一、html转图片

引入依赖

implementation 'org.xhtmlrenderer:flying-saucer-core:9.1.22'

html页面转图片对于html标签格式有要求，自己调整，每个标签都要有结束标签，标签也要，标签也要， doctype需要大写

try {String basePath = "D:\\";File source = new File(basePath, "report.html");File g2drDest = new File(basePath, "G2DR.png");BufferedImage g2drImage = Graphics2DRenderer.renderToImageAutoSize(source.toURI().toURL().toExternalForm(),1024, BufferedImage.TYPE_INT_ARGB);ImageIO.write(g2drImage, "png", g2drDest);}catch (Exception e){e.printStackTrace();}

二、图片嵌入pdf

implementation 'com.itextpdf:itextpdf:5.5.5'
implementation 'com.itextpdf:itext-asian:5.2.0'

try{BufferedImage originalImage = ImageIO.read(new File("D:\\G2DR.png"));float imgWidth = originalImage.getWidth();float imgHeight = originalImage.getHeight();float pageWidth = PageSize.A4.getWidth();float pageHeight = PageSize.A4.getHeight();float imgPerPage = pageHeight; // 每页只显示图片的一段Document document = new Document(PageSize.A4, 0, 0, 0, 0);PdfWriter.getInstance(document, new FileOutputStream("D:\\output.pdf"));document.open();int totalImages = (int) Math.ceil(imgHeight / imgPerPage);//图片长宽和A4大小不匹配可能会导致图片剪切嵌入观感不好看，可自己微调页面和图片大小for (int i = 0; i < totalImages; i++) {// 计算剪切起点和宽度int start = (int) (imgPerPage * i);int end = (int) Math.min(start + imgPerPage, imgHeight);BufferedImage subImage = originalImage.getSubimage(0, start, (int)imgWidth, end-start);// 将剪切后的图片转换为iText可用的Image对象Image image = Image.getInstance(subImage, null);image.scaleToFit(pageWidth, pageHeight); // 调整图片大小以适应页面// 插入图片到PDF文档document.add(new Paragraph());document.add(image);// 添加页码，如果是最后一段不需要换页if (i != totalImages - 1) {document.newPage();}}document.close();}catch (Exception e){e.printStackTrace();}

三、图片嵌入word

最简单的嵌入

implementation 'org.apache.poi:poi:4.1.2'
implementation 'org.apache.poi:poi-ooxml:4.1.2'

try{BufferedImage originalImage = ImageIO.read(new File("D:\\G2DR.png"));XWPFDocument document=new XWPFDocument();XWPFParagraph paragraph=document.createParagraph();XWPFRun run=paragraph.createRun();//自己设置页面参数run.addPicture(new FileInputStream("D:\\G2DR.png"),XWPFDocument.PICTURE_TYPE_PNG,"1.png",Units.toEMU(originalImage.getWidth()*(PageSize.A4.getHeight()/ originalImage.getHeight())),Units.toEMU(PageSize.A4.getHeight()));OutputStream outputStream=new FileOutputStream("D:\\output.docx");document.write(outputStream);outputStream.close();}catch (Exception e){e.printStackTrace();}