java - 使用java解析xml中的元素数组

Question

这里，我使用 SAX 方法来解析数组。我面临一个问题，我无法编写通用代码来解析 xml 数组类型。我找不到通用方法的解决方案来将其识别为数组并迭代它并将其存储在列表中

<bookstore>
  <book category="children">
    <title>Harry Potter</title>
    <author>J K. Rowling</author>
    <year>2005</year>
    <price>29.99</price>
  </book>
  <book category="web">
    <title>Learning XML</title>
    <author>Erik T. Ray</author>
    <year>2003</year>
    <price>39.95</price>
  </book>
</bookstore>

任何解决方案都会有帮助。提前致谢

Answer 1

我使用下面的代码。我从: https://github.com/niteshapte/generic-xml-parser 得到它

public class GenericXMLParserSAX extends DefaultHandler {

    private ListMultimap<String, String> listMultimap = ArrayListMultimap.create();
    String tempCharacter;   
    private String[] startElements;
    private String[] endElements;

    public void setStartElements(String[] startElements) {
            this.startElements = startElements;
    }

    public String[] getStartElements() {
            return startElements;
    }

    public void setEndElements(String[] endElements) {
            this.endElements = endElements;
    }

    public String[] getEndElements() {
            return endElements;
    }

    public void parseDocument(String xml, String[] startElements, String[] endElements) {
            setStartElements(startElements);
            setEndElements(endElements);

            SAXParserFactory spf = SAXParserFactory.newInstance();
            try {
                    SAXParser sp = spf.newSAXParser();                      
                    InputStream inputStream = new ByteArrayInputStream(xml.getBytes());                     
                    sp.parse(inputStream, this);
            } catch(SAXException se) {
                    se.printStackTrace();
            } catch(ParserConfigurationException pce) {
                    pce.printStackTrace();
            } catch (IOException ie) {
                    ie.printStackTrace();
            }
    }

    public void parseDocument(String xml, String[] endElements) {           
            setEndElements(endElements);

            SAXParserFactory spf = SAXParserFactory.newInstance();
            try {
                    SAXParser sp = spf.newSAXParser();                      
                    InputStream inputStream = new ByteArrayInputStream(xml.getBytes());                     
                    sp.parse(inputStream, this);
            } catch(SAXException se) {
                    se.printStackTrace();
            } catch(ParserConfigurationException pce) {
                    pce.printStackTrace();
            } catch (IOException ie) {
                    ie.printStackTrace();
            }
    }

    @Override
    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
            String[] startElements = getStartElements();

            if(startElements!= null){
                    for(int i = 0; i < startElements.length; i++) {
                            if(qName.startsWith(startElements[i])) {                                
                                    listMultimap.put(startElements[i], qName);
                            }
                    }       
            }
    }

    @Override
    public void characters(char[] ch, int start, int length) throws SAXException {
            tempCharacter = new String(ch, start, length);
    }

    @Override
    public void endElement(String uri, String localName, String qName) throws SAXException {                
            String[] endElements = getEndElements();

            for(int i = 0; i < endElements.length; i++) {
                    if (qName.equalsIgnoreCase(endElements[i])) {
                            listMultimap.put(endElements[i], tempCharacter);                
                    }
            }
    }

    public ListMultimap<String, String> multiSetResult() {            
            return listMultimap;
    }
}