Question

我有两个jar文件。其中一个罐子需要从另一个罐子里读取语言包。这是两个罐子的基本结构

jar1    
   |--com.example.BundleLoader 



jar2
   |--strings
         |--language.properties
         |--language_fr.properties

语言包位于类路径中。为了通过BundleLoader读取语言包，我试图将ResourseBundle与ClassLoader结合使用。

这就是我试图这样做的方式

<--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-->

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$1.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$3.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
    at org.junit.runners.ParentRunner$2.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

基本上，即使属性文件在文件夹中，我也找不到捆绑包。有没有人碰到这个？我认为之前有人处理过此事。

谢谢。

Answer 1

ResourceBundle.getBundle("validationStrings", Locale.FRENCH)将在类路径上的任何JAR中查找根目录下直接名为validationStrings_fr.properties的文件。如果找不到，则会尝试validationStrings.properties。

如果您无法更改语言包JAR的结构，请尝试使用

替换整个第二个代码段

this.englishStrings = ResourceBundle.getBundle("strings.language");
this.frenchStrings = ResourceBundle.getBundle("strings.language", Locale.FRENCH);

englishStrings行会查找文件strings/language_en_CA.properties（假设您的默认语言区域为en_CA），然后在无法找到时返回strings/language.properties。 frenchStrings行会查找strings/language_fr.properties。

从类路径加载ResourceBundle

1 个答案: