These are primarily interfaces for parsing and building Document and Element objects and a utility class that makes reading and writing Document streams easier.

它们主要是解析和构建 Document 和 Element 对象的接口，一个工具类使读和写 Document 流更容易。

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Writing the modified document to an output stream is equally simple (lines 6-8), using the supplied XMLOutputter class.

通过使用提供的 XMLOutputter 类，将已修改的文档写入输出流同样简单（第 6-8 行）。

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