我想使用Java DOM在xml文件中插入一个节点。我实际上正在编辑一个虚拟文件的很多内容,以便像原版一样进行编码。
我想在以下文件之间添加一个开放节点和关闭节点;
<?xml version="1.0" encoding="utf-8"?>
<Memory xmlns:xyz="http://www.w3.org/2001/XMLSchema-instance"
xmlns:abc="http://www.w3.org/2001/XMLSchema" Derivative="ABC"
xmlns="http://..">
///////////<Address> ///////////(which I would like to insert)
<Block ---------
--------
-------
/>
////////// </Address> /////////(which I would like to insert)
<Parameters Thread ="yyyy" />
</Memory>
我特此请求您告诉我如何在xml文件之间插入?
提前致谢。!
我尝试过的是;
Element child = doc.createElement("Address");
child.appendChild(doc.createTextNode("Block"));
root.appendChild(child);
但这给了我一个像<; p>这样的输出
<Address> Block </Address> and not the way i expect :(
现在,我尝试过添加这些行;
Element cd = doc.createElement("Address");
Node Block = root.getFirstChild().getNextSibling();
cd.appendChild(Block);
root.insertBefore(cd, root.getFirstChild());
但是,这不是我要找的输出。我把这个输出作为 ---------
答案 0 :(得分:2)
你想要的可能是:
Node parent = block.getParentNode()
Node blockRemoved = parent.removeChild(block);
// Create address
parent.appendChild(address);
address.appendChild(blockRemoved);
这是在W3C DOM下重新连接节点的标准方法。
答案 1 :(得分:1)
下面:
DocumentBuilder b = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document document = b.parse(...);
// Parent of existing Block elements and new Address elemet
// Might be retrieved differently depending on
// actual structure
Element parent = document.getDocumentElement();
Element address = document.createElement("address");
NodeList nl = parent.getElementsByTagName("Block");
for (int i = 0; i < nl.getLength(); ++i) {
Element block = (Element) nl.item(i);
if (i == 0)
parent.insertBefore(address, block);
parent.removeChild(block);
address.appendChild(block);
}
// UPDATE: how to pretty print
LSSerializer serializer =
((DOMImplementationLS)document.getImplementation()).createLSSerializer();
serializer.getDomConfig().setParameter("format-pretty-print", Boolean.TRUE);
LSOutput output =
((DOMImplementationLS)document.getImplementation()).createLSOutput();
output.setByteStream(System.out);
serializer.write(document, output);
答案 2 :(得分:0)
我假设您使用的是W3C DOM(例如http://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html)。如果是这样,试试
insertBefore(address, block);