InputStream inStream = null;

try

{

     inStream = Dom4jDemo01.class.getResourceAsStream(

"/com/cownew/Char0502/Department01.xml");

     SAXReader reader = new SAXReader();

     Document doc = reader.read(new InputStreamReader(inStream));

     Node nameNode = doc.selectSingleNode("//department/name");

     System.out.println(" 部门名称 :" + nameNode.getText());

     Node levelNode = doc.selectSingleNode("//department/level");

     System.out.println(" 部门级别 :" + levelNode.getText());

     List employeeNodeList = doc

                   .selectNodes("//department/employeeList/employee");

     System.out.println(" 部门下属雇员 :");

     for (int i = 0, n = employeeNodeList.size(); i < n; i++)

     {

         DefaultElement employeeElement = (DefaultElement) employeeNodeList

                            .get(i);

         String name = employeeElement.attributeValue("name");

         String number = employeeElement.attributeValue("number");

         System.out.println(name + " ，工号 :" + number);

     }

} finally

{

     ResourceUtils.close(inStream);

}

import java.io.FileWriter;

import java.io.IOException;

import org.dom4j.Document;

import org.dom4j.DocumentHelper;

import org.dom4j.Element;

import org.dom4j.io.OutputFormat;

import org.dom4j.io.XMLWriter;

public class Dom4jDemo02

{

     public static void main(String[] args)

     {

         // 创建文档对象

         Document document = DocumentHelper.createDocument();

         // 添加根节点 "department"

         Element departElement = document.addElement("department");

         // 添加 "name" 节点

         Element departNameElement = DocumentHelper.createElement("name");

         departNameElement.setText(" 开发部 ");

         departElement.add(departNameElement);

         // 添加 "level" 节点

         Element departLevelElement = DocumentHelper.createElement("level");

         departLevelElement.setText("2");

         departElement.add(departLevelElement);

         // 添加员工列表 "employeeList" 节点

         Element employeeElementList = DocumentHelper

                   .createElement("employeeList");

         departElement.add(employeeElementList);

         // 添加员工节点 "employee"

         Element emp1Element = DocumentHelper.createElement("employee");

         emp1Element.addAttribute("number", "001");

         emp1Element.addAttribute("name", "Tom");

         employeeElementList.add(emp1Element);

         Element emp2Element = DocumentHelper.createElement("employee");

         emp2Element.addAttribute("number", "002");

         emp2Element.addAttribute("name", "Jim");

         employeeElementList.add(emp2Element);

         Element emp3Element = DocumentHelper.createElement("employee");

         // 添加属性

         emp3Element.addAttribute("number", "003");

         emp3Element.addAttribute("name", "Lily");

         employeeElementList.add(emp3Element);

         try

         {

              writeToFile(document, "c:/department.xml");

         } catch (IOException e)

         {

              e.printStackTrace();

         }

     }

     private static void writeToFile(Document document, String file)

              throws IOException

     {

         // 美化格式

         OutputFormat format = OutputFormat.createPrettyPrint();

         format.setEncoding("GB2312");

         XMLWriter writer = null;

         try

         {

              writer = new XMLWriter(new FileWriter(file), format);

              writer.write(document);

         } finally

         {

              if (writer != null)

                   writer.close();

         }

     }

}

public class BookInfo

{

     private String name;

     private PersonInfo author;

     public PersonInfo getAuthor()

     {

         return author;

     }

     public void setAuthor(PersonInfo author)

     {

         this.author = author;

     }

     public String getName()

     {

         return name;

     }

     public void setName(String name)

     {

         this.name = name;

     }

}

public class PersonInfo

{

     private String name;

     private String email;

     public String getEmail()

     {

         return email;

     }

     public void setEmail(String email)

     {

         this.email = email;

     }

     public String getName()

     {

         return name;

     }

     public void setName(String name)

     {

         this.name = name;

     }

}

XStream xstream = new XStream();

xstream.alias("book", BookInfo.class);

xstream.alias("author", PersonInfo.class);

InputStream inStream = XStreamDemo.class

         .getResourceAsStream("/com/cownew/Char0503/Books.xml");

InputStreamReader reader = new InputStreamReader(inStream);

BookInfo book = (BookInfo) xstream.fromXML(reader);

StringBuffer sb = new StringBuffer();

sb.append(book.getName()).append(" 的作者 ");

sb.append(book.getAuthor().getName()).append(" 的 Email 为 :");

sb.append(book.getAuthor().getEmail());

System.out.println(sb);

List bookList = new ArrayList();

PersonInfo p1 = new PersonInfo();

p1.setName("Tom");

p1.setEmail("Tom@mail.com");

PersonInfo p2 = new PersonInfo();

p2.setName("Jerry");

p2.setEmail("Jerry@mail.com");

BookInfo book1 = new BookInfo();

book1.setName("About Face");

book1.setAuthor(p1);

BookInfo book2 = new BookInfo();

book2.setName("UI Design");

book2.setAuthor(p2);

bookList.add(book1);

bookList.add(book2);

XStream xstream = new XStream();

String xml = xstream.toXML(bookList);

System.out.println(xml);

List list = (List) xstream.fromXML(xml);

for(int i=0,n=list.size();i<n;i++)

{

     BookInfo book = (BookInfo) list.get(i);

     StringBuffer sb = new StringBuffer();

     sb.append(book.getName()).append(" 的作者 ");

     sb.append(book.getAuthor().getName()).append(" 的 Email 为 :");

     sb.append(book.getAuthor().getEmail());

     System.out.println(sb);

}