JAVA读取EMF文件并转化为PNG,JPG,GIF格式主要思路：
使用EMFInputStream读取EMF文件，然后使用EMFRenderer对象将EMF绘制到创建
好的空白的BufferedImage里面。这样就把EMF图片转化为Java中的BufferedImage对
象，然后可以重新保存为Java 2D支持图像格式如PNG或者JPG等。
代码如下：
[java] view plaincopy
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.p_w_picpath.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import javax.p_w_picpathio.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:
* /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 p_w_picpath 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()；
}
}
}
