/**
*
* @param width图片的宽度
*/
public void setWidth(int width) {
this.width = width;
}
/**
*
* @return图片类型
*/
public int getImageType() {
return imageType;
}
/**
*
* @param imageType图片类型
*/
public void setImageType(int imageType) {
this.imageType = imageType;
}
/**
*
* @return生成一张图片
*/
public ByteArrayInputStream buildImage() {
BufferedImage image = new BufferedImage(this.width, this.height, this.imageType);
Graphics g = image.getGraphics();
Graphics2D g2d = (Graphics2D) g;
g.setColor(this.getColor(200, 250));
g.fillRect(0, 0, this.width, this.height);
g.setFont(new Font("Times New Roman", Font.BOLD, 17));
g.setColor(this.getColor(180, 200));
/*
*绘制100条干扰线
*/
for (int i = 0; i < 100; i++) {
int x1 = random.nextInt(this.width);
int y1 = random.nextInt(this.height);
int x2 = random.nextInt(this.width - 3);
int y2 = random.nextInt(this.height - 3);
BasicStroke bs = new BasicStroke(2f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL);
Line2D line = new Line2D.Double(x1, y1, x2, y2);
g2d.setStroke(bs);
g2d.draw(line);
g.setColor(getColor(180, 222));
}
StringBuffer codeStr = new StringBuffer();
for (int i = 0; i < 4; i++) {
char c = character.charAt(random.nextInt(36));
codeStr.append(c);
Color color = new Color(20 + random.nextInt(110), 20 + random.nextInt(110), 20 + random.nextInt(110));
g.setColor(color); /*随机文字,旋转文字到指定角度*/
AffineTransform trans = new AffineTransform();
trans.rotate(random.nextInt(10) * i + 3, 5);
float scaleSize = random.nextFloat() + 0.5f;
if (scaleSize < 0.8 || scaleSize > 1.1f) {
scaleSize = 1f;
}
trans.scale(scaleSize, scaleSize); g2d.setTransform(trans);
g.drawString(String.valueOf(c), 15 * i + 6, 9);
}
this.checkCode = codeStr.toString(); g.dispose();
ByteArrayInputStream inputStream = null;
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
try {
ImageOutputStream imgOutput = ImageIO.createImageOutputStream(outputStream);
ImageIO.write(image, "JPEG", imgOutput);
imgOutput.close();
inputStream = new ByteArrayInputStream(outputStream.toByteArray());
outputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
return inputStream;
}
/**
* 利用随机数，随机生成一个Color颜色的对象
* @param fc
* @param bc
* @return颜色对象
*/
private Color getColor(int fc, int bc) {
if (fc > 255) {
fc = 255;
}
if (bc > 255) {
bc = 255;
}
int r = fc + random.nextInt(bc - fc);
int g = fc + random.nextInt(bc - fc);
int b = fc + random.nextInt(bc - fc);
return new Color(r, g, b);
}
}
责任编辑：小草
