import java.io.File;
import java.io.IOException;


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.junit.Test;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;


import com.sun.org.apache.xalan.internal.xsltc.cmdline.Transform;


public class demo1 {


	/**
	 * 用jaxp操作xml文件  增刪改查
	 * 
	 * @param args
	 * @throws ParserConfigurationException
	 * @throws IOException
	 * @throws SAXException
	 */
	public static void main(String[] args) throws ParserConfigurationException,
			SAXException, IOException {
		// 獲取工廠
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		// 產生解析器
		DocumentBuilder builder = factory.newDocumentBuilder();
		// 解析XML文件，
		Document document = builder.parse(new File("src/book.xml"));


		read(document);
	}
  // 讀取XML文件 ，得到售價節點
	public static void read(Document document) {
		NodeList list = document.getElementsByTagName("售價"); /* NodeList */
		Node price = list.item(0);
		String value = price.getTextContent(); // 獲取節點的值
		System.out.println(value);
	}
	
	// 更新XML文件中的值
	@Test
	public void update() throws ParserConfigurationException, SAXException,
			IOException, TransformerException {
		// 獲取工廠
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		// 產生解析器
		DocumentBuilder builder = factory.newDocumentBuilder();
		// 解析XML文件，
		Document document = builder.parse(new File("src/book.xml"));
		// 更新記憶體中的值
		NodeList list = document.getElementsByTagName("售價");
		Node price = list.item(0);
		price.setTextContent("110");
		// 將記憶體中的值寫入XML文件中
		TransformerFactory transform = TransformerFactory.newInstance();
		// 得到轉換器
		Transformer transformer = transform.newTransformer();
		transformer.transform(new DOMSource(document), new StreamResult(
				"src/book.xml"));
	}
	@Test
	public void add() throws ParserConfigurationException, SAXException,
			IOException, TransformerException {
		// 獲取工廠
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		// 產生解析器
		DocumentBuilder builder = factory.newDocumentBuilder();
		// 解析XML文件，
		Document document = builder.parse(new File("src/book.xml"));
		Node price = document.createElement("作者");
		price.setTextContent("張孝祥");


		// 得到父節點
		Node pranet = document.getElementsByTagName("書").item(0);
		pranet.appendChild(price);
		TransformerFactory tf=	TransformerFactory.newInstance();
	    Transformer ts=	tf.newTransformer();
	    ts.transform(new DOMSource(document), new StreamResult(new File("src/book.xml")));
	
	}
	//插向指定節點
	@Test
	public void add2() throws ParserConfigurationException, SAXException,
			IOException, TransformerException {
		// 獲取工廠
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		// 產生解析器
		DocumentBuilder builder = factory.newDocumentBuilder();
		// 解析XML文件，
		Document document = builder.parse(new File("src/book.xml"));
	
		Node price = document.createElement("路");
		price.setTextContent("路承陳");


		// 得到父節點
		Node pranet = document.getElementsByTagName("書").item(0);
		pranet.insertBefore(price, document.getElementsByTagName("售價").item(0));
		TransformerFactory tf = TransformerFactory.newInstance();
		Transformer ts = tf.newTransformer();
		ts.transform(new DOMSource(document), new StreamResult(new File("src/book.xml")));


}
	 @Test
	public void delete() throws ParserConfigurationException, SAXException, IOException, TransformerException{
		// 獲取工廠
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		// 產生解析器
		DocumentBuilder builder = factory.newDocumentBuilder();
		// 解析XML文件，
		Document document = builder.parse(new File("src/book.xml"));
		Node price =document.getElementsByTagName("售價").item(0);
		price.getParentNode().removeChild(price);
		TransformerFactory tf = TransformerFactory.newInstance();
		Transformer ts = tf.newTransformer();
		ts.transform(new DOMSource(document), new StreamResult(new File("src/book.xml")));


	}
	 //操作XML文件屬性*** 操作XML文件的元素時，一般都把元素當作node物件，但是發現node不好使時，轉換為Element
	 @Test
	 public void  updateAttribute() throws ParserConfigurationException, SAXException, IOException, TransformerException{
	// 獲取工廠
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		// 產生解析器
		DocumentBuilder builder = factory.newDocumentBuilder();
		// 解析XML文件，
		Document document = builder.parse(new File("src/book.xml"));
		//轉換為Element 
		Element book =(Element)document.getElementsByTagName("書").item(0);
	    book.setAttribute("name", "yyyy");
	   
		TransformerFactory tf = TransformerFactory.newInstance();
		Transformer ts = tf.newTransformer();
		ts.transform(new DOMSource(document), new StreamResult(new File("src/book.xml")));


	 
	 }
}