我是新手,在xml.i上使用了一个xml文件,如下所示:
<?xml version="1.0" encoding="UTF-8" ?>
- <root>
- <key>
<Question>Is the color of the car</Question>
<Ans>black?</Ans>
</key>
- <key>
<Question>Is the color of the car</Question>
<Ans>black?</Ans>
</key>
- <key>
<Question>Is the news paper</Question>
<Ans>wallstreet?</Ans>
</key>
- <key>
<Question>fragrance odor</Question>
<Ans>Lavendor?</Ans>
</key>
- <key>
<Question>Is the baggage collector available</Question>
<Ans />
</key>
</root>
从上面的xml我只想改变
<Ans>wallstreet?</Ans> as <Ans>WonderWorld</Ans>.
我怎样才能更改wallstreet?作为WonderWorld?通过我的java应用程序。
我编写了如下所示的java方法:
public void modifyNodeval(){
try{
DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
Document doc = docBuilder.parse(new File(path));
Node nodes1 = doc.getElementsByTagName("*");
for(int j=0;j<nodes1.getLength();j++)
{
//Get the staff element by tag name directly
Node nodes = doc.getElementsByTagName("key").item(j);
//loop the staff child node
NodeList list = nodes.getChildNodes();
for (int i = 0; i != list.getLength(); ++i)
{
Node child = list.item(i);
if (child.getNodeName().equals("Ans")) {
child.getFirstChild().setNodeValue("WonderWorld") ;
System.out.println("tag val modified success fuly");
}
}
}
TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
DOMSource source = new DOMSource(doc);
StreamResult result = new StreamResult(path);
transformer.transform(source, result);
}
catch (Exception e)
{
e.printStackTrace();
}
}
通过使用上面的代码,我能够将所有标签文本更改为奇迹世界,但我的意图是我只想更改wallstreet?作为WonderWorld。
任何身体请帮帮我.....
答案 0 :(得分:4)
我建议XPath使用更少的代码选择您想要编辑的内容:
XPath xpath = XPathFactory.newInstance().newXPath();
Element e = (Element) xpath.evaluate("//Ans[. = 'wallstreet']", document, XPathConstant.NODE);
if (e != null)
e.setTextContent("Wonderland");
答案 1 :(得分:2)
使用
if (child.getNodeName().equals("Ans") && child.getTextContent().equals("wallstreet?"))
作为你的条件。
答案 2 :(得分:1)
您没有检查节点的值是否为“wallstreet?” - 所以它只是改变每个第一个子节点。
String str = child.getFirstChild( ).getNodeValue( );
if ( "wallstreet?".compareTo( str ) == 0 )
{
child.getFirstChild( ).setNodeValue( "WonderWorld" );
System.out.println( "tag val modified success fuly" );
}