看看jaxp的文档就会明白了:)
The Java API for XML Processing (JAXP) enables applications to parse and transform XML documents using an API that is independent of a particular XML processor implementation. This version of the reference implementation uses Xerces 2, as its default XML parser and Xalan as its default XSLT engine
The Java API for XML Processing (JAXP) enables applications to parse and transform XML documents using an API that is independent of a particular XML processor implementation. This version of the reference implementation uses Xerces 2, as its default XML parser and Xalan as its default XSLT engine
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