import com.sun.codemodel.internal.fmt.JPropertyFile; //导入依赖的package包/类
public PrivateObjectFactoryGenerator(BeanGenerator outline, Model model, JPackage targetPackage) {
    super(outline, model, targetPackage.subPackage("impl"));

    JPackage implPkg = targetPackage.subPackage("impl");

    // put JAXBContextFactory into the impl package
    JClass factory = outline.generateStaticClass(JAXBContextFactory.class,implPkg);

    // and then put jaxb.properties to point to it
    JPropertyFile jaxbProperties = new JPropertyFile("jaxb.properties");
    targetPackage.addResourceFile(jaxbProperties);
    jaxbProperties.add(
        JAXBContext.JAXB_CONTEXT_FACTORY,
        factory.fullName());
}