读写XML文件

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public  String callWriteXmlFile(Document doc, Writer w, String encoding) {
  try {
   Source source = new DOMSource(doc);

   Result result = new StreamResult(w);

   Transformer xformer = TransformerFactory.newInstance()
     .newTransformer();
   xformer.setOutputProperty(OutputKeys.ENCODING, encoding);
   xformer.transform(source, result);

  } catch (TransformerConfigurationException e) {
   e.printStackTrace();
  } catch (TransformerException e) {
   e.printStackTrace();
  }
  return SUCCESS;
}

public String writeXMLFile(String outfile,int companyid) {
  DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
  DocumentBuilder builder = null;
  try {
   builder = dbf.newDocumentBuilder();
  } catch (Exception e) {
  }
  Document doc = builder.newDocument();

  Element root = doc.createElement("Picture");
  doc.appendChild(root); // 将根元素添加到文档上

  // 获取学生信息
  //System.out.println("students_Vector.size:"+students_Vector.size());
  for (int i = 0; i    Recruitment s = (Recruitment) recruitlist.get(i);
   if(s.getCompanyid()==companyid){
   // 创建一个学生
   Element stu= doc.createElement("item");
   stu.setAttribute("PicturePath", s.getPath());
   root.appendChild(stu);// 添加属性

   // 创建文本姓名节点
   Element name = doc.createElement("descriable");

   stu.appendChild(name);
   Text tname = doc.createTextNode(s.getDes());
   name.appendChild(tname);

//  创建文本年龄节点
   Element url = doc.createElement("url");
   stu.appendChild(url); // 将age添加到学生节点上
   Text tage = doc.createTextNode(s.getUrl());
   url.appendChild(tage); // 将文本节点放在age节点上
   }
  }
  try {
   FileOutputStream fos = new FileOutputStream(outfile);
   OutputStreamWriter outwriter = new OutputStreamWriter(fos);
   // ((XmlDocument)doc).write(outwriter); //出错！
   callWriteXmlFile(doc, outwriter, "UTF-8");
   outwriter.close();
   fos.close();
  } catch (Exception e) {
   e.printStackTrace();
  }
  return SUCCESS;
}