JAVA读取EMF文件并转化为PNG,JPG,GIF格式

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
 
import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JPanel;
 
import org.freehep.graphicsio.emf.EMFInputStream;
import org.freehep.graphicsio.emf.EMFRenderer;
/**
 * download the third-party libraries here:
 * http://java.freehep.org/vectorgraphics/index.html
 * 
 * @author gloomyfish
 *
 */
 
public class EMFReader {
  public static void main(String[] args) {
    try {
      EMFInputStream inputStream = new EMFInputStream(new FileInputStream("D:\\export.emf"), EMFInputStream.DEFAULT_VERSION);
      System.out.println("height = " + inputStream.readHeader().getBounds().getHeight());
      System.out.println("widht = " + inputStream.readHeader().getBounds().getWidth());
      
      // headerInfo of bitmap API always tell a lie, could not get 
      // correct width and height
      // BitmapInfoHeader headerInfo = new BitmapInfoHeader(inputStream);
      // System.out.println("Big Error on reading emf format picture");
      EMFRenderer emfRenderer = new EMFRenderer(inputStream);
      
      // create buffered image object from EMF render
        final int width = (int)inputStream.readHeader().getBounds().getWidth();
        final int height = (int)inputStream.readHeader().getBounds().getHeight();
        System.out.println("widht = " + width + " and height = " + height);
        final BufferedImage result = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        Graphics2D g2 = (Graphics2D)result.createGraphics();
        emfRenderer.paint(g2);
        
        // write it as png/jpg/gif, up to you!!!
        File outputfile = new File("D:\\result.png");
        ImageIO.write(result, "png", outputfile);
 
        // display it
        JPanel resultPanel = new JPanel() {
          /**
         * 
         */
        private static final long serialVersionUID = 1L;
 
        public void paintComponent(Graphics g) {
          super.paintChildren(g);
          Graphics2D g2 = (Graphics2D)g;
          g2.drawImage(result, 0, 0, width, height, null);
          }
        };
        JFrame ui = new JFrame("EMF Reader");
        ui.getContentPane().setLayout(new BorderLayout());
        ui.getContentPane().add(resultPanel, BorderLayout.CENTER);
        ui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        ui.setSize(new Dimension(width+20, height+40));
        ui.setVisible(true);
    } catch (FileNotFoundException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    }
  }
 
}