Java究竟能够处理图片到什么程度

拼搏现实的明天。 2023-02-21 04:46 22阅读 0赞

## **1、将图片圆角化处理** ##

**这是咱们要处理的图片**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNjg3ODA5_size_16_color_FFFFFF_t_70][]

public String roundCornerImage(){
            String fileInPath = "D:\\Frozen\\testFile\\image\\1.jpg";//图像源
            String fileOurPath = "D:\\Frozen\\testFile\\image\\2.png";//图像输出
            String type = "png";
            try {
                BufferedImage image = ImageIO.read(new File(fileInPath));
                int w = image.getWidth();
                int h = image.getHeight();
                BufferedImage output = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
                Graphics2D g2 = output.createGraphics();
                output = g2.getDeviceConfiguration().createCompatibleImage(w, h, Transparency.TRANSLUCENT);
                g2.dispose();
                g2 = output.createGraphics();
                //这里绘画原型图
                Ellipse2D.Double shape = new Ellipse2D.Double(0, 0,w, h);
                g2.setClip(shape);
                g2.drawImage(image, 0, 0, w, h, null);
                g2.dispose();
                ImageIO.write(output, type, new File(fileOurPath));
                return fileOurPath;
            }catch (Exception e){
                e.printStackTrace();
            }
            return null;
        }

效果

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNjg3ODA5_size_16_color_FFFFFF_t_70 1][]

## 2、图片添加水印 ##

public String textToImage(){
            String fileInPath = "D:\\Frozen\\testFile\\image\\1.jpg";//图像源
            String fileOutPath = "D:\\Frozen\\testFile\\image\\3.jpg";//图像输出
            String text = "明明你也很爱我，没理由爱不到结果！";//水印的内容
            String fontName = "华文行楷";//字体名称
            int fontStyle = Font.ITALIC;//字体样式：粗体Font.BOLD|斜体Font.ITALIC
            int fontSize = 36;//字体大小
            int x = 212;//x轴
            int y = 100;//y轴
            float tmd = 0.7f;//透明度：0.0 -- 1.0, 0.0为完全透明，1.0为完全不透明
            try {
                File file = new File(fileInPath);
                Image image = ImageIO.read(file);
                int width = image.getWidth(null);
                int height = image.getHeight(null);
                BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
                Graphics2D g = bufferedImage.createGraphics();
                g.drawImage(image,0,0, width, height, null);
                g.setFont(new Font(fontName, fontStyle, fontSize));
                g.setColor(Color.PINK);//awt颜色
                g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, tmd));
                //计算文字像素长度
                int textLength = text.length();
                int length = textLength;
                for (int i = 0; i < textLength; i++) {
                int wordLength = String.valueOf(text.charAt(i)).getBytes().length;
                   if(wordLength > 1){
                    length+=(wordLength-1);
                    }
                   }
                int width_wi = fontSize*(length%2==0 ? length/2:length/2+1);
                int height_wi = fontSize;
                int widthDiff = width-width_wi;
                int heightDiff = height-height_wi;
                if(x < 0){
                    x = widthDiff/2;
                }else if(x > widthDiff){
                    x=widthDiff;
                }
                if(y<0){
                    y = heightDiff/2;
                }else if(y > heightDiff){
                    y = heightDiff;
                }
                g.drawString(text, x, y + height_wi);//水印文件
                g.dispose();
                File fileo = new File(fileOutPath);
                ImageIO.write(bufferedImage, "JPEG", fileo);
            }catch (Exception e){
                e.printStackTrace();
            }
            return null;
        }

效果

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNjg3ODA5_size_16_color_FFFFFF_t_70 2][]

## 3、直接修改图片尺寸 ##

public String fixImageSize(){
            String fileIn = "D:\\Frozen\\testFile\\image\\1.jpg";
            String fileOut = "D:\\Frozen\\testFile\\image\\4.jpg";
            int width = 200;
            int height = 200;
            try {
                //把生成的圆形图片变换成宽高142x142的图片
                Thumbnails.of(fileIn).size(width, height).toFile(
                        fileOut);
            }catch (Exception e){
                e.printStackTrace();
            }
            return null;
        }

效果

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNjg3ODA5_size_16_color_FFFFFF_t_70 3][]

## 4、图片合并 ##

@GetMapping("/redant12")
        public String hbImage(){
            String file1 = "D:\\Frozen\\testFile\\image\\2.jpg";//图片2:被贴
            String file2 = "D:\\Frozen\\testFile\\image\\4.jpg";//图片4：贴图
            String fileOut = "D:\\Frozen\\testFile\\image\\5.jpg";//图片5：输出
            try {
               Thumbnails.of(file1).size(1280, 1024)
                       .watermark(Positions.TOP_LEFT,
                        ImageIO.read(new File(file2)), 1f)
                        .outputQuality(0.8f).toFile(fileOut);
            }catch (Exception e){
                e.printStackTrace();
            }
            return  null;
        }

效果

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNjg3ODA5_size_16_color_FFFFFF_t_70 4][]

## 5、图片旋转 ##

@GetMapping("/redant13")
        public String xzImage(){
            String fileIn = "D:\\Frozen\\testFile\\image\\1.jpg";
            String fileOu = "D:\\Frozen\\testFile\\image\\6.jpg";
            int width = 400;
            int height = 400;
            float xuanz = 85.5f;//正数：顺时针 负数：逆时针
            try {
                Thumbnails.of(fileIn).size(width, height).rotate(xuanz).toFile(fileOu);
            } catch (IOException e) {
                e.printStackTrace();
            }
            return null;
        }

效果

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNjg3ODA5_size_16_color_FFFFFF_t_70 5][]

**参考地址：http://rensanning.iteye.com/blog/1545708**

## 6、背景替换 ##

public String replaceBackImage(){
            String sourcePath = "D:\\Frozen\\testFile\\image\\back\\";
            File dir = new File(sourcePath);//要处理的图片目录
            File[] files = dir.listFiles();//列出目录中的图片，得到数组
            for(int x=0;x<files.length;x++){
                //定义一个RGB的数组，因为图片的RGB模式是由三个 0-255来表示的,比如白色就是(255,255,255)
                int[] rgb = new int[3];
                BufferedImage bi = null;
                try {
                    bi = ImageIO.read(files[x]);
                } catch (Exception e) {
                    e.printStackTrace();
                }
                //得到图片基本属性
                int width = bi.getWidth();
                int height = bi.getHeight();
                int minx = bi.getMinX();
                int miny = bi.getMinY();
                //按照长和宽遍历每一个像素，将像素上的颜色替换成目标颜色
                for (int i = minx; i < width; i++) {
                    for (int j = miny; j < height; j++) {
                        //获取当前像素的颜色
                        int pixel = bi.getRGB(i, j);
                        //分别得到 R G B
                        rgb[0] = (pixel & 0xff0000) >> 16;
                        rgb[1] = (pixel & 0xff00) >> 8;
                        rgb[2] = (pixel & 0xff);
                        /**
                         * 进行换色操作，我这里是要把蓝底换成粉红底，
                         * 那么就判断图片中rgb值是否在蓝色范围的像素
                         */
                        //进行颜色替换
                        //蓝色的取值范围我也不清楚，这里是用取色工具比较的值
                       if(rgb[0] < 10 && rgb[1] < 150&& rgb[1] > 50 && rgb[2] > 150){
                           bi.setRGB(i, j, 0xFFC0CB);
                       }
                    }
                }
                /**
                 * 将缓冲对象保存到新文件中
                 */
                try {
                    FileOutputStream ops = new FileOutputStream(new File(sourcePath+x+".jpg"));
                    ImageIO.write(bi,"jpg", ops);
                    ops.flush();
                    ops.close();
                }catch (Exception e){
                    e.printStackTrace();
                }
            }
            return null;
        }

效果

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNjg3ODA5_size_16_color_FFFFFF_t_70 6][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNjg3ODA5_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200628152245269.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNjg3ODA5,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNjg3ODA5_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200628152840889.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNjg3ODA5,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNjg3ODA5_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20200628161047431.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNjg3ODA5,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNjg3ODA5_size_16_color_FFFFFF_t_70 3]: https://img-blog.csdnimg.cn/20200628162858636.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNjg3ODA5,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNjg3ODA5_size_16_color_FFFFFF_t_70 4]: https://img-blog.csdnimg.cn/20200628164327514.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNjg3ODA5,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNjg3ODA5_size_16_color_FFFFFF_t_70 5]: https://img-blog.csdnimg.cn/202006281657514.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNjg3ODA5,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNjg3ODA5_size_16_color_FFFFFF_t_70 6]: https://img-blog.csdnimg.cn/20200628173536300.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNjg3ODA5,size_16,color_FFFFFF,t_70