一步一步教你用java生成二维码

this(image,

0, 0, image.getWidth(), image.getHeight());

} public

BufferedImageLuminanceSource(BufferedImage image, int left,

int top, int width, int height) {

super(width, height); int

sourceWidth = image.getWidth(); int

sourceHeight = image.getHeight();

if (left +

width > sourceWidth || top + height > sourceHeight) {

throw new

IllegalArgumentException( \

rectangle does not fit within image data.\ } for (int y =

top; y < top + height; y++) {

for (int x =

left; x < left + width; x++) { if

((image.getRGB(x, y) & 0xFF000000) == 0) {

image.setRGB(x, y, 0xFFFFFFFF); // = white }

} } this.image =

new BufferedImage(sourceWidth, sourceHeight,

BufferedImage.TYPE_BYTE_GRAY);

this.image.getGraphics().drawImage(image, 0, 0, null);

this.left = left;