Question

我正在尝试使用Xpath解析xml文件。下面是我的代码。

File inputFile = new File("package.xml");
            DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
            DocumentBuilder dBuilder;

            dBuilder = dbFactory.newDocumentBuilder();

            Document doc = dBuilder.parse(inputFile);
            doc.getDocumentElement().normalize();

            XPath xPath = XPathFactory.newInstance().newXPath();

            String expression = "/package/group/table";
            NodeList nodeList = (NodeList) xPath.compile(expression).evaluate(doc, XPathConstants.NODESET);
            for (int i = 0; i < nodeList.getLength(); i++) {
                Node nNode = nodeList.item(i);
                System.out.println("\nCurrent Element :" + nNode.getNodeName());
                if (nNode.getNodeType() == Node.ELEMENT_NODE) {
                    Element eElement = (Element) nNode;
                    System.out.println("Table name : " + eElement.getAttribute("name"));
                    System.out.println("Default : " + eElement.getAttribute("default"));
                    System.out.println("ID : " + eElement.getAttribute("id"));

                }
            }
        } catch (ParserConfigurationException e) {
            e.printStackTrace();
        }

用于处理的XML文件如下：

<?xml version="1.0" encoding="UTF-8"?>
<package name="FBNK.SECTOR">
  <group name="FBNK.SECTOR">
    <table name="FBNK.SEC" default="FBNK.SECTOR" id="SECTOR.CODE">
      <column name="DESCRIPTION" size="35" type="A" position="1" singlemulti="M" subvalue="NO" mvgroupno="1" descriptor="C" />
    </table>
    <table name="FBNK.SECTOR$HIS" default="FBNK.SECTOR$HIS" id="SECTOR.CODE">
      <column name="AUDIT.DATE.TIME" size="50" position="17" singlemulti="S" subvalue="NO" descriptor="C" />
    </table>
  </group>
  <group name="funds.transfer">
    <table name="FBNK.FUNDS.TRANSFER" default="FBNK.FUNDS.TRANSFER" id="REF.NO">
      <column name="AC.CHG.REQ.ID" size="35" type="A" position="147" singlemulti="S" subvalue="NO" descriptor="C" />
      <column name="TREASURY.RATE" size="16" type="R" position="16" singlemulti="S" subvalue="NO" descriptor="C" />
    </table>
  </group>
</package>

目前我的问题是我只得到 / package / group / table下的表达式。你能帮我拿到同样的包** / group / table / column **使用Xpath？提前谢谢..

Answer 1

以下是检索当前处理的表的列的方法（引用为nNode）：

NodeList columnList = (NodeList) xPath.compile("column").evaluate(nNode, XPathConstants.NODESET);

Xpath解析带有内部子项的xml文件

1 个答案: