转载地址--java实现图片平铺倾斜水印效果_java_clh的博客-CSDN博客_java图片平铺
效果图：
public static void main(String[] args) throws IOException {File in = new File("图片路径+图片名称");File out = new File("图片路径+图片名称");addWaterMark(in,out,"水印文字");}
public static void addWaterMark(File inputFile, File outputFile, String text) throws IOException {
Image image = ImageIO.read(inputFile);
int imgWidth = image.getWidth(null);// 获取图片的宽
int imgHeight = image.getHeight(null);// 获取图片的高
int angel = 315;//旋转角度
int xpadding = 40;//每个水印水平间隔
int ypadding = 40;//每个水印垂直间隔
int fontSize = 10;
BufferedImage bi = new BufferedImage(imgWidth, imgHeight, BufferedImage.TYPE_INT_ARGB);
Graphics2D g = bi.createGraphics();
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
//绘制原图片
float alpha = 1F;
AlphaComposite ac = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, alpha);
g.setComposite(ac);
g.drawImage(image, 0, 0, imgWidth, imgHeight, null);
g.setBackground(Color.BLACK);
//开始绘制水印
//水印字体
Font font = new Font("微软雅黑", Font.BOLD, fontSize);
g.setFont(font);
FontRenderContext frc = g.getFontRenderContext();
TextLayout tl = new TextLayout(text, font, frc);
//水印串宽度
int stringWidth = g.getFontMetrics(g.getFont()).charsWidth(text.toCharArray(), 0, text.length());
//旋转水印
g.rotate(Math.toRadians(angel), (double) imgWidth / 2, (double) imgHeight / 2);
//水印透明度
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.5F));
// 字体色
g.setColor(Color.RED);
int x = -imgHeight / 2;
int y = -imgWidth / 2;
//循环绘制
while (x < imgWidth + imgHeight / 2) {
y = -imgWidth / 2;
while (y < imgHeight + imgWidth / 2) {
Shape sha = tl.getOutline(AffineTransform.getTranslateInstance(x, y));
g.fill(sha);
y += ypadding;
}
x += stringWidth + xpadding;
}
//释放资源
g.dispose();
ImageIO.write(bi, "PNG", outputFile);
}
