DOM4J解析XML文件1（有关写入中文的问题）
package com.holen.dom4j;
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import java.io.File;
import java.io.FileWriter;
import java.util.Iterator;
import java.util.List;
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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;
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/**
?* @author Holen Chen
?*/
public class Dom4jDemo {
???
??? public Dom4jDemo() {
??? }
???
??? /**
??? ?* 建立一个XML文档,文档名由输入参数决定
??? ?* @param filename 需建立的文件名
??? ?* @return 返回操作结果, 0表失败, 1表成功
??? ?*/
??? public int createXMLFile(String filename){
?????? /** 返回操作结果, 0表失败, 1表成功 */
?????? int returnValue = 0;
?????? /** 建立document对象 */
??? ??? Document document = DocumentHelper.createDocument();
?????? /** 建立XML文档的根books */
??? ??? Element booksElement = document.addElement("books");
?????? /** 加入一行注释 */
??? ??? booksElement.addComment("This is a test for dom4j, holen, 2004.9.11");
?????? /** 加入第一个book节点 */
??? ??? Element bookElement = booksElement.addElement("book");
?????? /** 加入show参数内容 */
??? ??? bookElement.addAttribute("show","yes");
?????? /** 加入title节点 */
??? ??? Element titleElement = bookElement.addElement("title");
?????? /** 为title设置内容 */
??? ??? titleElement.setText("Dom4j Tutorials");
??????
?????? /** 类似的完成后两个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节点 */
??? ??? Element ownerElement = booksElement.addElement("owner");
??? ??? ownerElement.setText("O'Reilly");
??????
?????? try{
?????? ??? /** 将document中的内容写入文件中 */
?????? ??? XMLWriter writer = new XMLWriter(new FileWriter(new File(filename)));
?????? ??? writer.write(document);
?????? ??? writer.close();
?????? ??? /** 执行成功,需返回1 */
?????? ??? returnValue = 1;
??? ??? }catch(Exception ex){
?????? ??? ex.printStackTrace();
?????? }
?????????? ???
??? ??? return returnValue;
??? }
???
??? /**
??? ?* 修改XML文件中内容,并另存为一个新文件
??? ?* 重点掌握dom4j中如何添加节点,修改节点,删除节点
??? ?* @param filename 修改对象文件
??? ?* @param newfilename 修改后另存为该文件
??? ?* @return 返回操作结果, 0表失败, 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));
?????? ??? /** 修改内容之一: 如果book节点中show参数的内容为yes,则修改成no */
?????? ??? /** 先用xpath查找对象 */
?????? ??? 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");
?????????? ??? }??
?????????? }
??????????
?????? ??? /**
?????????? ?* 修改内容之二: 把owner项内容改为Tshinghua
?????????? ?* 并在owner节点中加入date节点,date节点的内容为2004-09-11,还为date节点添加一个 参数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");
?????????? }
??????????
?????? ??? /** 修改内容之三: 若title内容为Dom4j Tutorials,则删除该节点 */
?????? ??? 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{
?????????? ??? /** 将document中的内容写入文件中 */
?????????? ??? XMLWriter writer = new XMLWriter(new FileWriter(new File(newfilename)));
?????????? ??? writer.write(document);
?????????? ??? writer.close();
?????????? ??? /** 执行成功,需返回1 */
?????????? ??? returnValue = 1;
?????? ??? }catch(Exception ex){
?????????? ??? ex.printStackTrace();
?????????? }
??????????
??? ??? }catch(Exception ex){
?????? ??? ex.printStackTrace();
?????? }
??? ??? return returnValue;
??? }
???
??? /**
??? ?* 格式化XML文档,并解决中文问题
??? ?* @param filename
??? ?* @return
??? ?*/
??? public int formatXMLFile(String filename){
?????? int returnValue = 0;
?????? try{
?????? ??? SAXReader saxReader = new SAXReader();???
?????? ??? Document document = saxReader.read(new File(filename));
?????? ??? XMLWriter output = null;
?????? ??? /** 格式化输出,类型IE浏览一样 */
?????? ??? OutputFormat format = OutputFormat.createPrettyPrint();
?????? ??? /** 指定XML字符集编码 */
?????? ??? format.setEncoding("GBK");
?????? ??? output = new XMLWriter(new FileWriter(new File(filename)),format);
?????? ??? output.write(document);
?????? ??? output.close();??? ???
?????? ??? /** 执行成功,需返回1 */
?????? ??? returnValue = 1;?? ???
??? ??? }catch(Exception ex){
?????? ??? ex.printStackTrace();
?????? }
??? ??? return returnValue;
??? }
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??? 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"));
??? }
}