Java xmlの読み取り、作成(dom方式)

インタフェースの作成
XmlInterface.java

public interface XmlInterface {



		/** 

		*   XML   

		* @param fileName         

		*/ 

		public void createXml(String fileName); 

		/** 

		*   XML   

		* @param fileName         

		*/ 

		public void parserXml(String fileName); 

}

インタフェース実装
XmlImpl.java

package com.test.xml;



import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.PrintWriter;

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import javax.xml.parsers.ParserConfigurationException;

import javax.xml.transform.OutputKeys;

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.Document;

import org.w3c.dom.Element;

import org.w3c.dom.Node;

import org.w3c.dom.NodeList;

import org.xml.sax.SAXException;



public class XmlImpl implements XmlInterface{

	private Document document;



	public void init() {

		try {

			DocumentBuilderFactory factory = DocumentBuilderFactory

					.newInstance();

			DocumentBuilder builder = factory.newDocumentBuilder();

			this.document = builder.newDocument();

		} catch (ParserConfigurationException e) {

			System.out.println(e.getMessage());

		}

	}



	public void createXml(String fileName) {

		Element root = this.document.createElement("scores"); 

		this.document.appendChild(root); 

		Element employee = this.document.createElement("employee"); 

		Element name = this.document.createElement("name"); 

		name.appendChild(this.document.createTextNode("wangchenyang")); 

		employee.appendChild(name); 

		Element sex = this.document.createElement("sex"); 

		sex.appendChild(this.document.createTextNode("m")); 

		employee.appendChild(sex); 

		Element age = this.document.createElement("age"); 

		age.appendChild(this.document.createTextNode("26")); 

		employee.appendChild(age); 

		root.appendChild(employee); 

		TransformerFactory tf = TransformerFactory.newInstance();

		try {

			Transformer transformer = tf.newTransformer();

			DOMSource source = new DOMSource(document);

			transformer.setOutputProperty(OutputKeys.ENCODING, "gb2312");

			transformer.setOutputProperty(OutputKeys.INDENT, "yes");

			PrintWriter pw = new PrintWriter(new FileOutputStream(fileName));

			StreamResult result = new StreamResult(pw);

			transformer.transform(source, result);

			System.out.println("  XML    !");

		} catch (TransformerConfigurationException e) {

			System.out.println(e.getMessage());

		} catch (IllegalArgumentException e) {

			System.out.println(e.getMessage());

		} catch (FileNotFoundException e) {

			System.out.println(e.getMessage());

		} catch (TransformerException e) {

			System.out.println(e.getMessage());

		}

	}



	public void parserXml(String fileName) {

		try {

			DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();

			DocumentBuilder db = dbf.newDocumentBuilder();

			Document document = db.parse(fileName);

			

			NodeList employees = document.getChildNodes();

			for (int i = 0; i < employees.getLength(); i++) {

				Node employee = employees.item(i);

				NodeList employeeInfo = employee.getChildNodes();

				for (int j = 0; j < employeeInfo.getLength(); j++) {

					Node node = employeeInfo.item(j);

					NodeList employeeMeta = node.getChildNodes();

					for (int k = 0; k < employeeMeta.getLength(); k++) {

						System.out.println(employeeMeta.item(k).getNodeName()

								+ ":" + employeeMeta.item(k).getTextContent());

					}

				}

			}

			System.out.println("    ");

		} catch (FileNotFoundException e) {

			System.out.println(e.getMessage());

		} catch (ParserConfigurationException e) {

			System.out.println(e.getMessage());

		} catch (SAXException e) {

			System.out.println(e.getMessage());

		} catch (IOException e) {

			System.out.println(e.getMessage());

		}

	}

}

テスト

public class Main {



	public static void main(String args[]){

		XmlImpl dd=new XmlImpl();

		String str="D:/grade.xml";

		dd.init();

		dd.createXml(str);    //  xml

		dd.parserXml(str);    //  xml

	}

}

結果
xmlの生成

<?xml version="1.0" encoding="GB2312"?>
<scores>
<employee>
<name>wangchenyang</name>
<sex>m</sex>
<age>26</age>
</employee>
</scores>

xmlの読み込み

  XML    !

#text:



name:wangchenyang

#text:



sex:m

#text:



age:26

#text: