import org.dom4j.Document;   //導(dǎo)入dom4j API 類

import org.dom4j.DocumentException;

import org.dom4j.Element;

import org.dom4j.Attribute;

import org.dom4j.DocumentHelper;

import org.dom4j.io.OutputFormat;

import org.dom4j.io.XMLWriter;

import org.dom4j.io.SAXReader;

import java.io.*;

import java.util.List;

import java.util.Iterator;

class Rt

{

public Document generateDocument()

{

     //使用DocumentHelper 類創(chuàng)建一個(gè)文檔實(shí)例。DocumentHelper 是生成XML 文檔節(jié)點(diǎn)的dom4j API 工廠類。

     Document document = DocumentHelper.createDocument();

     //使用addElement() 方法創(chuàng)建根元素catalog 。addElement() 用于向XML 文檔中增加元素。

     Element catalogElement = document.addElement("catalog");

     //在catalog 元素中使用addComment() 方法添加注釋“An XML catalog”。

     catalogElement.addComment("An XML Catalog");

     //在catalog 元素中使用addProcessingInstruction() 方法增加一個(gè)處理指令。

     catalogElement.addProcessingInstruction("target","text");

     //在catalog 元素中使用addElement() 方法增加journal 元素。

     Element journalElement =  catalogElement.addElement("journal");

     //使用addAttribute() 方法向journal 元素添加title 和publisher 屬性

     journalElement.addAttribute("title", "XML Zone");

     journalElement.addAttribute("publisher", "IBM developerWorks");

     //向journal 元素中添加article 元素,使用addAttribute()方法向article元素添加level,date屬性

     Element articleElement=journalElement.addElement("article");

     articleElement.addAttribute("level", "Intermediate");

     articleElement.addAttribute("date", "December-2001");

     //向article元素中添加title元素

     Element  titleElement=articleElement.addElement("title");

     //使用setText() 方法設(shè)置article 元素的文本

     titleElement.setText("Java configuration with XML Schema");

     //向article元素中添加author元素

     Element authorElement=articleElement.addElement("author");

     //向author元素中添加firstname,lastname元素,并用setText()設(shè)置他們的文本

     Element  firstNameElement=authorElement.addElement("firstname");

     firstNameElement.setText("Marcello");

     Element lastNameElement=authorElement.addElement("lastname");

     lastNameElement.setText("Vitaletti");

     return document;

     //使用addDocType() 方法添加文檔類型說明

     //document.addDocType("catalog",null,"file://c:/Dtds/catalog.dtd");

    /**try

       {

        XMLWriter output = new XMLWriter(

            new FileWriter( new File("mycatalog.xml") ));

        output.write( document );

        output.close();

        }

     catch(IOException e)

     {System.out.println(e.getMessage());}**/

}

/**

 * 格式化XML文檔,并按指定字符集輸出

 * @param document

 * @param fileName

* @param encoding  編碼格式

 * @return 返回操作結(jié)果, 0表失敗, 1表成功

 */

public static int saveXml(Document document,

                                             String fileName,

                                             String encoding)

                                             throws UnsupportedEncodingException,

                                                     FileNotFoundException,

                                                     IOException{

      int returnValue = 0;

    XMLWriter output = null;

    /** 格式化輸出,類型IE瀏覽一樣*/

    OutputFormat format = OutputFormat.createPrettyPrint();

    /** 指定XML字符集編碼*/

    format.setEncoding(encoding);

    output = new XMLWriter(new FileOutputStream(new File(fileName)), format);

    output.write(document);

    output.close();       

    /** 執(zhí)行成功,需返回1 */

    returnValue = 1;   

      return returnValue;

}

/**

 * 修改XML文檔,并按指定字符集輸出

 * @param inputXml

 * @param modified_filename 修改后的文件名（含絕對路徑）

 * @return 返回操作結(jié)果, 0表失敗, 1表成功

 */

try{

   SAXReader saxReader = new SAXReader();

   Document document = saxReader.read(inputXml);

//根據(jù)XPath語法查詢結(jié)點(diǎn)catalog下的journal下的article的level屬性

   List list = document.selectNodes("/catalog/journal/article/@level" );

   Iterator iter=list.iterator();

   while(iter.hasNext()){

    Attribute attribute=(Attribute)iter.next();

    if(attribute.getValue().equals("Intermediate")) //如果屬性值是Intermediate

      attribute.setValue("Introductory");

       }

   list = document.selectNodes("http://article/@date" );

   iter=list.iterator();

   while(iter.hasNext()){

    Attribute attribute=(Attribute)iter.next();

    if(attribute.getValue().equals("December-2001"))

      attribute.setValue("October-2002");

       }

    list = document.selectNodes("http://article" );

    iter=list.iterator();

    while(iter.hasNext()){

     Element element=(Element)iter.next();

     Iterator iterator=element.elementIterator("title");

      while(iterator.hasNext()){

        Element titleElement=(Element)iterator.next();

        if(titleElement.getText().equals("Java configuration with XML Schema"))

        titleElement.setText("Create flexible and extensible XML schema");                           }

             }

    list = document.selectNodes("http://article/author" );

    iter=list.iterator();

     while(iter.hasNext()){

     Element element=(Element)iter.next();

     Iterator iterator=element.elementIterator("firstname");

     while(iterator.hasNext()){

      Element firstNameElement=(Element)iterator.next();

      if(firstNameElement.getText().equals("Marcello"))

      firstNameElement.setText("Ayesha");

                                     }

                              }

    list = document.selectNodes("http://article/author" );

    iter=list.iterator();

     while(iter.hasNext()){

      Element element=(Element)iter.next();

      Iterator iterator=element.elementIterator("lastname");

     while(iterator.hasNext()){

      Element lastNameElement=(Element)iterator.next();

      if(lastNameElement.getText().equals("Vitaletti"))

      lastNameElement.setText("Malik");

                                  }

                               }

     XMLWriter output = new XMLWriter(

      new FileWriter( new File(modified_filename) ));

     output.write( document );

     output.close();

   }

  catch(DocumentException e)

                 {

                  System.out.println(e.getMessage());

                            }

  catch(IOException e){

                       System.out.println(e.getMessage());

                    }

   /** 執(zhí)行成功,需返回1 */

    returnValue = 1;   

      return returnValue;

 }

public static void main(String[] argv)

{

   Rt savedomtoxml=new Rt();

   Document doc=savedomtoxml.generateDocument();

   try{

   int re=savedomtoxml.saveXml(doc,"savexml.xml","gb2312");  //生成的xml文件默認(rèn)狀態(tài)和類文件在同一個(gè)目錄下

   System.out.println(re);

   }

   catch(IOException e)

     {System.out.println(e.getMessage());}

   try{

   int modifyre=savedomtoxml.modifyDocument(new File("H:/dom4j/rt/orginal.xml"));

   System.out.println(modifyre);

   }

   catch(Exception e)

     {System.out.println(e.getMessage());}

}

}