[자바/사용자함수] XPath를 이용한 사용자 XML파싱 함수

import java.io.IOException; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import javax.xml.xpath.XPath; import javax.xml.xpath.XPathConstants; import javax.xml.xpath.XPathExpressionException; import javax.xml.xpath.XPathFactory;   import org.w3c.dom.Document; import org.w3c.dom.Node; import org.w3c.dom.NodeList; import org.xml.sax.SAXException;   public class XMLParser {         private static final String CONST_PRE_PIX = "//";         private DocumentBuilderFactory factory;         private DocumentBuilder builder;         private Document document;         private XPathFactory xPathfactory;         private XPath xpath;                         public XMLParser() {                try {                        factory = DocumentBuilderFactory.newInstance();                        builder = factory.newDocumentBuilder();                        xPathfactory = XPathFactory.newInstance();                        xpath = xPathfactory.newXPath();                                       } catch (ParserConfigurationException e) {                        e.printStackTrace();                }         }                 /**          * @param path          * @throws Exception          * XML 파일 경로          */         public void setXML(String path) throws Exception {                 try {                        document = builder.parse("D:/env/workspace/TEST/Test01/temp/test.xml");                } catch (SAXException e) {                                    throw new Exception("XML파일이 정상적인 포맷이 아닙니다.");                } catch (IOException e) {                        throw new Exception("해당 경로에 XML파일을 찾을 수 없습니다.");                }                      }           /**          * @param path          * @return          * @throws Exception          * 리스트 형태의 노드 획득          */         public NodeList getNodeList(String path) throws Exception {                NodeList nodeList = null;                             try {                        nodeList = (NodeList) xpath.evaluate( CONST_PRE_PIX + path, document, XPathConstants.NODESET);                } catch (XPathExpressionException e) {                        throw new Exception("해당 표현식에 해당하는 경로가 없습니다.");                }                return nodeList;         }                 /**          * @param path          * @return          * @throws Exception          * 하나의 노드 획득          */         public Node getNode(String path) throws Exception {                Node node = null;                             try {                        node = (Node) xpath.evaluate( CONST_PRE_PIX +  path, document, XPathConstants.NODE);                } catch (XPathExpressionException e) {                        throw new Exception("해당 표현식에 해당하는 경로가 없습니다.");                }                return node;         }           /**          * @param path          * @return          * @throws Exception          * 노드의 텍스트 획득          */         public String getText(String path) throws Exception {                String text = null;                           try {                         text = (String) xpath.evaluate( CONST_PRE_PIX + path, document, XPathConstants.STRING);                } catch (XPathExpressionException e) {                        throw new Exception("해당 표현식에 해당하는 경로가 없습니다.");                }                return text;         } }