Question

java中，怎么将一组数据写入xml文件中?

Answer 1

有很多种方法，用DOM或SAX, 还有JAXB等。下面给个DOM写的例子：

java使用DOM创建如下xml:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<root>
<name id="2">zs</name>
</root>

代码如下：

import java.io.File;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
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;
import org.w3c.dom.Text;

public class CreateXML {
public static void main(String[] args) throws Exception {
//实例化解析器
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
//创建Document对象
Document doc = builder.newDocument();

//创建XML文件所需的各种对象并序列化
Element root = doc.createElement("root");
Element name = doc.createElement("name");
Text nameText = doc.createTextNode("zs");

name.appendChild(nameText);
root.appendChild(name);
doc.appendChild(root);

name.setAttribute("id", "2");

doc2XmlFile(doc,"test.xml");

}

public static boolean doc2XmlFile(Document document, String filename) {
boolean flag = true;
try {
TransformerFactory tFactory = TransformerFactory.newInstance();
Transformer transformer = tFactory.newTransformer();
/** 编码 */
// transformer.setOutputProperty(OutputKeys.ENCODING, "GB2312");
DOMSource source = new DOMSource(document);
StreamResult result = new StreamResult(new File(filename));
transformer.transform(source, result);
} catch (Exception ex) {
flag = false;
ex.printStackTrace();
}
return flag;
}
}