从元素创建DOM元素

从元素创建DOM元素

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问题描述

如你所知,在Java中创建Dom Element的正确方法是做这样的事情。

As you know, the proper way to create a Dom Element in Java is to do something like this.

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

Document d;
Element e;

e = d.createElement("tag");

您需要使用d生成元素,因为它需要一个文档上下文。 (我不是100%肯定为什么,但也许误会这是我的问题的一部分)

You need to use d to generate the element because it needs a document context. (I'm not 100% sure why, but maybe misunderstanding this is part of my problem)

我不明白的是,为什么你不能做某事像这样

What I don't understand is, why you can't do something like this

Element e;
Element e2;

e2 = e.createElement("anothertag");

由于e已经具有d的上下文,为什么我不能从元素创建另一个元素?

Since e already has the context of d, why can't I create another element from an element? It would certainly simplify my design not having to keep a reference to the Document everywhere.

推荐答案

元素扩展Node,Node定义getOwnerDocument ,所以你可以这样做:

Element extends Node, and Node defines getOwnerDocument, so you could do something like this:

e2 = e.getOwnerDocument().createElement("tag");

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08-20 23:43