通过dom创建一个xml文件

package com.domxmltest;

import java.io.File;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
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;

public class CreateXML {
public static void main(String[] args) {
Document doc;
//声明xml文档中的各个元素对象
Element students,student;
Element name=null;
Element address=null;
Element tel=null;
Element email=null;

try{
//得到dom解析器的工厂实例
DocumentBuilderFactory factory=DocumentBuilderFactory.newInstance();
//从dom工厂实例获得dom解析器
DocumentBuilder builder=factory.newDocumentBuilder();
//创建文档树模型对象
doc=builder.newDocument();
//如果创建的文档树模型不为空
if(null!=doc){
//创建students元素
students=doc.createElement(“students”);
//创建student元素
student=doc.createElement(“student”);
//设置student元素的属性id的值为95003
student.setAttribute(“id”, “95003″);
//将student元素添加为students的子元素
students.appendChild(student);
//创建name元素
name=doc.createElement(“name”);
//将一个文本结点添加为name元素的子结点
name.appendChild(doc.createTextNode(“Mr. Zhang”));
//将name元素添加为student的子元素
student.appendChild(name);
address=doc.createElement(“address”);
address.appendChild(doc.createTextNode(“Shangdong Qingdao”));
student.appendChild(address);
tel=doc.createElement(“tel”);
tel.appendChild(doc.createTextNode(“(0532)888888″));
student.appendChild(tel);
email=doc.createElement(“email”);
email.appendChild(doc.createTextNode(“xy21@xy21.info”));
student.appendChild(email);
//将students元素作为根元素添加到xml文档树中
doc.appendChild(students);
//将内存中的文档树保存为students.xml文档
Transformer transformer=TransformerFactory.newInstance().newTransformer();//得到转换器
//设置换行
transformer.setOutputProperty(OutputKeys.INDENT, “yes”);
//写入文件
transformer.transform(new DOMSource(doc), new StreamResult(new File(“d:/student.xml”)));
}
}catch (Exception e) {
e.printStackTrace();
}
}

}