holen.xml

<?xml version="1.0" encoding="UTF-8"?>

<books>

?????? <!--This is a test for dom4j, holen, 2004.9.11-->

?????? <book show="yes">

????????????? <title>Dom4j Tutorials</title>

?????? </book>

?????? <book show="yes">

????????????? <title>Lucene Studing</title>

?????? </book>

?????? <book show="no">

????????????? <title>Lucene in Action</title>

?????? </book>

?????? <owner>O'Reilly</owner>

</books>

?

??? /**

??? ? * 建立一個 XML 文檔 , 文檔名由輸入屬性決定

??? ? * @param filename 需建立的文件名

??? ? * @return 返回操作結果 , 0 表失敗 , 1 表成功

??? ? */

??? public int createXMLFile(String filename){

?????? /** 返回操作結果 , 0 表失敗 , 1 表成功 */

?????? int returnValue = 0;

?????? /** 建立 document 對象 */

?????? Document document = DocumentHelper.createDocument();

?????? /** 建立 XML 文檔的根 books */

?????? Element booksElement = document.addElement( "books" );

?????? /** 加入一行注釋 */

?????? booksElement.addComment( "This is a test for dom4j, holen, 2004.9.11" );

?????? /** 加入第一個 book 節點 */

?????? Element bookElement = booksElement.addElement( "book" );

?????? /** 加入 show 屬性內容 */

?????? bookElement.addAttribute( "show" , "yes" );

?????? /** 加入 title 節點 */

?????? Element titleElement = bookElement.addElement( "title" );

?????? /** 為 title 設置內容 */

?????? titleElement.setText( "Dom4j Tutorials" );

??????

?????? /** 類似的完成后兩個 book */

?????? bookElement = booksElement.addElement( "book" );

?????? bookElement.addAttribute( "show" , "yes" );

?????? titleElement = bookElement.addElement( "title" );

?????? titleElement.setText( "Lucene Studing" );

?????? bookElement = booksElement.addElement( "book" );

?????? bookElement.addAttribute( "show" , "no" );

?????? titleElement = bookElement.addElement( "title" );

?????? titleElement.setText( "Lucene in Action" );

??????

?????? /** 加入 owner 節點 */

?????? Element ownerElement = booksElement.addElement( "owner" );

?????? ownerElement.setText( "O'Reilly" );

??????

?????? try {

?????????? /** 將 document 中的內容寫入文件中 */

?????????? XMLWriter writer = new XMLWriter( new FileWriter( new File(filename)));

?????????? writer.write(document);

?????????? writer.close();

?????????? /** 執行成功 , 需返回 1 */

?????????? returnValue = 1;

?????? } catch (Exception ex){

?????????? ex.printStackTrace();

?????? }

?????????????

?????? return returnValue;

??? }

?

<?xml version="1.0" encoding="UTF-8"?>

<books><!--This is a test for dom4j, holen, 2004.9.11--><book show="yes"><title>Dom4j Tutorials</title></book><book show="yes"><title>Lucene Studing</title></book><book show="no"><title>Lucene in Action</title></book><owner>O'Reilly</owner></books>

?

??? /**

??? ? * 修改 XML 文件中內容 , 并另存為一個新文件

??? ? * 重點掌握 dom4j 中如何添加節點 , 修改節點 , 刪除節點

??? ? * @param filename 修改對象文件

??? ? * @param newfilename 修改后另存為該文件

??? ? * @return 返回操作結果 , 0 表失敗 , 1 表成功

??? ? */

??? public int ModiXMLFile(String filename,String newfilename){

?????? int returnValue = 0;

?????? try {

?????????? SAXReader saxReader = new SAXReader();

?????????? Document document = saxReader.read( new File(filename));

?????????? /** 修改內容之一 : 如果 book 節點中 show 屬性的內容為 yes, 則修改成 no */

?????????? /** 先用 xpath 查找對象 */

?????????? List list = document.selectNodes( "/books/book/@show" );

?????????? Iterator iter = list.iterator();

?????????? while (iter.hasNext()){

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

????????????? if (attribute.getValue().equals( "yes" )){

????????????????? attribute.setValue( "no" );

????????????? } ??

?????????? }

??????????

?????????? /**

?????????? ? * 修改內容之二 : 把 owner 項內容改為 Tshinghua

?????????? ? * 并在 owner 節點中加入 date 節點 ,date 節點的內容為 2004 - 09 - 11, 還為 date 節點添加一個屬性 type

?????????? ? */

?????????? list = document.selectNodes( "/books/owner" );

?????? ??? iter = list.iterator();

?????????? if (iter.hasNext()){

????????????? Element ownerElement = (Element)iter.next();

????????????? ownerElement.setText( "Tshinghua" );

????????????? Element dateElement = ownerElement.addElement( "date" );

????????????? dateElement.setText( "2004-09-11" );

????????????? dateElement.addAttribute( "type" , "Gregorian calendar" );

?????????? }

??????????

?????????? /** 修改內容之三 : 若 title 內容為 Dom4j Tutorials, 則刪除該節點 */

?????????? list = document.selectNodes( "/books/book" );

?????????? iter = list.iterator();

?????????? while (iter.hasNext()){

????????????? Element bookElement = (Element)iter.next();

????????????? Iterator iterator = bookElement.elementIterator( "title" );

?????????? ??? while (iterator.hasNext()){

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

????????????????? if (titleElement.getText().equals( "Dom4j Tutorials" )){

???????????????????? bookElement.remove(titleElement);

????????????????? }

????????????? }

?????????? } ?????????

??????????

?????????? try {

????????????? /** 將 document 中的內容寫入文件中 */

????????????? XMLWriter writer = new XMLWriter( new FileWriter( new File(newfilename)));

????????????? writer.write(document);

????????????? writer.close();

????????????? /** 執行成功 , 需返回 1 */

????????????? returnValue = 1;

?????????? } catch (Exception ex){

????????????? ex.printStackTrace();

?????????? }

??????????

?????? } catch (Exception ex){

?????????? ex.printStackTrace();

?????? }

?????? return returnValue;

??? }

???

?

???

??? /**

??? ? * 格式化 XML 文檔 , 并解決中文問題

??? ? * @param filename

??? ? * @return

??? ? */

??? public int formatXMLFile(String filename){

?????? int returnValue = 0;

?????? try {

?????????? SAXReader saxReader = new SAXReader();

?????????? Document document = saxReader.read( new File(filename));

?????????? XMLWriter writer = null ;

?????????? /** 格式化輸出 , 類型 IE 瀏覽一樣 */

?????????? OutputFormat format = OutputFormat.createPrettyPrint();

?????????? /** 指定 XML 編碼 */

?????????? format.setEncoding( "GBK" );

?????????? writer= new XMLWriter( new FileWriter( new File(filename)),format);

?????????? writer.write(document);

?????????? writer.close(); ?????

?????????? /** 執行成功 , 需返回 1 */

?????????? returnValue = 1; ????

?????? } catch (Exception ex){

?????????? ex.printStackTrace();

?????? }

?????? return returnValue;

??? }

Dom4jDemo.java

package com.holen.dom4j;

?

import java.io.File;

import java.io.FileWriter;

import java.util.Iterator;

import java.util.List;

?

import org.dom4j.Attribute;

import org.dom4j.Document;

import org.dom4j.DocumentHelper;

import org.dom4j.Element;

import org.dom4j.io.OutputFormat;

import org.dom4j.io.SAXReader;

import org.dom4j.io.XMLWriter;

?

/**

? * @author Holen Chen

? */

public class Dom4jDemo {

???

??? public Dom4jDemo() {

??? }

?

??? public int createXMLFile(String filename){ …}

??? public int ModiXMLFile(String filename,String newfilename){ …}

??? public int formatXMLFile(String filename){ …}

?

??? public static void main(String[] args) {

?????? Dom4jDemo temp = new Dom4jDemo();

?????? System.out.println(temp.createXMLFile( "d://holen.xml" )); ??? ??? System.out.println(temp.ModiXMLFile( "d://holen.xml" , "d://holen2.xml" ));

?????? System.out.println(temp.formatXMLFile( "d://holen2.xml" ));

??? }

}