XMLdom4j解析之XMLWriter及创建xml文档案例

package com.heilong.test;
/**
* deo4j解析
*/
import java.io.FileOutputStream;

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;


public class Demo{
	
	public static void main(String[] args) throws Exception {
	
		createDoc();
	}
	
	
	/**
	 * 修改xml内容：
	 * 		创建文档
	 * 		添加标签
	 * 		添加属性
	 * @throws Exception 
	 */
	public static void createDoc() throws Exception{
		
		//创建文档
		Document doc = DocumentHelper.createDocument();
		
		//添加标签
		Element contactList = doc.addElement("contactList");
		Element contact = contactList.addElement("contact");
		contact.addAttribute("id", "001");//为contact标签添加属性和属性值
		Element name = contact.addElement("name");
		name.setText("张三");
		
		Element age = contact.addElement("age");
		age.setText("25");
		
		Element phone = contact.addElement("phone");
		phone.setText("12032145753");
		
		Element email = contact.addElement("email");
		email.setText("zhangsan@qq.com");
		
		Element qq = contact.addElement("qq");
		qq.setText("769456248");
		
		write(doc);
	}
	
	
	/**
	 * 修改xml内容：
	 * 		修改属性值
	 * 		修改文本
	 * @throws Exception 
	 */
	public static void update() throws Exception{
		Document doc = new  SAXReader().read("./src/contact.xml");
		
		/**
		 * 修改属性值
		 */
		//方式一：利用标签对象修改属性值(修改第一个contact标签的id属性值)
		Element contactElt1 = (Element) doc.getRootElement().elements().get(0);
		Attribute idAtr1 = contactElt1.attribute("id");
		idAtr1.setValue("003");
	
		//方式二：添加重名属性覆盖
		Element contactElt2 = (Element) doc.getRootElement().elements().get(1);
		contactElt2.addAttribute("id","004");
		
		
		/**
		 * 修改文本
		 */
		//方式：利用文本对象修改文本
		Element ageElt = doc.getRootElement().element("contact").element("age");
		ageElt.setText("32");
		
		write(doc);
	}
	
	/**
	 * 修改xml内容:
	 * 		删除标签
	 * 		删除属性
	 * @throws Exception 
	 */
	public static void delete() throws Exception{
		Document doc = new  SAXReader().read("./src/contact.xml");
		
		/**
		 * 删除标签
		 */
		Element ageElt = doc.getRootElement().element("contact").element("age");
		//方式一：
		ageElt.detach();
		//方式二：
//		ageElt.getParent().remove(ageElt);
		
		
		/**
		 * 删除属性
		 * 删除第二个contact标签的id属性
		 */
		Element contactElt = (Element) doc.getRootElement().elements().get(1);
		Attribute idAttr = contactElt.attribute("id");
		idAttr.detach();
		
		write(doc);
		
	}
	
	
	/**
	 * 将XML文档写出
	 * @param doc
	 * @throws Exception
	 */
	public static void write(Document doc) throws Exception{
		FileOutputStream outputStream = new FileOutputStream("./src/contact_copy.xml");
		OutputFormat format = OutputFormat.createPrettyPrint();
		XMLWriter writer = new XMLWriter(outputStream,format);
		writer.write(doc);
		writer.close();
	}
}

标签：xml,Exception,XMLdom4j,doc,XMLWriter,Element,contact,import,throws
来源： https://blog.csdn.net/manzubaolong/article/details/113794909