从其他文档附加子元素 [英] Appending child element from other document

问题描述

在我的程序中，我必须创建一些文档创建器，并且我想将创建元素的功能分成几个类.每个类将创建一个元素，主创建者将通过接口提取该元素并附加到正文.

In my program i have to create some document creator and I want to split functionality of creating elements into several classes. Each class will create a single element and main creator will extract that element via interface and attach to body.

问题是我不想将任何参数传递给构造函数调用，例如

The thing is that i don't want to pass any arguments into constructors call e.g.

    creator.createDocument()
        .setDocumentHeader(
             new DocumentHeader()
                 .setSomeValue(41)
             )

为了简化问题，假设我有一个代码

To simplify the problem lets say that I have a code

import org.w3c.dom.Document;
import org.w3c.dom.Element;

DocumentBuilderFactory dbfac1 = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder1 = dbfac1.newDocumentBuilder();
Document document1 = docBuilder1.newDocument();

DocumentBuilderFactory dbfac2 = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder2 = dbfac2.newDocumentBuilder();
Document document2 = docBuilder2.newDocument();

Element elementFromDoc1 = document1.createElement("body");
Element elementFromDoc2 = document2.createElement("someElement");

问题是，做下面的操作合法吗?

The question is, is that legal to do the following operation?

elementFromDoc1.appendChild(elementFromDoc2);

推荐答案

您拥有的代码将抛出关于元素来自不同文档的异常.

The code you have will throw an exception about the element being from a different document.

但是，我认为您可以使用 document1.importNode.这是文档:http://docs.oracle.com/javase/7/docs/api/org/w3c/dom/Document.html#importNode(org.w3c.dom.Node,%20boolean)

However, you can use document1.importNode I think. Here is the documentation: http://docs.oracle.com/javase/7/docs/api/org/w3c/dom/Document.html#importNode(org.w3c.dom.Node,%20boolean)

这是另一个问题的示例:Java 将 XML 文档附加到现有文档

And here is an example from another question: Java appending XML docs to existing docs

这篇关于从其他文档附加子元素的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！