Hỏi về thao tác trong XML file java?

[lolJ (null)]

em đang học thao tác về file xml trong java đến đoạn ghi vào file xml thì nó format như sau:

</SinhVien><SinhVien><hoten>Trinh Ha</hoten><ngaysinh>10 - 11 - 1994</ngaysinh><gioitinh>0</gioitinh><lop>cntt_2013</lop></SinhVien>

em muốn hỏi làm sao để nó format xuống dòng , em cảm ơn .Dưới đây là file write:

package test3;

import java.io.File;
import java.io.FileInputStream;
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.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.xml.sax.SAXException;

public class writeXML {

	public static void main(String[] args) throws ParserConfigurationException, TransformerException {
		DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
		DocumentBuilder docBuilder =docFactory.newDocumentBuilder();
		Document doc = docBuilder.newDocument();
		Element root;
		String filePath = "C:\\Users\\user\\Documents\\BaiTapJava\\testProject\\src\\test2\\SinhVien.xml";
		File xmlFile = new File(filePath);
		try {
			
			//neu file ton tai
			if(xmlFile.isFile()) {
				doc = docBuilder.parse(new FileInputStream(xmlFile));
				doc.getDocumentElement().normalize();
				root = doc.getDocumentElement();
			}
			else {
				root = doc.createElement("sinhviens"); // create roo
				doc.appendChild(root);
			}
			
			//create child
			Element sinhvien = doc.createElement("SinhVien");
			root.appendChild(sinhvien);
			
			//ho ten
			Element hoten = doc.createElement("hoten");
			hoten.appendChild(doc.createTextNode("Ha Nam"));
			sinhvien.appendChild(hoten);
		
			Element ngaysinh = doc.createElement("ngaysinh");
			ngaysinh.appendChild(doc.createTextNode("12 - 10 - 1994"));
			sinhvien.appendChild(ngaysinh);
			
			Element gioitinh = doc.createElement("gioitinh");
			gioitinh.appendChild(doc.createTextNode("1"));
			sinhvien.appendChild(gioitinh);
			
			Element lop = doc.createElement("lop");
			lop.appendChild(doc.createTextNode("cntt_2013"));
			sinhvien.appendChild(lop);
				//write the content into xml file
		} catch (SAXException | IOException e) {
			e.printStackTrace();
		}
		 TransformerFactory transFactory = TransformerFactory.newInstance();
		 Transformer trans = transFactory.newTransformer();
		 DOMSource source = new DOMSource(doc);
		 StreamResult kq = new StreamResult(xmlFile);
		 trans.transform(source, kq);
		 System.out.println("File saved");
	}

}

[anon12276517]

Bạn thử dùng link này xem:

Create XML file with linebreaks

[lolJ (null)]

thank bạn nha tuy nó không đẹp lắm nhưng dễ nhìn hơn hẳn