Java中把word转换成图片

谁践踏了优雅 2023-09-26 08:48 65阅读 0赞

[CSDN话题挑战赛第2期][CSDN_2]  
参赛话题：[学习笔记][Link 1]

*学习之路，长路漫漫，写学习笔记的过程就是把知识讲给自己听的过程。这个过程中，我们去记录思考的过程，便于日后复习，梳理自己的思路。学习之乐，独乐乐，不如众乐乐，把知识讲给更多的人听，何乐而不为呢?  
你可以从以下几个方面着手（不强制），或者根据自己对话题主题的理解创作，参考如下：*

package com.util;
     
    import java.awt.Color;
    import java.awt.Graphics2D;
    import java.awt.image.BufferedImage;
    import java.io.ByteArrayInputStream;
    import java.io.ByteArrayOutputStream;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.OutputStream;
    import java.util.ArrayList;
    import java.util.Date;
    import java.util.List;
    import javax.imageio.ImageIO;
    import javax.imageio.stream.ImageInputStream;
    import com.aspose.words.Document;
    import com.aspose.words.ImageSaveOptions;
    import com.aspose.words.SaveFormat;
     
     
    public class OfficeUtils {
     
        /**
         * 验证aspose.word组件是否授权：无授权的文件有水印标记
         * 需要使用（aspose-words-15.8.0-jdk16.jar），版本要对应。无水印
         * @return
         */
        public static boolean isWordLicense()
        {
            boolean result = false;
            try {
                String s = "<License><Data><Products><Product>Aspose.Total for Java</Product><Product>Aspose.Words for Java</Product></Products><EditionType>Enterprise</EditionType><SubscriptionExpiry>20991231</SubscriptionExpiry><LicenseExpiry>20991231</LicenseExpiry><SerialNumber>8bfe198c-7f0c-4ef8-8ff0-acc3237bf0d7</SerialNumber></Data><Signature>sNLLKGMUdF0r8O1kKilWAGdgfs2BvJb/2Xp8p5iuDVfZXmhppo+d0Ran1P9TKdjV4ABwAgKXxJ3jcQTqE/2IRfqwnPf8itN8aFZlV3TJPYeD3yWE7IT55Gz6EijUpC7aKeoohTb4w2fpox58wWoF3SNp6sK6jDfiAUGEHYJ9pjU=</Signature></License>";
                ByteArrayInputStream inputStream = new ByteArrayInputStream(s.getBytes());
                com.aspose.words.License license = new com.aspose.words.License();
                license.setLicense(inputStream);
                result = true;
            } catch (Exception e) {
                e.printStackTrace();
            }
            return result;
        }
     
        //outputStream转inputStream
        public static ByteArrayInputStream parse(OutputStream out) throws Exception
        {
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            baos = (ByteArrayOutputStream) out;
            ByteArrayInputStream swapStream = new ByteArrayInputStream(baos.toByteArray());
            return swapStream;
        }
     
        /**
         * word和txt文件转换图片
         * @param inputStream
         * @param
         * @return
         * @throws Exception
         */
        private static List<BufferedImage> wordToImg(InputStream inputStream) throws Exception
        {
            if (!isWordLicense())
            {
                return null;
            }
            try {
                Date start = new Date();
                Document doc = new Document(inputStream);
                ImageSaveOptions options = new ImageSaveOptions(SaveFormat.PNG);
                options.setPrettyFormat(true);
                options.setUseAntiAliasing(true);
                options.setUseHighQualityRendering(true);
                int pageCount = doc.getPageCount();
                //生成前pageCount张，这可以限制输出长图时的页数（方法入参可以传值pageNum）
               /*if (pageCount > pageNum) {
                   pageCount = pageNum;
               }*/
                List<BufferedImage> imageList = new ArrayList<BufferedImage>();
                for (int i = 0; i < pageCount; i++)
                {
                    OutputStream output = new ByteArrayOutputStream();
                    options.setPageIndex(i);
                    doc.save(output, options);
                    ImageInputStream imageInputStream = javax.imageio.ImageIO.createImageInputStream(parse(output));
                    imageList.add(javax.imageio.ImageIO.read(imageInputStream));
                }
                List<BufferedImage> imageList2 = new ArrayList<BufferedImage>();
                //这个重新生成新的图片是因为直接输出的图片底色为红色
                for(int j=0; j<imageList.size(); j++)
                {
                    // 生成新图片
                    BufferedImage destImage = imageList.get(j);
                    int w1 = destImage.getWidth();
                    int h1 = destImage.getHeight();
                    destImage = new BufferedImage(w1, h1, BufferedImage.TYPE_INT_RGB);
                    Graphics2D g2 = (Graphics2D) destImage.getGraphics();
                    g2.setBackground(Color.LIGHT_GRAY);
                    g2.clearRect(0, 0, w1, h1);
                    g2.setPaint(Color.RED);
                    // 从图片中读取RGB
                    int[] ImageArrayOne = new int[w1 * h1];
                    ImageArrayOne = imageList.get(j).getRGB(0, 0, w1, h1, ImageArrayOne, 0, w1); // 逐行扫描图像中各个像素的RGB到数组中
                    destImage.setRGB(0, 0, w1, h1, ImageArrayOne, 0, w1); // 设置上半部分或左半部分的RGB
                    imageList2.add(destImage);
                }
                Date end = new Date();
                long l=end.getTime()-start.getTime();
                long hour= l / (1000 * 60 * 60);
                long min=  (l-hour*(1000 * 60 * 60 ))/(1000* 60);
                long s= (l-hour*(1000 * 60 * 60 )-min*1000*60)/(1000);
                long ss= (l-hour*(1000 * 60 * 60 )-min*1000*60 -s*1000)/(1000/60);
                System.out.println("word转图片时间:"+min+"分"+s+"秒" + ss + "毫秒");//hour+"小时"+
                return imageList2;
            } catch (Exception e) {
                e.printStackTrace();
                throw e;
            }
        }
     
        /**
         * 合并任数量的图片成一张图片
         * @param isHorizontal true代表水平合并，fasle代表垂直合并
         * @param imgs 待合并的图片数组
         * @return
         * @throws IOException
         */
        public static BufferedImage mergeImage(boolean isHorizontal, List<BufferedImage> imgs) throws IOException
        {
            // 生成新图片
            BufferedImage destImage = null;
            // 计算新图片的长和高
            int allw = 0, allh = 0, allwMax = 0, allhMax = 0;
            // 获取总长、总宽、最长、最宽
            for (int i = 0; i < imgs.size(); i++)
            {
                BufferedImage img = imgs.get(i);
                allw += img.getWidth();
                if (imgs.size() != i + 1)
                {
                    allh += img.getHeight() + 5;
                } else {
                    allh += img.getHeight();
                }
                if (img.getWidth() > allwMax)
                {
                    allwMax = img.getWidth();
                }
                if (img.getHeight() > allhMax)
                {
                    allhMax = img.getHeight();
                }
            }
            // 创建新图片
            if (isHorizontal)
            {
                destImage = new BufferedImage(allw, allhMax, BufferedImage.TYPE_INT_RGB);
            } else {
                destImage = new BufferedImage(allwMax, allh, BufferedImage.TYPE_INT_RGB);
            }
            Graphics2D g2 = (Graphics2D) destImage.getGraphics();
            g2.setBackground(Color.LIGHT_GRAY);
            g2.clearRect(0, 0, allw, allh);
            g2.setPaint(Color.RED);
     
            // 合并所有子图片到新图片
            int wx = 0, wy = 0;
            for (int i = 0; i < imgs.size(); i++)
            {
                BufferedImage img = imgs.get(i);
                int w1 = img.getWidth();
                int h1 = img.getHeight();
                // 从图片中读取RGB
                int[] ImageArrayOne = new int[w1 * h1];
                ImageArrayOne = img.getRGB(0, 0, w1, h1, ImageArrayOne, 0, w1); // 逐行扫描图像中各个像素的RGB到数组中
                if (isHorizontal) { // 水平方向合并
                    destImage.setRGB(wx, 0, w1, h1, ImageArrayOne, 0, w1); // 设置上半部分或左半部分的RGB
                } else { // 垂直方向合并
                    destImage.setRGB(0, wy, w1, h1, ImageArrayOne, 0, w1); // 设置上半部分或左半部分的RGB
                }
                wx += w1;
                wy += h1 + 5;
            }
            return destImage;
        }
     
     
        // 测试工具类
        public static void main(String[] args)
        {
            //word转图片格式
            try {
                File file = new File("G:\\test\\test22.docx");
                InputStream inStream = new FileInputStream(file);
                List<BufferedImage> wordToImg = wordToImg(inStream);
                //for(int i=0; i<wordToImg.size(); i++){ //可以保存图片（每页保存为一张）
                //    ImageIO.write(wordToImg.get(i), "jpg", new File("G:\\test\\"+ i +".png")); //将其保存在C:/imageSort/targetPIC/下
                //}
                BufferedImage mergeImage = mergeImage(false, wordToImg);
                //保存图片（长图）
                ImageIO.write(mergeImage, "jpg", new File("G:\\test\\test.png"));
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
     
    }

[CSDN_2]: https://marketing.csdn.net/p/7b6697fd9dd3795a268d1a6f2fe75012
[Link 1]: https://activity.csdn.net/creatActivity?id=10213