当我尝试使用java 1.7生成javadoc时，由于下面提到的异常，我收到一个错误，而当我使用java 1.6时，它正在成功生成javadoc。出现异常的metod在jar文件中。
我在日志中收到的错误如下：
[javadoc] javadoc: error - In doclet class com.vignette.portal.ant.internal.buildutility.doclet.VignetteDoclet, method start has thrown an exception java.lang.reflect.InvocationTargetException
[javadoc] java.util.MissingResourceException: Can't find resource for bundle com.sun.tools.doclets.internal.toolkit.resources.doclets, key doclet.Package
[javadoc] at java.util.ResourceBundle.getObject(ResourceBundle.java:395)
[javadoc] at java.util.ResourceBundle.getString(ResourceBundle.java:355)
[javadoc] at com.sun.tools.doclets.internal.toolkit.util.MessageRetriever.getText(MessageRetriever.java:100)
[javadoc] at com.sun.tools.doclets.internal.toolkit.Configuration.getText(Configuration.java:659)
[javadoc] at com.sun.tools.doclets.formats.html.markup.HtmlWriter.<init>(HtmlWriter.java:173)
[javadoc] at com.sun.tools.doclets.formats.html.markup.HtmlDocWriter.<init>(HtmlDocWriter.java:65)
[javadoc] at com.vignette.portal.ant.internal.buildutility.doclet.abstraction.HtmlStandardWriter.<init>(HtmlStandardWriter.java:96)
[javadoc] 1 error
[javadoc] at com.vignette.portal.ant.internal.buildutility.doclet.SecondaryPageTypeDoclet$PackageFrame.<init>(SecondaryPageTypeDoclet.java:99)
[javadoc] at com.vignette.portal.ant.internal.buildutility.doclet.SecondaryPageTypeDoclet.generate(SecondaryPageTypeDoclet.java:66)
[javadoc] at com.vignette.portal.ant.internal.buildutility.doclet.VignetteDoclet.startGeneration(VignetteDoclet.java:74)
[javadoc] at com.vignette.portal.ant.internal.buildutility.doclet.abstraction.Standard.start(Standard.java:66)
[javadoc] at com.vignette.portal.ant.internal.buildutility.doclet.VignetteDoclet.start(VignetteDoclet.java:46)
[javadoc] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[javadoc] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
[javadoc] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[javadoc] at java.lang.reflect.Method.invoke(Method.java:606)
[javadoc] at com.sun.tools.javadoc.DocletInvoker.invoke(DocletInvoker.java:280)
[javadoc] at com.sun.tools.javadoc.DocletInvoker.start(DocletInvoker.java:160)
[javadoc] at com.sun.tools.javadoc.Start.parseAndExecute(Start.java:397)
[javadoc] at com.sun.tools.javadoc.Start.begin(Start.java:167)
[javadoc] at com.sun.tools.javadoc.Main.execute(Main.java:59)
[javadoc] 7429 warnings
[javadoc] at com.sun.tools.javadoc.Main.main(Main.java:49)