如何从 url 解析 xml 获取属性 javascript

How parsing xml from url get attribute javascript

本文关键字：获取 属性 javascript xml 解析 url      更新时间：2023-09-26

我需要从网址网址xml解析xml。

<?xml version="1.0" encoding="UTF-8"?>
<exchangerates>
  <row>
    <exchangerate ccy="RUR" base_ccy="UAH" buy="0.33291" sale="0.33291"/>
  </row>
  <row>
    <exchangerate ccy="EUR" base_ccy="UAH" buy="18.60253" sale="18.60253"/>
  </row>
  <row>
    <exchangerate ccy="USD" base_ccy="UAH" buy="14.97306" sale="14.97306"/>
  </row>
</exchangerates>

我想得到使用"14.97306"转换我的货币的属性

(like mycurrency = 10 )
(like usd = 14.97306 )
(mycurrency * usd = 149.7306)

这是Java的基本设置。您需要阅读 XPATH 查询，并且需要添加异常处理等。但我相信这会让你开始。

    // open the URL
    URL url = ....
    InputStream is = url.openStream();
    // build a document parser
    DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
    domFactory.setNamespaceAware(true);
    DocumentBuilder builder = domFactory.newDocumentBuilder();
    // parse the document from the URL
    Document d = builder.parse(is);
    // set up XPATH to examine/query the XML
    XPathFactory factory = XPathFactory.newInstance();
    XPath xpath = factory.newXPath();
    // use XPATH query to find the required information
    String sale = xpath.evaluate("/exchangerates/row[@ccy='USD']/@sale", d);
    System.out.println("USD sale is "+sale);
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