XML 读取 写入 更新 Dom4J 操作

package cn.com.agree.fly.test;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;
/**
* XML基本读取写入(dom4j操作)
* @author 李海云
* @mail CloudComputing.cc@gmail.com
* @date 2012-01-11 14:25
*/
public class XMLReadWriter_Dom4J {
public static void main(String[] args) throws DocumentException, IOException {
writeXML("d:/product.xml");
readXML("d:/product.xml");
System.out.println("-----------");
modifyXML("d:/product.xml");
readXML("d:/product.xml");
}
public static void writeXML(String filePath) throws IOException {
Document document = DocumentHelper.createDocument();//创建xml文档对象
Element root = DocumentHelper.createElement("product");//创建根节点
document.setRootElement(root);//传入根目录
root.addAttribute("name","oracle");//添加根节点的属性
Element priceElement = root.addElement("price");//添加price标签元素
priceElement.setText("22.5");//设置元素值
Element descElement = root.addElement("desc");
descElement.setText("我是产品描述啊！");
descElement.addAttribute("title", "我是描述标题啊");//给元素设置属性
OutputFormat format = new OutputFormat("    ",true);//创建格式化模版对象
XMLWriter xmlWriter2 = new XMLWriter(new FileOutputStream(filePath),format);//创建xml写入器
xmlWriter2.write(document);//执行写入
xmlWriter2.flush();
xmlWriter2.close();
}
public static void readXML(String filePath) throws DocumentException, IOException {
File file = new File(filePath);
SAXReader saxReader = new SAXReader();//创建读取器
Document document = saxReader.read(file);//读取xml到document对象中
Element rootElement = document.getRootElement();//获得文档根目录
System.out.println(rootElement.getName());//读取根目录名称
System.out.println(rootElement.attributeValue("name"));//读取更目录属性
Element priceElement = rootElement.element("price");//获得标签为price的节点
System.out.println(priceElement.getText());//获取其值
}
private static void modifyXML(String filePath) throws IOException, DocumentException {
File file = new File(filePath);
SAXReader saxReader = new SAXReader();//创建读取器
Document document = saxReader.read(file);//读取xml到document对象中
Element rootElement = document.getRootElement();//获得文档根目录
rootElement.setName("user");
Attribute nameAttribute = rootElement.attribute("name");
nameAttribute.setText("haha");
Element priceElement = rootElement.element("price");//获得标签为price的节点
priceElement.setText("88.8");//修改值
Element descElement = rootElement.element("desc");
descElement.setText("我是描述2222222");
XMLWriter xmlWriter = new XMLWriter(new FileOutputStream(filePath));//创建写入器
xmlWriter.write(document);//写入最新document对象到文件中
xmlWriter.flush();
xmlWriter.close();
//		//查看是否更新成功
//		System.out.println(new SAXReader().read(new File(filePath)).getRootElement().element("price").getText());
}
}