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  • Java图片合并

    /**
      * 纵向合并图片,ossObject.getObjectContent()返回InputStream对象
      */
      private BufferedImage mergeImage(List<OSSObject> ossObjects){
        BufferedImage mergedImage = null;
        try {
          int totalHeight = 0;
          int maxWidth = 0;
          List<BufferedImage> imageList = new ArrayList<BufferedImage>();
          for(OSSObject ossObject:ossObjects){
            BufferedImage image = ImageIO.read(ossObject.getObjectContent());
            imageList.add(image);
            totalHeight+=image.getHeight();
            if(image.getWidth() > maxWidth){
              maxWidth = image.getWidth();
            }
          }
          mergedImage = new BufferedImage(maxWidth,totalHeight,BufferedImage.TYPE_3BYTE_BGR);
          for(int i=0;i<imageList.size();i++){
            for(int h=0;h<imageList.get(i).getHeight();h++){
              for(int w=0;w<imageList.get(i).getWidth();w++){
                if(i == 0){
                  mergedImage.setRGB(w,h,imageList.get(i).getRGB(w,h));
                }else{
                  int usedHeight = 0;
                  int currentImageIndex = i;
                  while((currentImageIndex-1) >= 0){
                    usedHeight += imageList.get(currentImageIndex-1).getHeight();
                    currentImageIndex--;
                  }
                  mergedImage.setRGB(w,h+usedHeight,imageList.get(i).getRGB(w,h));
                }
              }
            }
          }
          //ImageIO.write(mergedImage,IMAGE_FORMAT,new File("C:\file\merged2.png"));
        } catch (IOException e) {
          e.printStackTrace();
        }
        return mergedImage;
      }
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  • 原文地址:https://www.cnblogs.com/lzmrex/p/9644442.html
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