javaでDOM（１） の変更点

• 追加された行はこの色です。
• 削除された行はこの色です。
• javaでDOM（１） へ行く。
• javaでDOM（１） の差分を削除

[[javaでXpathを使う（１）]]

 package example.ex3;
 
 import java.io.BufferedReader;
 import java.io.File;
 import java.io.FileReader;
 import java.io.IOException;
 import java.io.StringReader;
 import java.io.StringWriter;
 
 import javax.xml.parsers.DocumentBuilder;
 import javax.xml.parsers.DocumentBuilderFactory;
 import javax.xml.parsers.ParserConfigurationException;
 import javax.xml.transform.Transformer;
 import javax.xml.transform.TransformerException;
 import javax.xml.transform.TransformerFactory;
 import javax.xml.transform.dom.DOMSource;
 import javax.xml.transform.stream.StreamResult;
 import javax.xml.xpath.XPath;
 import javax.xml.xpath.XPathConstants;
 import javax.xml.xpath.XPathExpression;
 import javax.xml.xpath.XPathExpressionException;
 import javax.xml.xpath.XPathFactory;
 
 import org.w3c.dom.Document;
 import org.w3c.dom.NodeList;
 import org.xml.sax.InputSource;
 import org.xml.sax.SAXException;
 
 public class XMLSample1 {
 
 
     private static final String IN_FILENAME="D:\\MyDocument\\00_プロジェクト資料\\H22NDL\\開発環境\\workspacetest\\00_HadoopTest\\data\\xmltestdata\\TestFileName.xml";
     private static final String OUT_FILENAME="D:\\MyDocument\\00_プロジェクト資料\\H22NDL\\開発環境\\workspacetest\\00_HadoopTest\\data\\xmltestdata\\OUT.xml";
     private static final String IN_FILENAME="TestFileName.xml";
     private static final String OUT_FILENAME="OUT.xml";
 
     /**
      * @param args
      */
     public static void main(String[] args) {
         // TODO 自動生成されたメソッド・スタブ
 
             try {
               // DocumentBuilderFactory インスタンスを取得
               DocumentBuilderFactory factory =
                   DocumentBuilderFactory.newInstance();
 
               factory.setNamespaceAware(true); // never forget this!
 
               File inputFile = new File(IN_FILENAME);
 
               BufferedReader br = new BufferedReader(new FileReader(IN_FILENAME));
 
               StringBuffer in = new StringBuffer();
 
               String tmp;
               while ((tmp = br.readLine()) != null){
                   in.append(tmp);
               }
 
               InputSource is = new InputSource(new StringReader(in.toString()));
 
 
               // DocumentBuilder を取得
               DocumentBuilder builder =
               factory.newDocumentBuilder();
 
               // DocumentBuilder を用いて Document オブジェクトを取得
 //              Document doc = builder.parse(new File(IN_FILENAME));
               Document doc = builder.parse(is);
               XPathFactory xPathFactory = XPathFactory.newInstance();
               XPath xpath = xPathFactory.newXPath();
 
               XPathExpression expr = xpath.compile("//book[author='Neal Stephenson']/title/text()");
 //              XPathExpression expr = xpath.compile("//book");
               Object result = expr.evaluate(doc, XPathConstants.NODESET);
 
 
               NodeList nodeList = (NodeList) result;
               for (int i = 0; i < nodeList.getLength(); i++) {
                   System.out.println(nodeList.item(i).getNodeValue());
 //                  doc.removeChild(nodeList.item(i));
               }
 
 //              System.out.println(doc.);
               StringWriter sw = new StringWriter();
               TransformerFactory tff=TransformerFactory.newInstance();
               Transformer tf = tff.newTransformer();
               tf.setOutputProperty("encoding", "UTF-8");
               tf.transform( new DOMSource(doc), new StreamResult(sw) );
 
 System.out.println(sw);
 
             } catch (SAXException e) {
                 e.printStackTrace();
             } catch (IOException e) {
                 e.printStackTrace();
             } catch (ParserConfigurationException e) {
                 e.printStackTrace();
             } catch (XPathExpressionException e) {
                 e.printStackTrace();
             } catch (TransformerException e) {
                 // TODO 自動生成された catch ブロック
                 e.printStackTrace();
             }
           }
 
 }