JAXB和类实例化 [英] JAXB and class instantiation

问题描述

有一件事阻止使用像JAXB这样的绑定技术，而不是经典的基于dom / sax的xml技术，这个事实是，当读取xml时，它似乎强烈地面向实例化它管理的类。

One thing that prevents from using a binding technology like JAXB, instead of a classic dom/sax-based xml technology is the fact that, when reading xml, it seems to be strongly oriented to instantiate the classes that it manages.

很多时候，我想从xml读取值并将它们设置为已创建实例的属性。

有没有一种简单的方法告诉JAXB它必须将值应用于我所拥有的类而不是创建一个新的？

Many times, i want to read values from xml and set them to properties of already created instances.
Is there a simple way to tell JAXB that it has to apply values to the class that i have instead of create a new one?

推荐答案

将JAXB对象用作DTO。然后你可以使用 PropertyUtils.copyProperties（..） / BeanUtils.copyProperties（..）（来自commons-beanutils ）将属性传输到已经部分填充的对象。

Use the JAXB objects as DTOs. Then you can use PropertyUtils.copyProperties(..) / BeanUtils.copyProperties(..) (from commons-beanutils) to transfer the properties to your already-partially-populated objects.

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