Question

假设 blah url有以下xml，我想编写一个xpath表达式（或者如果你有其他想法来实现它），那么当输出“ graphics ”时值“ apple ”作为命令行参数提供，或者当 pfizer 作为命令行参数给出时，它输出 QA 。此外，我没有此特定xml的节点名称

<employers>
        <company-name>apple</company-name>
        <department>graphics</department>

        <company-name>pfizer</company-name>
        <department>QA</department>
</employers>

这是我到目前为止的尝试。请随意添加其他代码

 public class Xpathparser{
    public String parsing(){
    String url="http://www.blahurl.com";
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    DocumentBuilder db = dbf.newDocumentBuilder();
    Document doc = db.parse(new URL(url).openStream());
            XPathFactory xPathfactory = XPathFactory.newInstance();
            XPath xpath = xPathfactory.newXPath();
            XPathExpression expr = xpath.compile(<xpathexpression?>);
            String neededValue=expr.evaluate(expr); //not sure about this.
    // code needed to display this
    System.out.println(doc.toString());
   }}

Answer 1

给定一个分配了公司名称的Java String变量

String companyName = "apple";

您可以构造一个XPath表达式，

"//department[preceding-sibling::company-name = '" + companyName + "'][1]"

这将选择department，其前一个兄弟姐妹的company-name值由companyName给出（假设您随附的Java Document*和XPath*设施是正确的。）

在java中创建一个xpath表达式，该表达式将在运行时填充

1 个答案: