使用XPathJava设置节点值
我试图通过XPath设置节点值。我有以下内容,但它似乎没有改变实际的文件值使用XPathJava设置节点值,java,xpath,xmlnode,Java,Xpath,Xmlnode,我试图通过XPath设置节点值。我有以下内容,但它似乎没有改变实际的文件值 XPathFactory factory = XPathFactory.newInstance(); XPath xPath = factory.newXPath(); xPathExpression = "//test"; xPathValue= "111"; NodeList nodes = (NodeList) xPath.evaluate(xPathExpression, new InputSource(ne
XPathFactory factory = XPathFactory.newInstance();
XPath xPath = factory.newXPath();
xPathExpression = "//test";
xPathValue= "111";
NodeList nodes = (NodeList) xPath.evaluate(xPathExpression, new InputSource(new FileReader(fileName)), XPathConstants.NODESET);
for (int k = 0; i < nodes.getLength(); i++)
{
System.out.println(nodes.item(k).getTextContent()); // Prints original value
nodes.item(k).setTextContent(xPathValue);
System.out.println(nodes.item(k).getTextContent()); // Prints 111 after
}
XPathFactory=XPathFactory.newInstance();
XPath=factory.newXPath();
xPathExpression=“//测试”;
xPathValue=“111”;
NodeList nodes=(NodeList)xPath.evaluate(xPathExpression,newInputSource(newFileReader(fileName)),XPathConstants.NODESET);
对于(int k=0;i
但该节点的文件内容保持不变
如何设置该节点的值
谢谢您只是在更改内存中的值,而不是文件本身中的值。您需要将修改后的文档写回文件:
Source source = new DOMSource(doc);
Result result = new StreamResult(new File(fileName));
Transformer xformer;
try {
xformer = TransformerFactory.newInstance().newTransformer();
xformer.transform(source, result);
} catch (TransformerConfigurationException e) {
// TODO Auto-generated catch block
} catch (TransformerFactoryConfigurationError e) {
// TODO Auto-generated catch block
} catch (TransformerException e) {
// TODO Auto-generated catch block
}
这些类都来自javax.xml.transform.*
(当然,您需要保存对文档的引用,以便可以写回文档(即,您将无法继续将其直接传递到evaluate
)