XML 文件的操作(一)

最近想学习一下XML读取的操作。我会把各种读取XML的方法写成程序。希望大家给点意见。XML文件

<?xml version="1.0" encoding="gb2312"?>

<?xml-stylesheet type="text/xsl" href="students.xsl"?>

<students>
    <student sn="01">
        <name>张三</name>
        <age>18</age>
    </student>

    <student sn="02">
        <name>李四</name>
        <age>20</age>
    </student>
</students>

<?xml version="1.0" encoding="gb2312"?>
<?xml-stylesheet type="text/xsl" href="students.xsl"?>
<students>
<student sn="01">
<name>张三</name>
<age>18</age>
</student>
<student sn="02">
<name>李四</name>
<age>20</age>
</student>
</students>

读取XML文件，使用的DOM

package com.ibm.xml;

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

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

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;

/**
 * DOM解析XML
 * 通过获取子节点方法
 * @author Administrator
 *
 */
public class DOMStudentsInfo {

    /**
     * @param args
     */
    public static void main(String[] args) {
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        System.out.println(dbf.getClass().getName());

        try {
            DocumentBuilder db=dbf.newDocumentBuilder();
            //读取文件
            Document doc=db.parse(new File("students.xml"));
            //获取子节点
            NodeList nl=doc.getElementsByTagName("student");
            int len=nl.getLength();
            //获取节点数
            System.out.println(len);
            for(int i=0;i<len;i++)
            {
                Element eltStu=(Element)nl.item(i);

                Node eltName=eltStu.getElementsByTagName("name").item(0);
                Node eltAge=eltStu.getElementsByTagName("age").item(0);

                String name=eltName.getFirstChild().getNodeValue();
                String age=eltAge.getFirstChild().getNodeValue();

                System.out.println("name: "+name);
                System.out.println("age: "+age);
                System.out.println("-------------------------");
            }
        } catch (ParserConfigurationException e) {
            e.printStackTrace();
        }catch (SAXException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

}