【发布时间】：2019-07-17 01:29:52
【问题描述】：
A 试图从 https://www.boardgamegeek.com/xmlapi/boardgame/13/catan 解析 XML 并获取 Language Dependence 的最高 numvotes 的值。
这是代码：
public class DomParserDemo {
public static void main(String[] args) {
try {
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dbBuilder = dbFactory.newDocumentBuilder();
InputSource is = new InputSource(new StringReader("please paste XML from link");
Document doc = dbBuilder.parse(is);
doc.getDocumentElement().normalize();
System.out.println("Root element :" + doc.getDocumentElement().getNodeName());
NodeList nodeList = doc.getElementsByTagName("result") ;
String targetValue = "";
int maxNumVotes = 0;
for (int i = 0; i < nodeList.getLength(); i++) {
Element element = (Element) nodeList.item(i);
int numVotes = Integer.parseInt(element.getAttribute("numvotes"));
if (numVotes > maxNumVotes) {
maxNumVotes = numVotes;
targetValue = element.getAttribute("value");
}
}
System.out.println("Value: " + targetValue + " NumVotes: " + maxNumVotes);
}
catch (Exception e) {
e.printStackTrace();
}
}
}
输出：
[Fatal Error] :1:10703: The entity name must immediately follow the '&' in the entity reference.
org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 10703; The entity name must immediately follow the '&' in the entity reference.
at java.xml/com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:261)
at java.xml/com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:339)
at DomParserDemo.main(DomParserDemo.java:17)
【问题讨论】：