Java 如何截取圖片 ?

Author ???? :????? zhyiwww

E-Mail ????? :????? zhyiwww@163.com

Date ????????? :????? 2007-1-30

轉載請注明出處 www.aygfsteel.com/zhyiwww

??? ??? ??? ??? ??? ??? ??? ??? (copyright by @ zhangyi) ?

下面是我的一段代碼，實現如何截取圖片的：

? ?????? // 圖片源

?????? private static final String SRC_FILE="org//zy//demo//jdk//base//image//car1.jpg";

????? // 目標圖片

?????? private static final String DEST_FILE="c://a.jpg";

?

/**

?????? ?* 讀取圖像文件

?????? ?* 用 ImageReader

?????? ?* @param imgPath

?????? ?* @throws IOException

?????? ?*/

?????? public void readUsingImageReader(String imgPath) throws IOException{

?????????????

????????????? // 取得圖片讀入器

????????????? Iterator readers = ImageIO.getImageReadersByFormatName("jpg");

????????????? System.out.println(readers);

????????????? ImageReader reader = (ImageReader)readers.next();

????????????? System.out.println(reader);

?????????????

????????????? // 取得圖片讀入流

????????????? InputStream source=this.parseImagePath(ImageDemo.SRC_FILE);

????????????? ImageInputStream iis = ImageIO.createImageInputStream(source);

?????????????

????????????? reader.setInput(iis, true);

?????????????

????????????? // 圖片參數

?????????????

????????????? ImageReadParam param = reader.getDefaultReadParam();

????????????? int imageIndex = 0;

????????????? int half_width = reader.getWidth(imageIndex)/2;

????????????? int half_height = reader.getHeight(imageIndex)/2;

//??????????? Rectangle rect = new Rectangle(60, 60, half_width, half_height);

????????????? Rectangle rect = new Rectangle(60, 60, 100, 100);

?????????????

????????????? param.setSourceRegion(rect);

??????

????????????? BufferedImage bi = reader.read(0,param);?????????????

?????????????

????????????? ImageIO.write(bi, "jpg", this.initDestFile());??????????

?????????????

?????? }

?

我的源圖片是：

<!--[if !vml]-->
<!--[endif]-->

?

上面的程序運行后截得的圖片如下：

<!--[if !vml]-->
<!--[endif]-->

?