public XmlBean() {
 }

 /**
  * 读取XML文件所有信息
  */
 public Vector LoadXML(String path) throws Exception {
  Vector xmlVector = null;
  FileInputStream fi = null;
  try {
   fi = new FileInputStream(path);
   xmlVector = new Vector();
   SAXBuilder sb = new SAXBuilder();
   Document doc = sb.build(fi);
   Element root = doc.getRootElement(); // 得到根元素
   List books = root.getChildren(); // 得到根元素所有子元素的集合
   Element book = null;
   XmlBean xml = null;
   for (int i = 0; i < books.size(); i++) {
    xml = new XmlBean();
    book = (Element) books.get(i); // 得到第一本书元素
    xml.setbookname(book.getChild("书名").getText());
    xml.setauthor(book.getChild("作者").getText());
    xml.setpub(book.getChild("出版社").getText());
    xml.setprice(book.getChild("价格").getText());
    xml.setpubdate(book.getChild("出版日期").getText());
    xmlVector.add(xml);
   }
  } catch (Exception e) {
   System.err.println(e + "error");
  } finally {
   try {
    fi.close();
   } catch (Exception e) {
    e.printStackTrace();
   }
  }
  return xmlVector;
 }

 /**
  * 删除XML文件指定信息
  */
 public static void DelXML(HttpServletRequest request) throws Exception {
  FileInputStream fi = null;
  FileOutputStream fo = null;
  try {
   request.setCharacterEncoding("GBK");
   String path = request.getParameter("path");
   int xmlid = Integer.parseInt(request.getParameter("id"));
   fi = new FileInputStream(path);
   SAXBuilder sb = new SAXBuilder();
   Document doc = sb.build(fi);
   Element root = doc.getRootElement(); // 得到根元素
   List books = root.getChildren(); // 得到根元素所有子元素的集合
   books.remove(xmlid);// 删除指定位置的子元素
//   String indent = " ";
//   boolean newLines = true;
//   XMLOutputter outp = new XMLOutputter(indent, newLines, "GBK");
      Format format = Format.getPrettyFormat();
      format.setIndent("  ");
      format.setEncoding("utf-8");
      XMLOutputter outp = new XMLOutputter(format);
   fo = new FileOutputStream(path);
   outp.output(doc, fo);
  } catch (Exception e) {
   System.err.println(e + "error");
  } finally {
   try {
    fi.close();
    fo.close();
   } catch (Exception e) {
    e.printStackTrace();
   }
  }
 }