У меня есть xml файл:
<?xml version="1.0" encoding="UTF-8"?>
<ClOrdIDS><ClOrdID id="1"><Account>1005390</Account><Symbol>SAP</Symbol><SecurityID>4663789</SecurityID><SecurityExchange>XETR</SecurityExchange><Price>23.0</Price><Order_Type>Limit</Order_Type><Side>SELL</Side><Order_Quantity>0.001</Order_Quantity></ClOrdID><ClOrdID id="2"><Account>1005390</Account><Symbol>SAP</Symbol><SecurityID>4663789</SecurityID><SecurityExchange>XETR</SecurityExchange><Price>13.0</Price><Order_Type>Limit</Order_Type><Side>SELL</Side><Order_Quantity>0.001</Order_Quantity></ClOrdID><ClOrdID id="3"><Account>1005390</Account><Symbol>SAP</Symbol><SecurityID>4663789</SecurityID><SecurityExchange>XETR</SecurityExchange><Price>13.0</Price><Order_Type>Limit</Order_Type><Side>BUY</Side><Order_Quantity>0.001</Order_Quantity></ClOrdID><ClOrdID id="4"><Account>1005390</Account><Symbol>SAP</Symbol><SecurityID>4663789</SecurityID><SecurityExchange>XETR</SecurityExchange><Price>13.0</Price><Order_Type>Limit</Order_Type><Side>BUY</Side><Order_Quantity>0.001</Order_Quantity></ClOrdID><ClOrdID id="5"><Account>1005390</Account><Symbol>SAP</Symbol><SecurityID>4663789</SecurityID><SecurityExchange>XETR</SecurityExchange><Price>13.0</Price><Order_Type>Limit</Order_Type><Side>BUY</Side><Order_Quantity>0.001</Order_Quantity></ClOrdID><ClOrdID id="6"><Account>1005390</Account><Symbol>SAP</Symbol><SecurityID>4663789</SecurityID><SecurityExchange>XETR</SecurityExchange><Price>13.0</Price><Order_Type>Limit</Order_Type><Side>BUY</Side><Order_Quantity>0.001</Order_Quantity></ClOrdID><ClOrdID id="7"><Account>1005390</Account><Symbol>SAP</Symbol><SecurityID>4663789</SecurityID><SecurityExchange>XETR</SecurityExchange><Price>13.0</Price><Order_Type>Limit</Order_Type><Side>SELL</Side><Order_Quantity>0.001</Order_Quantity></ClOrdID></ClOrdIDS>
Как я могу извлечь элементы дочернего элемента с ClOrdID id = "3"?
БЛАГОДАРЯ
Поскольку теги на вопросе JDOM, а не DOM, вы можете использовать JDOM вместо ;-):
Document doc = new SaxBuilder().build(xmlFile);
XPathExpression<Element> xpe = XPathFactory.instance()
.compile("/ClOrdIDS/ClOrdID[@id=\"3\"]", Filters.element());
List<Element> idThrees = xpe.evaluate(doc);
Это можно сделать так
String xmlString = ...
DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();
Document doc = docBuilder.parse(xmlString);
XPathFactory xPathfactory = XPathFactory.newInstance();
XPath xpath = xPathfactory.newXPath();
String xpathExp = "/ClOrdIDS/ClOrdID[@id=\"3\"]";
NodeList childNodeList = (NodeList) xpath.evaluate(xpathExp, doc, XPathConstants.NODESET);
Вот код, который нужно сделать в VTD-XML...
import com.ximpleware.*;
public class removeElement {
public static void main(String s[]) throws VTDException{
VTDGen vg = new VTDGen();
if (!vg.parseFile("input.xml", false))
return;
VTDNav vn = vg.getNav();
AutoPilot ap = new AutoPilot(vn);
ap.selectXPath("/ClOrdIDS/ClOrdID[@id='3']");
int i=0;
while((i=ap.evalXPath())!=-1){
}
}
}