xml 文件的读写

这个是用dom4j 的外部包来解释的，所以需要引用外部的包

直接看代码

List list = userService.finaALL();

if (list != null) {

Document doc = DocumentHelper.createDocument();

//生成根元素

Element element = doc.addElement("list");

int i = 0;

for (User user : list) {

Element userXML = element.addElement("record");

Element username = userXML.addElement("username");

username.setText(user.getUsername());

Element grade = userXML.addElement("grade");

grade.setText(user.getGrade().toString());

Element order = userXML.addElement("order");

order.setText(Integer.valueOf(i++).toString());

Element type = userXML.addElement("type");

type.setText(Const.JAVA);

}

StringWriter strWtr = new StringWriter();

OutputFormat format = OutputFormat.createPrettyPrint();

format.setEncoding("UTF-8");

XMLWriter xmlWriter = new XMLWriter(strWtr, format);

try {

xmlWriter.write(doc);

} catch (IOException e1) {

// TODO Auto-generated catch block

e1.printStackTrace();

}

response.getWriter().write(strWtr.toString());

}

////////////////////////////////////////////////////////////////////////////////////////////////////////////////

上面是生成xml 文件的代码

以下是解释XML文件的代码

public String[][] getAll() {

String [][] array = new String[100][4]; 

String s="";

try {

URL url = new URL(Const.URL_LOCAL+Const.FIND_ALL); //求求的接口

BufferedReader br = new BufferedReader(new InputStreamReader(

                url.openStream()));

System.out.println(br.toString());

        String line = null;

        while (null != (line = br.readLine()))

        {

            System.out.println(line);

            s+=line;

        }

        } catch (MalformedURLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

System.out.println(s);

SAXReader reader = new SAXReader();

        StringReader sr = new StringReader(s);

        InputSource is = new InputSource(sr);

        try {

            Document document = reader.read(is);

            Element root = document.getRootElement();

            List servletList = root.elements();

            System.out.println(servletList.size());

//             List userList = servletList.get(0).elements("User");

            for(int i=0;i

            Element element = servletList.get(i);

            List childList = element.elements();

            for(int j=0;j

            Element e = childList.get(j);

            array[i][j] = e.getText();

            System.out.println(e.getName()+"="+e.getText());

            }

        }

             

        }catch(DocumentException e){

        e.printStackTrace();

        }

return array;

}