package s0210xml文件的读取和创建;

import java.io.File;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Document;
import org.w3c.dom.Element;


public class CreatXML {

	public static void main(String[] args) {
		try {
			
			
			//这几行代码基本是固定的
			DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
			DocumentBuilder builder = factory.newDocumentBuilder();//通过工厂类创建一个builder
			Document document = builder.newDocument();             //用builder创建一个文件
			//这几行代码基本是固定的
			
			Element root = document.createElement("Languages");    //创建元素节点
			root.setAttribute("cat", "itt");                        //设置属性(属性名,属性值)
			
			//创建子节点lan1
			Element lan1 = document.createElement("lan");
			lan1.setAttribute("id", "1");
			Element name1 = document.createElement("name");
			name1.setTextContent("Java");
			Element ide1 = document.createElement("ide");		
			ide1.setTextContent("Eclipse");                   //setTextContent设置标签中间的文本内容
			lan1.appendChild(name1);                          //添加子节点
			lan1.appendChild(ide1);                           //添加子节点
			//创建子节点lan1
			
			//创建子节点lan1
			Element lan2 = document.createElement("lan");
			lan2.setAttribute("id", "2");
			Element name2 = document.createElement("name");
			name2.setTextContent("Swift");
			Element ide2 = document.createElement("ide");
			ide2.setTextContent("XCode");
			lan2.appendChild(name2);
			lan2.appendChild(ide2);
			//创建子节点lan1
			
			//创建子节点lan1
			Element lan3 = document.createElement("lan");
			lan3.setAttribute("id", "3");
			Element name3 = document.createElement("name");
			name3.setTextContent("C#");
			Element ide3 = document.createElement("ide");
			ide3.setTextContent("Visual Studio");
			lan3.appendChild(name3);
			lan3.appendChild(ide3);
			//创建子节点lan1
			
			//根节点添加子节点
			root.appendChild(lan1);
			root.appendChild(lan2);
			root.appendChild(lan3);
			document.appendChild(root);//很重要,要将根节点添加到document中
			//根节点添加子节点
			

			//这里是固定格式
			TransformerFactory transformerFactory = TransformerFactory.newInstance();
			Transformer transformer = transformerFactory.newTransformer();//作用,将xml文档转换为其他格式
			transformer.setOutputProperty("encoding", "UTF-8");
			//这里是固定格式
			
			
			//将xml文件保存为文件
			//new StreamResult(new File("newxml.xml")转换为文件,在工程目录中刷新,就会显示xml文件,然后按ctrl+i对xml文档格式化
			transformer.transform(new DOMSource(document), new StreamResult(new File("src/s0210xml文件的读取和创建/newxml.xml")));
			//将xml文件保存为文件                                              
			
		} catch (ParserConfigurationException e) {
			e.printStackTrace();
		} catch (TransformerConfigurationException e) {
			e.printStackTrace();
		} catch (TransformerException e) {
			e.printStackTrace();
		}
	}

}