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如何把awt或者swing的UI生成一個圖形文件

package demo;

import java.io.File;

import org.jfree.chart.JFreeChart;

import java.io.IOException;

import java.io.OutputStream;

import java.io.BufferedOutputStream;

import java.io.FileOutputStream;

import java.awt.image.BufferedImage;

import org.jfree.chart.encoders.ImageFormat;

import java.awt.Graphics2D;

import java.awt.*;

import org.jfree.chart.encoders.ImageEncoder;

import org.jfree.chart.encoders.ImageEncoderFactory;

import javax.swing.JFrame;

import javax.imageio.ImageIO;

public class ToImg {

public ToImg() {

}

/**

* Saves a chart to a file in JPEG format.

*

* @param file the file (<code>null</code> not permitted).

* @param quality the JPEG quality setting.

* @param chart the chart (<code>null</code> not permitted).

* @param width the image width.

* @param height the image height.

*

* @throws IOException if there are any I/O errors.

*/

public static void saveChartAsJPEG(File file,

float quality,

JFreeChart chart,

int width,

int height) throws IOException {

if (file == null) {

throw new IllegalArgumentException("Null 'file' argument.");

}

if (chart == null) {

throw new IllegalArgumentException("Null 'chart' argument.");

}

OutputStream out = new BufferedOutputStream(new FileOutputStream(file));

BufferedImage images = chart.createBufferedImage(width, height, null);

BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

Graphics2D g2 = image.createGraphics();

// draw(g2, new Rectangle2D.Double(0, 0, width, height), null, info);

g2.dispose();

writeBufferedImage(image, ImageFormat.JPEG, out, quality);

out.close();

}

public static void writeBufferedImage(BufferedImage image, String format,

OutputStream outputStream, float quality)

throws IOException {

ImageEncoder imageEncoder

= ImageEncoderFactory.newInstance(format, quality);

imageEncoder.encode(image, outputStream);

}

public static void main(String[] args) {

Robot robot = null;

try {

JFrame f = new Frame1();

f.setSize(500,600);

f.setVisible(true);

f.setDefaultCloseOperation(2);

BufferedImage image = new BufferedImage(500, 600, BufferedImage.TYPE_INT_RGB);

f.getContentPane().paint(image.getGraphics());

FileOutputStream out = new FileOutputStream("d:\\b.jpg");

ImageIO.write(image, "jpeg" , out);

out.close();

/**

抓圖

Robot robot = new java.awt.Robot();

BufferedImage image = robot.createScreenCapture(new Rectangle(100, 100));

ImageEncoder imageEncoder

= ImageEncoderFactory.newInstance(ImageFormat.JPEG, 100);

FileOutputStream out = new FileOutputStream("d:\\a.jpg");

imageEncoder.encode(taget, out);

}*/

}

catch (Exception ex) {

ex.printStackTrace();

}

posted on 2006-02-13 21:38 Vincent.Chen 閱讀(341) 評論(0) 編輯收藏所屬分類: Java

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