dom4j 操作xml 常见方法2

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 作者 E-mail:
 * @version 创建时间：2009-7-29 上午09:11:51 类说明
 */
public class Dom4jXML {

	public Dom4jXML() {

	}

	/**
	 * 建立一个XML文档,文档名由输入属性决定
	 * 
	 * @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属性内容 */
		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属性的内容为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节点添加一个属性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", "Gregoriancalendar");
			}
			/** 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 writer = null;
			/** 格式化输出,类型IE浏览一样 */
			OutputFormat format = OutputFormat.createPrettyPrint();
			/** 指定XML编码 */
			format.setEncoding("GBK");
			writer = new XMLWriter(new FileWriter(new File(filename)), format);
			writer.write(document);
			writer.close();
			/** 执行成功,需返回1 */
			returnValue = 1;
		} catch (Exception ex) {
			ex.printStackTrace();
		}
		return returnValue;
	}

	public static void main(String[] args) {
		Dom4jXML temp = new Dom4jXML();
		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"));
	}
}