java修改xml中cdata区域中的某个节点
时间: 2023-11-27 12:54:28 浏览: 76
JAVA_XML-DOM的结构
要修改XML中CDATA区域中的某个节点,可以使用Java的DOM解析器和XPath表达式。
首先,使用DOM解析器将XML文件解析为DOM树。然后,使用XPath表达式选择要修改的节点。最后,使用DOM API修改该节点的值,并将DOM树写回到XML文件中。
以下是一个示例代码:
```java
import java.io.File;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
public class ModifyCDATANode {
public static void main(String[] args) throws Exception {
// Load XML file
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document doc = builder.parse(new File("input.xml"));
// Select CDATA node using XPath
XPathFactory xPathfactory = XPathFactory.newInstance();
XPath xpath = xPathfactory.newXPath();
XPathExpression expr = xpath.compile("//myNode/text()");
Node node = (Node) expr.evaluate(doc, XPathConstants.NODE);
// Modify CDATA value
node.setNodeValue("new value");
// Write DOM tree back to XML file
TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
DOMSource source = new DOMSource(doc);
StreamResult result = new StreamResult(new File("output.xml"));
transformer.transform(source, result);
}
}
```
在上面的示例中,我们选择了名为“myNode”的节点,并将其值修改为“new value”。最后,我们将修改后的DOM树写回到名为“output.xml”的文件中。
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