Java 使用 JAXB 时是否总是需要 ObjectFactory 类？
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Do you always need an ObjectFactory class when using JAXB?
提问by Marcus Leon
Do you always need an ObjectFactory class when using JAXB?
使用 JAXB 时是否总是需要 ObjectFactory 类？
Without it I get this exception:
没有它我得到这个例外：
javax.xml.bind.JAXBException: "com.a.b.c" doesnt contain ObjectFactory.class or jaxb.index
javax.xml.bind.JAXBException: "com.abc" 不包含 ObjectFactory.class 或 jaxb.index
I gatherthe ObjectFactory can be overkill. But given this exception I'm guessing you need it.. but not sure why?
我收集了的ObjectFactory可以矫枉过正。但考虑到这个例外，我猜你需要它......但不知道为什么？
采纳答案by skaffman
You get that exception when you use the JAXBContext.newInstance(String)factory method, where you pass in the package name as the argument. This doesrequire the ObjectFactoryto be there, otherwise, JAXB doesn't know which classes to process.
当您使用JAXBContext.newInstance(String)工厂方法时，您会遇到该异常，在该方法中您将包名称作为参数传递。这确实需要ObjectFactory存在，否则，JAXB 不知道要处理哪些类。
If you don't have an ObjectFactory, you need to JAXBContext.newInstance(Class...)instead, passing in the explicit list of annotated classes to add to the context.
如果您没有ObjectFactory，则需要JAXBContext.newInstance(Class...)改为传入带注释的类的显式列表以添加到上下文中。
回答by bdoughan
Instead of the ObjectFactory you can include a jaxb.index file which is a text file that contains a new line seperated list of Java classes.
您可以包含一个 jaxb.index 文件，而不是 ObjectFactory，该文件是一个文本文件，其中包含一个新行分隔的 Java 类列表。
For an example of using a jaxb.index file see:
有关使用 jaxb.index 文件的示例，请参阅：
回答by Anand Rockzz
I was using Springand I just had to change
我正在使用Spring而我只需要改变
Jaxb2Marshaller mlr = new Jaxb2Marshaller();
mlr.setContextPaths("","");
to
到
Jaxb2Marshaller mlr = new Jaxb2Marshaller();
mlr.setPackagesToScan("","");
