.properties.
该englishStrings行将查找文件strings/language_en_CA.properties（假设您的默认语言环境是en_CA），然后strings/language.properties在找不到文件时返回。该frenchStrings行将查找strings/language_fr.properties.
