java - 在java中从XML中获取子节点的值

Question

我的 xml 文件看起来像这样

 <InNetworkCostSharing>
                <FamilyAnnualDeductibleAmount>
                    <Amount>6000</Amount>
                </FamilyAnnualDeductibleAmount>
                <IndividualAnnualDeductibleAmount>
                    <NotApplicable>Not Applicable</NotApplicable>
                </IndividualAnnualDeductibleAmount>
                <PCPCopayAmount>
                    <CoveredAmount>0</CoveredAmount>
                </PCPCopayAmount>
                <CoinsuranceRate>
                    <CoveredPercent>0</CoveredPercent>
                </CoinsuranceRate>
                <FamilyAnnualOOPLimitAmount>
                    <Amount>6000</Amount>
                </FamilyAnnualOOPLimitAmount>
                <IndividualAnnualOOPLimitAmount>
                    <NotApplicable>Not Applicable</NotApplicable>
                </IndividualAnnualOOPLimitAmount>
 </InNetworkCostSharing>

我正在尝试从 <FamilyAnnualDeductibleAmount> 获取 Amount 值还有来自 <FamilyAnnualOOPLimitAmount> .我如何在 Java 中获取这些值？

Answer 1

您可以使用两个 XPath 查询 /InNetworkCostSharing/FamilyAnnualDeductibleAmount 和 InNetworkCostSharing/FamilyAnnualOOPLimitAmount 或者只获取节点 InNetworkCostSharing 并检索其值两个直系子女。

使用 XPath 的解决方案:

// load the XML as String into a DOM Document object
DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
ByteArrayInputStream bis = new ByteArrayInputStream("YOUR XML".getBytes());
Document doc = docBuilder.parse(bis);

// XPath to retrieve the content of the <FamilyAnnualDeductibleAmount> tag
XPath xpath = XPathFactory.newInstance().newXPath();
XPathExpression expr = xpath.compile("/InNetworkCostSharing/FamilyAnnualDeductibleAmount/text()");
String familyAnnualDeductibleAmount = (String)expr.evaluate(doc, XPathConstants.STRING);