Add a logo to the upper left corner of the picture, add time and address to the lower left corner, and wrap the line when the address reaches the specified length

效果

1.Add to photoslogo水印

(1)添加pom依赖

<dependency>
	<groupId>net.coobird</groupId>
	<artifactId>thumbnailator</artifactId>
	<version>0.4.8</version>
</dependency>

 /** * Add to photosLogo水印 * @param projectPath 项目路径 * @param finalImageWater Add the watermark background image storage address * @throws Exception */
    private void addWaterLogoImage(String projectPath, String finalImageWater) throws Exception{
    
        //读取原图,获取宽高
        File file = new File(projectPath + "/WEB-INF/template/image.jpg");
        BufferedImage image = ImageIO.read(file);
        //Read the watermark image
        BufferedImage waterImg = ImageIO.read(new File(projectPath + "/WEB-INF/template/雨虹logo.jpg"));
        double bl = 0.18;//The watermark is the proportion of the original image width
        //Calculate the new watermark width and height according to the scale
        int waterWidth = (int) (image.getWidth() * bl);
        int waterHeight = waterWidth * waterImg.getHeight() / waterImg.getWidth();
        waterImg = Thumbnails.of(waterImg).size(waterWidth, waterHeight).keepAspectRatio(false).asBufferedImage();
        //Use the new watermark to perform adding a watermark Positions.TOP_LEFT 将logo放到左上角
        Thumbnails.of(file).watermark(Positions.TOP_LEFT, waterImg, 1f).scale(1).toFile(finalImageWater);
    }

2.Add time to photos、Address watermark and implement line wrapping effect when the address is too long

/** * 添加时间、Address watermark * @param finalImageWater */
    private void addWaterFontImage(String finalImageWater, String address) {
    
        try {
    
            String waterFont = "时 间："+ DateUtil.format(new Date(), "yyyy-MM-dd HH:mm:ss");
            address = "地 址:"+address;
            // 读取原图片信息
            File srcImgFile = new File(finalImageWater);
            Image srcImg = ImageIO.read(srcImgFile);
            int srcImgWidth = srcImg.getWidth(null);
            int srcImgHeight = srcImg.getHeight(null);

            // 初始化画布,图片多大,How big is the canvas
            BufferedImage bufImg = new BufferedImage(srcImgWidth, srcImgHeight, BufferedImage.TYPE_INT_RGB);
            Graphics2D g = bufImg.createGraphics();
            //指定要绘制的图片
            g.drawImage(srcImg, 0, 0, srcImgWidth, srcImgHeight, null);
            double fontLength = srcImgWidth * 0.3;//Set the length of the text according to the proportion,That is, the text length
            int fontSize = (int) (fontLength / 5 * 0.6);//文字大小,0.9为差值
            //设置字体样式,加粗,大小
            Font font = new Font("黑体", Font.BOLD, fontSize);
            //设置文字颜色
            g.setColor(Color.white);
            g.setFont(font);
            //The horizontal and vertical coordinates of the drawn text
            /** * 控制换行 */
            ArrayList<String> line_list = new ArrayList<>();
            FontRenderContext frc = g.getFontRenderContext();
            g.getFontRenderContext();
            Rectangle2D stringBounds = font.getStringBounds(address, frc);
            double fontWidth = stringBounds.getWidth();
            if(fontWidth <= bufImg.getWidth()){
    
                line_list.add(address);
            }else {
    
                int text_width = bufImg.getWidth()-60;// Output text width, Here, the canvas width is used as the text width test
                double bs =  fontWidth/text_width ;// The text length is a multiple of the text box length
                int line_char_count = (int)Math.ceil(address.length() / bs) ;// Approximate number of words per line
                int begin_index = 0 ;
                while(begin_index <address.length()){
    
                    int end_index = begin_index + line_char_count ;
                    if(end_index>= address.length()){
    
                        end_index = address.length();
                    }
                    String line_str = address.substring(begin_index, end_index);
                    Rectangle2D tempStringBounds = font.getStringBounds(line_str, frc);
                    int tzcs = 0 ;// 调整次数
                    int tzzs = 1 ;// Adjust word count, When the string length of the temporary text is greater than the required text width, Decrease the word count of the temporary text each time, Then re-measure the text width
                    while(tempStringBounds.getWidth()> text_width){
    
                        line_str = line_str.substring(0, line_str.length() - tzzs );// 每次向前 tzzs characters are recalculated (待优化)
                        tempStringBounds = font.getStringBounds(line_str, frc);
                        tzcs++;
                    }
                    System.out.println("调整"+(end_index - begin_index -line_str.length())+"个数字, 调整了"+tzcs+"次, Current line width:"+tempStringBounds.getWidth());
                    line_list.add(line_str);
                    begin_index = begin_index + line_str.length()  ;
                }
            }
            int gao = 0;
            if(srcImgHeight > srcImgWidth){
    
                gao = 90;
            }else{
    
                gao = 100;
            }
            for(int i = 0;i<line_list.size();i++){
    
                if(i == 0){
    
                    //Draw time watermark
                    g.drawString(waterFont, 20, (i+(srcImgHeight/gao))*80);
                }
                String line_str = line_list.get(i);
                //Draws an address watermark
                g.drawString(line_str, 20, (i+1+(srcImgHeight/gao))*80);//35 为每行的高度
            }
            g.dispose();
            // 输出图片
            Thumbnails.of(srcImgFile).watermark(Positions.BOTTOM_LEFT, bufImg, 1f).scale(1).toFile(finalImageWater);
        }catch (Exception e){
    
            e.printStackTrace();
        }
    }