zoomimage.java

来自「疯狂Java讲义_源码(含Java设计模式CHM」· Java 代码 · 共 40 行

import javax.imageio.*;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;

/**
 * Description:
 * <br/>Copyright (C), 2005-2008, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee [e-mail]
 * @version  1.0
 */
public class ZoomImage
{
	//下面两个常量设置缩小后图片的大小
	private final int WIDTH = 80;
	private final int HEIGHT = 60;
	//定义个BuffedImage对象，用于保存缩小后的位图
	BufferedImage image = new BufferedImage(WIDTH , HEIGHT , 
		BufferedImage.TYPE_INT_RGB);
	Graphics g = image.getGraphics();
	public void zoom()throws Exception
	{
		//读取原始位图
		Image srcImage = ImageIO.read(new File("image/board.jpg"));
		//将原始位图缩小后绘制到image图象中
		g.drawImage(srcImage , 0 , 0 , WIDTH , HEIGHT , null);
		//将image图象文件输出到磁盘文件中。
		ImageIO.write(image , "jpeg" , 
			new File(System.currentTimeMillis() + ".jpg"));
	}
	public static void main(String[] args)throws Exception
	{
		new ZoomImage().zoom();
	}
}