更改图片的大小

02

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import

java.awt.Image;

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import

java.awt.image.BufferedImage;

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import

java.io.File;

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import

java.io.FileOutputStream;

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import

java.io.IOException;

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import

javax.imageio.ImageIO;

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import

com.sun.image.codec.jpeg.JPEGCodec;

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import

com.sun.image.codec.jpeg.JPEGImageEncoder;

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public

class

JpgChange {

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// path 路径 ,旧文件名称 ,新文件名称,n 改变倍数

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public

void

changeImage(String path,String oldimg,String newimg,

int

n) {

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try

{

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File file =

new

File(path + oldimg);

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Image img = ImageIO.read(file);

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// 构造Image对象

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int

wideth = img.getWidth(

null

);

// 得到源图宽

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int

height = img.getHeight(

null

);

// 得到源图长

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BufferedImage tag =

new

BufferedImage(n * wideth,n * height,

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BufferedImage.TYPE_INT_RGB);

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tag.getGraphics().drawImage(img,

0

,

0

,n * wideth,n * height,

null

);

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FileOutputStream out =

new

FileOutputStream(path + newimg);

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JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);

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encoder.encode(tag);

// 近JPEG编码

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out.close();

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}

catch

(IOException e) {

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System.out.println(

"处理文件出现异常"

);

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e.printStackTrace();

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}

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}

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public

static

void

main(String[] args) {

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JpgChange jc =

new

JpgChange();

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jc.changeImage(

"E:\\"

,

"1.bmp"

,

"2.bmp"

,

3

);

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}

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}