利用Base64实现图片和XML格式的相互转换

package com.neusoft;

import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import javax.imageio.ImageIO;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

public class Test {
	public static void main(String[] args) {
		Test t = new Test();
		t.inputToXML();
		t.outToImage();
	}

	// 图片转换成XML
	public void inputToXML() {
		BASE64Encoder encoder = new BASE64Encoder();
		try {
			File f = new File("D:\\xml\\1.jpg");
			// System.out.println("5555");
			if (f.exists()) {

				FileInputStream fis = new FileInputStream(f);
				byte[] buffer = new byte[(int) f.length()];
				fis.read(buffer);
				String s_imageData = encoder.encode(buffer);
				Document doc = DocumentHelper.createDocument();
				Element root = doc.addElement("ImageList");
				Element imageID = root.addElement("imageID");
				Element imageInfo = root.addElement("imageInfo");
				Element imageSize = root.addElement("imageSize");
				Element imageData = root.addElement("imageData");
				imageID.addText("01");
				imageInfo.addText("图片1");
				imageSize.addText(String.valueOf(f.length()));
				imageData.addText(s_imageData);
				XMLWriter writer = new XMLWriter(new FileOutputStream("D:\\xml\\1.xml"));
				writer.write(doc);
				System.out.println("22");
				writer.flush();
				writer.close();
			} else {
				System.out.println("找不到要转换的图片文件！");
			}

		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}

	}

	// XML转成图片
	public void outToImage() {
		File f = new File("D:\\xml\\1.xml");
		SAXReader reader = new SAXReader();
		try {
			Document doc = reader.read(f);
			byte[] aa = doc.asXML().getBytes() ;
			System.out.println(new String(aa,"UTF-8"));
			
			Element root = doc.getRootElement();
			Element image = (Element) root.selectSingleNode("imageData");
			String s_data = image.getText();
			BASE64Decoder decoder = new BASE64Decoder();
			byte[] data = decoder.decodeBuffer(s_data);
			
			FileOutputStream fos = new FileOutputStream("D:\\xml\\71198.jpg");
			fos.write(data);
			fos.flush();
			fos.close();
			
		} catch (DocumentException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}

	}
}

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