Search XML

import java.io.File;
import java.util.HashMap;
import java.util.Map;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
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.NodeList;

public class Main {
  public static void main(String[] args) {
    DocumentBuilder builder = null;
    try {
      builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
    }
    catch (Exception e) {
      System.exit(1);
    }
    Document doc = null;
    try {
      doc = builder.parse(new File("shop.xml"));
    }
    catch (Exception e) {
      System.exit(1);
    }
    XPath xpath = XPathFactory.newInstance().newXPath();
    NodeList kind = null;
    try {
      kind =
        (NodeList )xpath.evaluate("//店B/分類[@ID=\"2\"]/商品", doc,
          XPathConstants.NODESET);
    }
    catch (XPathExpressionException e) {
      System.exit(1);
    }
    Map<String, Integer> items = new HashMap<String, Integer>();
    for (int i = 0; i < kind.getLength(); i++) {
      NodeList goods = kind.item(i).getChildNodes();
      String name = null;
      try {
        name =
          ((String )xpath.evaluate("名前", goods, XPathConstants.STRING)).trim();
      }
      catch (Exception e) {
      }
      // String name = goods.item(1).getTextContent().trim();
      int value = 0;
      try {
        value =
          new Integer(((String )xpath.evaluate("価格", goods,
            XPathConstants.STRING)).trim());
      }
      catch (Exception e) {
      }
      items.put(name, value);
    }
    System.out.println(items);
  }
}