签章

peter

2026-01-11 5f20fc02cb6873ceabde9f34cf62967bbd92d82f

签章

 src/main/java/com/nq/service/impl/UserAgreementServiceImpl.java

@@ -31,6 +31,8 @@
import java.util.List;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.Color;
import java.awt.FontMetrics;
import com.nq.pojo.ContractImage;
import com.nq.dao.ContractImageMapper;
import com.alibaba.fastjson.JSON;
@@ -70,9 +72,9 @@

            String pdfFileName = "agreement_" + user.getId() + ".pdf";
            File pdfFile = new File(dir, pdfFileName);
            

            // 构建完整的PDF访问URL
            String pdfUrl = PropertiesUtil.getProperty("pdf.server.http.prefix") + "/agreement_" + user.getId() + ".pdf";
//            String pdfUrl = PropertiesUtil.getProperty("pdf.server.http.prefix") + "/agreement_" + user.getId() + ".pdf";

            // 如果PDF已存在，删除后重新生成，确保数据是最新的
            if (pdfFile.exists()) {
@@ -94,32 +96,36 @@

            // 将PDF转换为图片并返回图片路径数组
            List<String> imageUrls = convertPdfToImages(pdfFile, "contract", user.getId());
            

            return ServerResponse.createBySuccess(imageUrls);
        } catch (Exception e) {
            log.error("生成用户协议PDF失败", e);
            return ServerResponse.createByErrorMsg("生成PDF失败：" + e.getMessage());
        }
    }

    /**
     * 从PDF模板生成新的PDF，替换占位符
     */
    private void generatePdfFromTemplate(File templatePdf, File outputPdf, User user) throws Exception {
        log.info("开始生成PDF，模板路径: {}, 输出路径: {}, 用户: {}", 
        log.info("开始生成PDF，模板路径: {}, 输出路径: {}, 用户: {}",
                templatePdf.getAbsolutePath(), outputPdf.getAbsolutePath(), user.getId());
        

        PdfReader reader = null;
        PdfStamper stamper = null;
        FileOutputStream fos = null;
        

        try {
            reader = new PdfReader(new FileInputStream(templatePdf));
            fos = new FileOutputStream(outputPdf);
            stamper = new PdfStamper(reader, fos);

            // 设置中文字体
            BaseFont baseFont = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
            // 设置中文字体，使用EMBEDDED确保字体嵌入PDF，避免转图片时乱码
            // 使用itext-asian库提供的中文字体，必须使用EMBEDDED模式
            BaseFont baseFont = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.EMBEDDED);
            Font font = new Font(baseFont, 12, Font.NORMAL);

            log.info("中文字体已加载: {}", baseFont.getPostscriptFontName());

            SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日");
            String currentDate = sdf.format(new Date());
@@ -128,7 +134,7 @@
            String realName = user.getRealName() != null ? user.getRealName() : "";
            String idCard = user.getIdCard() != null ? user.getIdCard() : "";
            String address = user.getRegAddress() != null ? user.getRegAddress() : "";
            

            log.info("PDF生成数据 - 姓名: {}, 身份证: {}, 地址: {}", realName, idCard, address);

            // 获取PDF页数
@@ -154,7 +160,7 @@
            reader = null;
            fos.close();
            fos = null;
            

            // 验证生成的文件
            if (outputPdf.exists()) {
                long fileSize = outputPdf.length();
@@ -194,49 +200,157 @@
    }

    /**
     * 在PDF上替换占位符（使用文本覆盖方式）
     * 在PDF上替换占位符（使用透明背景图片方式）
     */
    private void replacePlaceholdersInPdf(PdfContentByte canvas, Rectangle pageSize, String pageText,
                                         String realName, String idCard, String address, 
                                         String currentDate, Font font,int pageNum) throws Exception {
        // 查找占位符在文本中的位置，然后估算在PDF中的坐标
        // 由于PDF坐标系统复杂，这里使用固定位置替换
        // 实际使用时需要根据PDF模板的具体布局调整坐标
                                          String realName, String idCard, String address,
                                          String currentDate, Font font,int pageNum) throws Exception {
        float margin = 50;
        float lineHeight = 14;
        float startY = pageSize.getHeight() - 194;
        float startY = pageSize.getHeight() - 204;

        if(pageNum == 1){
            replacePlaceholder(canvas, "", realName, margin + 75, startY, 0, font);
            // 生成透明背景的姓名图片并插入
            File nameImage = createTextImage(realName, font);
            insertImageToPdf(canvas, nameImage, margin + 75, startY);
            startY -= lineHeight;

            replacePlaceholder(canvas, "", address, margin + 75, startY-2, 0, font);
            // 生成透明背景的地址图片并插入
            File addressImage = createTextImage(address, font);
            insertImageToPdf(canvas, addressImage, margin + 75, startY-2);
            startY -= lineHeight;

            replacePlaceholder(canvas, "", idCard, margin + 95, startY-2, 0, font);
            // 生成透明背景的身份证号图片并插入
            File idCardImage = createTextImage(idCard, font);
            insertImageToPdf(canvas, idCardImage, margin + 95, startY-2);
        }
        if(pageNum == 3){
            replacePlaceholder(canvas, "", currentDate, margin + 60, startY+32, 0, font);
            replacePlaceholder(canvas, "", currentDate, margin + 60, startY, 0, font);
            // 生成透明背景的日期图片并插入
            File dateImage1 = createTextImage(currentDate, font);
            insertImageToPdf(canvas, dateImage1, margin + 60, startY+32);
            
            File dateImage2 = createTextImage(currentDate, font);
            insertImageToPdf(canvas, dateImage2, margin + 60, startY);
        }

    }

    /**
     * 替换单个占位符
     * 创建透明背景的文本图片
     */
    private void replacePlaceholder(PdfContentByte canvas, String placeholder, String value,
                                   float x, float y, float width, Font font) {
        // 添加白色背景覆盖占位符区域
        canvas.saveState();
        canvas.setColorFill(BaseColor.WHITE);
        canvas.rectangle(x - 5, y - 15, width, 20);
        canvas.fill();
        canvas.restoreState();
    private File createTextImage(String text, Font font) throws Exception {
        if (StringUtils.isBlank(text)) {
            text = "";
        }

        // 添加新文本
        ColumnText.showTextAligned(canvas, Element.ALIGN_LEFT,
                new Phrase(value, font), x, y, 0);
        // 创建临时文件
        String tempDir = PropertiesUtil.getProperty("loca.pdf.dir");
        File dir = new File(tempDir);
        if (!dir.exists()) {
            dir.mkdirs();
        }
        
        String tempFileName = "text_" + System.currentTimeMillis() + "_" + Thread.currentThread().getId() + ".png";
        File imageFile = new File(dir, tempFileName);

        // 创建透明背景的BufferedImage (TYPE_INT_ARGB 默认透明)
        BufferedImage image = new BufferedImage(500, 50, BufferedImage.TYPE_INT_ARGB);
        Graphics2D g2d = image.createGraphics();
        
        // 启用透明背景支持
        g2d.setComposite(java.awt.AlphaComposite.SrcOver);

        // 设置高质量渲染
        g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_HRGB);
        g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
        g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);

        // 设置字体和颜色
        try {
            java.awt.Font awtFont = new java.awt.Font("SimSun", java.awt.Font.PLAIN, 12);
            g2d.setFont(awtFont);
        } catch (Exception e) {
            log.warn("无法加载SimSun字体，使用默认字体", e);
            g2d.setFont(new java.awt.Font(java.awt.Font.SANS_SERIF, java.awt.Font.PLAIN, 12));
        }
        // 使用深黑色，RGB(0, 0, 0) 完全不透明
        g2d.setColor(new Color(0, 0, 0, 255));

        // 绘制文本
        FontMetrics fm = g2d.getFontMetrics();
        int textWidth = fm.stringWidth(text);
        int textHeight = fm.getHeight();
        
        // 调整图片大小以适应文本
        if (textWidth > 0 && textHeight > 0) {
            // TYPE_INT_ARGB 类型默认透明背景，不需要清除
            BufferedImage resizedImage = new BufferedImage(textWidth + 20, textHeight + 10, BufferedImage.TYPE_INT_ARGB);
            Graphics2D g2dResized = resizedImage.createGraphics();
            
            // 启用透明背景支持
            g2dResized.setComposite(java.awt.AlphaComposite.SrcOver);
            
            // 设置高质量渲染
            g2dResized.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
            g2dResized.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_HRGB);
            g2dResized.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
            g2dResized.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);
            
            // 设置字体
            try {
                java.awt.Font awtFont = new java.awt.Font("SimSun", java.awt.Font.PLAIN, 12);
                g2dResized.setFont(awtFont);
            } catch (Exception e) {
                g2dResized.setFont(new java.awt.Font(java.awt.Font.SANS_SERIF, java.awt.Font.PLAIN, 12));
            }
            // 使用深黑色，RGB(0, 0, 0) 完全不透明
            g2dResized.setColor(new Color(0, 0, 0, 255));
            
            // 绘制文本
            g2dResized.drawString(text, 10, textHeight);
            g2dResized.dispose();
            
            // 保存图片
            ImageIO.write(resizedImage, "PNG", imageFile);
            image = resizedImage;
        } else {
            // 如果文本为空，创建一个小的透明图片
            BufferedImage emptyImage = new BufferedImage(50, 20, BufferedImage.TYPE_INT_ARGB);
            ImageIO.write(emptyImage, "PNG", imageFile);
            image = emptyImage;
        }

        g2d.dispose();

        log.info("已创建透明背景文本图片: {}, 文本: {}", imageFile.getAbsolutePath(), text);
        return imageFile;
    }

    /**
     * 将图片插入到PDF指定位置
     */
    private void insertImageToPdf(PdfContentByte canvas, File imageFile, float x, float y) throws Exception {
        if (imageFile == null || !imageFile.exists()) {
            log.warn("图片文件不存在: {}", imageFile);
            return;
        }

        try {
            Image image = Image.getInstance(imageFile.getAbsolutePath());
            image.setAbsolutePosition(x, y);
            canvas.addImage(image);
            log.info("图片已插入到PDF，位置: ({}, {})", x, y);
            
            // 删除临时图片文件
            try {
                imageFile.delete();
            } catch (Exception e) {
                log.warn("删除临时图片文件失败: {}", imageFile.getAbsolutePath(), e);
            }
        } catch (Exception e) {
            log.error("插入图片到PDF失败: {}", imageFile.getAbsolutePath(), e);
            throw e;
        }
    }

    @Override
@@ -258,7 +372,7 @@
            }

            List<String> imageUrls = convertPdfToImages(pdfFile, "contract", user.getId());
            

            response.setContentType("application/json;charset=UTF-8");
            response.getWriter().write(JSON.toJSONString(ServerResponse.createBySuccess(imageUrls)));
            response.getWriter().flush();
@@ -294,23 +408,23 @@

            String signatureFileName = "signature_" + user.getId() + ".png";
            File signatureFileLocal = new File(dir, signatureFileName);
            

            signatureFile.transferTo(signatureFileLocal);
            

            log.info("用户{}的签名图片已保存: {}", user.getId(), signatureFileLocal.getAbsolutePath());
            

            String pdfDir = PropertiesUtil.getProperty("loca.pdf.dir");
            String pdfFileName = "agreement_" + user.getId() + ".pdf";
            File pdfFile = new File(pdfDir, pdfFileName);
            

            if (pdfFile.exists()) {
                addSignatureToPdf(pdfFile, signatureFileLocal, user);
                

                List<String> imageUrls = convertPdfToImages(pdfFile, "contract", user.getId());
                

                String imagePrefix = PropertiesUtil.getProperty("pdf.server.http.prefix");
                long timestamp = System.currentTimeMillis();
                

                for (int i = 0; i < imageUrls.size(); i++) {
                    String imageName;
                    if (i == 0) {
@@ -319,7 +433,7 @@
                        imageName = "contract_" + timestamp + "_" + (i + 1) + ".png";
                    }
                    String imagePath = imagePrefix + "/" + imageName;
                    

                    ContractImage contractImage = new ContractImage();
                    contractImage.setUserId(user.getId());
                    contractImage.setContractType("contract");
@@ -327,7 +441,7 @@
                    contractImage.setAddTime(new Date());
                    contractImageMapper.insert(contractImage);
                }
                

                iUserService.updateSignedContract(user.getId(), "Y");
            }
            return ServerResponse.createBySuccessMsg("签名保存成功");
@@ -346,12 +460,12 @@
        PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(tempPdf));

        int pageCount = reader.getNumberOfPages();
        

        // 在第三页插入签名图片
        if (pageCount >= 3) {
            PdfContentByte canvas = stamper.getOverContent(3);
            Rectangle pageSize = reader.getPageSize(3);
            

            // 添加签名图片
            if (signatureImage.exists()) {
                Image image = Image.getInstance(signatureImage.getAbsolutePath());
@@ -366,7 +480,7 @@

        stamper.close();
        reader.close();
        

        // 替换原PDF文件
        if (tempPdf.exists()) {
            pdfFile.delete();
@@ -396,7 +510,7 @@

            String pdfFileName = "contract_" + user.getId() + ".pdf";
            File pdfFile = new File(dir, pdfFileName);
            

            String pdfUrl = PropertiesUtil.getProperty("pdf.server.http.prefix") + "/contract_" + user.getId() + ".pdf";

            if (pdfFile.exists()) {
@@ -416,7 +530,7 @@

            // 将PDF转换为图片并返回图片路径数组
            List<String> imageUrls = convertPdfToImages(pdfFile, "agreement", user.getId());
            

            return ServerResponse.createBySuccess(imageUrls);
        } catch (Exception e) {
            log.error("生成用户合同PDF失败", e);
@@ -443,7 +557,7 @@
            }

            List<String> imageUrls = convertPdfToImages(pdfFile, "agreement", user.getId());
            

            response.setContentType("application/json;charset=UTF-8");
            response.getWriter().write(JSON.toJSONString(ServerResponse.createBySuccess(imageUrls)));
            response.getWriter().flush();
@@ -479,23 +593,23 @@

            String signatureFileName = "contract_signature_" + user.getId() + ".png";
            File signatureFileLocal = new File(dir, signatureFileName);
            

            signatureFile.transferTo(signatureFileLocal);
            

            log.info("用户{}的合同签名图片已保存: {}", user.getId(), signatureFileLocal.getAbsolutePath());
            

            String pdfDir = PropertiesUtil.getProperty("loca.pdf.dir");
            String pdfFileName = "contract_" + user.getId() + ".pdf";
            File pdfFile = new File(pdfDir, pdfFileName);
            

            if (pdfFile.exists()) {
                addSignatureToContractPdf(pdfFile, signatureFileLocal, user);
                

                List<String> imageUrls = convertPdfToImages(pdfFile, "agreement", user.getId());
                

                String imagePrefix = PropertiesUtil.getProperty("pdf.server.http.prefix");
                long timestamp = System.currentTimeMillis();
                

                for (int i = 0; i < imageUrls.size(); i++) {
                    String imageName;
                    if (i == 0) {
@@ -504,7 +618,7 @@
                        imageName = "agreement_" + timestamp + "_" + (i + 1) + ".png";
                    }
                    String imagePath = imagePrefix + "/" + imageName;
                    

                    ContractImage contractImage = new ContractImage();
                    contractImage.setUserId(user.getId());
                    contractImage.setContractType("agreement");
@@ -512,10 +626,10 @@
                    contractImage.setAddTime(new Date());
                    contractImageMapper.insert(contractImage);
                }
                

                iUserService.updateSignedAgreement(user.getId(), "Y");
            }
            

            return ServerResponse.createBySuccessMsg("签名保存成功");
        } catch (Exception e) {
            log.error("保存用户合同签名失败", e);
@@ -527,11 +641,12 @@
        PdfReader reader = new PdfReader(new FileInputStream(templatePdf));
        PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(outputPdf));

        BaseFont baseFont = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
        // 设置中文字体，使用EMBEDDED确保字体嵌入PDF，避免转图片时乱码
        BaseFont baseFont = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.EMBEDDED);
        Font font = new Font(baseFont, 12, Font.NORMAL);
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日");
        String currentDate = sdf.format(new Date());
        

        int pageCount = reader.getNumberOfPages();

        for (int pageNum = 1; pageNum <= pageCount; pageNum++) {
@@ -549,7 +664,9 @@
        float margin = 50;
        float startY = pageSize.getHeight() - 364;
        if(pageNum == 2){
            replacePlaceholder(canvas, "", currentDate, margin + 320, startY, 0, font);
            // 生成透明背景的日期图片并插入
            File dateImage = createTextImage(currentDate, font);
            insertImageToPdf(canvas, dateImage, margin + 320, startY);
        }
    }

@@ -559,11 +676,11 @@
        PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(tempPdf));

        int pageCount = reader.getNumberOfPages();
        

        if (pageCount >= 2) {
            PdfContentByte canvas = stamper.getOverContent(2);
            Rectangle pageSize = reader.getPageSize(2);
            

            if (signatureImage.exists()) {
                Image image = Image.getInstance(signatureImage.getAbsolutePath());
                image.scaleToFit(100, 100);
@@ -575,7 +692,7 @@

        stamper.close();
        reader.close();
        

        if (tempPdf.exists()) {
            pdfFile.delete();
            tempPdf.renameTo(pdfFile);
@@ -593,19 +710,19 @@
                log.error("PDF模板目录配置不存在: pdf.template.dir");
                return null;
            }
            

            File dir = new File(templateDir);
            if (!dir.exists()) {
                log.error("PDF模板目录不存在: {}", templateDir);
                return null;
            }
            

            File templateFile = new File(dir, templateFileName);
            if (!templateFile.exists()) {
                log.error("PDF模板文件不存在: {}", templateFile.getAbsolutePath());
                return null;
            }
            

            log.info("使用模板文件: {}", templateFile.getAbsolutePath());
            return templateFile;
        } catch (Exception e) {
@@ -614,44 +731,54 @@
        }
    }

    public static void main(String[] args) {
        try {
            String pdfDir = "D:/work/A-stock/agreement_pdf";
            String pdfFileName = "agreement_" + 19998 + ".pdf";
            File pdfFile = new File(pdfDir, pdfFileName);
            convertPdfToImages1(pdfFile,"agreement");
        }catch (Exception e){
            e.printStackTrace();
        }
    }
    /**
     * 将PDF转换为图片
     */
    private List<String> convertPdfToImages(File pdfFile, String contractType, Integer userId) throws Exception {
    public static void convertPdfToImages1(File pdfFile, String contractType) throws Exception {
        List<String> imageUrls = new ArrayList<>();
        String imagePrefix = PropertiesUtil.getProperty("pdf.server.http.prefix");
        String pdfDir = PropertiesUtil.getProperty("loca.pdf.dir");
        
        String imagePrefix = "http://localhost:8099";
        String pdfDir = "D:/work/A-stock/agreement_pdf";

        long timestamp = System.currentTimeMillis();
        PDDocument document = null;
        try {
            document = PDDocument.load(pdfFile);
            

            // 创建PDFRenderer，使用高质量渲染
            PDFRenderer pdfRenderer = new PDFRenderer(document);
            

            int pageCount = document.getNumberOfPages();
            log.info("PDF总页数: {}", pageCount);
            

            for (int page = 0; page < pageCount; page++) {
                // 使用RGB模式渲染，DPI设置为300确保文字清晰
                // ImageType.RGB可以更好地处理中文字体
                BufferedImage image = pdfRenderer.renderImageWithDPI(page, 300, ImageType.RGB);
                

                // 对图片进行优化处理，确保文字清晰
                BufferedImage optimizedImage = optimizeImage(image);
                
                BufferedImage optimizedImage = optimizeImage1(image);

                String imageFileName = contractType + "_" + timestamp + ".png";
                if (page > 0) {
                    imageFileName = contractType + "_" + timestamp + "_" + (page + 1) + ".png";
                }
                File imageFile = new File(pdfDir, imageFileName);
                

                ImageIO.write(optimizedImage, "png", imageFile);
                

                String imageUrl = imagePrefix + "/imgs/" + imageFileName;
                imageUrls.add(imageUrl);
                

                log.info("PDF第{}页已转换为图片: {}", page + 1, imageUrl);
            }
        } finally {
@@ -659,30 +786,98 @@
                document.close();
            }
        }
        
        return imageUrls;

//        return imageUrls;
    }
    
    /**
     * 优化图片，确保文字清晰
     */
    private BufferedImage optimizeImage(BufferedImage originalImage) {

    public static BufferedImage optimizeImage1(BufferedImage originalImage) {
        int width = originalImage.getWidth();
        int height = originalImage.getHeight();
        

        BufferedImage optimizedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        Graphics2D g2d = optimizedImage.createGraphics();
        

        // 设置高质量渲染
        g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
        g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
        g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
        g2d.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
        

        g2d.drawImage(originalImage, 0, 0, null);
        g2d.dispose();
        

        return optimizedImage;
    }
    /**
     * 将PDF转换为图片
     */
    private List<String> convertPdfToImages(File pdfFile, String contractType, Integer userId) throws Exception {
        List<String> imageUrls = new ArrayList<>();
        String imagePrefix = PropertiesUtil.getProperty("pdf.server.http.prefix");
        String pdfDir = PropertiesUtil.getProperty("loca.pdf.dir");

        long timestamp = System.currentTimeMillis();
        PDDocument document = null;
        try {
            document = PDDocument.load(pdfFile);

            // 创建PDFRenderer，使用高质量渲染
            PDFRenderer pdfRenderer = new PDFRenderer(document);

            int pageCount = document.getNumberOfPages();
            log.info("PDF总页数: {}", pageCount);

            for (int page = 0; page < pageCount; page++) {
                // 使用RGB模式渲染，DPI设置为300确保文字清晰
                // ImageType.RGB可以更好地处理中文字体
                BufferedImage image = pdfRenderer.renderImageWithDPI(page, 300, ImageType.RGB);

                // 对图片进行优化处理，确保文字清晰
                BufferedImage optimizedImage = optimizeImage(image);

                String imageFileName = contractType + "_" + timestamp + ".png";
                if (page > 0) {
                    imageFileName = contractType + "_" + timestamp + "_" + (page + 1) + ".png";
                }
                File imageFile = new File(pdfDir, imageFileName);

                ImageIO.write(optimizedImage, "png", imageFile);

                String imageUrl = imagePrefix + "/imgs/" + imageFileName;
                imageUrls.add(imageUrl);

                log.info("PDF第{}页已转换为图片: {}", page + 1, imageUrl);
            }
        } finally {
            if (document != null) {
                document.close();
            }
        }

        return imageUrls;
    }

    /**
     * 优化图片，确保文字清晰
     */
    private BufferedImage optimizeImage(BufferedImage originalImage) {
        int width = originalImage.getWidth();
        int height = originalImage.getHeight();

        BufferedImage optimizedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        Graphics2D g2d = optimizedImage.createGraphics();

        // 设置高质量渲染
        g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
        g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
        g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
        g2d.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);

        g2d.drawImage(originalImage, 0, 0, null);
        g2d.dispose();

        return optimizedImage;
    }

@@ -699,7 +894,7 @@
            for (ContractImage image : images) {
                imageUrls.add(image.getAddress());
            }
            

            return ServerResponse.createBySuccess(imageUrls);
        } catch (Exception e) {
            log.error("查询合同图片列表失败", e);
@@ -720,7 +915,7 @@
            for (ContractImage image : images) {
                imageUrls.add(image.getAddress());
            }
            

            return ServerResponse.createBySuccess(imageUrls);
        } catch (Exception e) {
            log.error("查询保密协议图片列表失败", e);

 src/main/java/com/nq/utils/PdfToImageUtil.java

New file
@@ -0,0 +1,136 @@
package com.nq.utils;

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.PDFRenderer;
import org.apache.pdfbox.rendering.ImageType;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.imageio.ImageIO;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.util.ArrayList;
import java.util.List;

/**
 * PDF转图片工具类
 */
public class PdfToImageUtil {
    private static final Logger log = LoggerFactory.getLogger(PdfToImageUtil.class);

    /**
     * 将PDF文件转换为图片
     * @param pdfFile PDF文件
     * @param outputDir 输出目录
     * @param imagePrefix 图片文件名前缀
     * @return 图片文件路径列表
     */
    public static List<String> convertPdfToImages(File pdfFile, String outputDir, String imagePrefix) {
        List<String> imagePaths = new ArrayList<>();
        PDDocument document = null;

        try {
            if (!pdfFile.exists()) {
                log.error("PDF文件不存在: {}", pdfFile.getAbsolutePath());
                return imagePaths;
            }

            // 确保输出目录存在
            File outputDirectory = new File(outputDir);
            if (!outputDirectory.exists()) {
                outputDirectory.mkdirs();
            }

            // 加载PDF文档
            document = PDDocument.load(new FileInputStream(pdfFile));
            PDFRenderer pdfRenderer = new PDFRenderer(document);

            int pageCount = document.getNumberOfPages();
            log.info("PDF总页数: {}", pageCount);

            long timestamp = System.currentTimeMillis();

            // 遍历每一页
            for (int page = 0; page < pageCount; page++) {
                // 使用RGB模式渲染，DPI设置为300确保文字清晰
                BufferedImage image = pdfRenderer.renderImageWithDPI(page, 300, ImageType.RGB);

                // 优化图片
                BufferedImage optimizedImage = optimizeImage(image);

                // 生成图片文件名
                String imageFileName;
                if (page == 0) {
                    imageFileName = imagePrefix + "_" + timestamp + ".png";
                } else {
                    imageFileName = imagePrefix + "_" + timestamp + "_" + (page + 1) + ".png";
                }

                File imageFile = new File(outputDirectory, imageFileName);

                // 保存图片
                ImageIO.write(optimizedImage, "png", imageFile);

                imagePaths.add(imageFile.getAbsolutePath());
                log.info("PDF第{}页已转换为图片: {}", page + 1, imageFile.getAbsolutePath());
            }

        } catch (Exception e) {
            log.error("PDF转图片失败: {}", pdfFile.getAbsolutePath(), e);
        } finally {
            if (document != null) {
                try {
                    document.close();
                } catch (Exception e) {
                    log.error("关闭PDF文档失败", e);
                }
            }
        }

        return imagePaths;
    }

    /**
     * 优化图片，确保文字清晰
     */
    private static BufferedImage optimizeImage(BufferedImage originalImage) {
        int width = originalImage.getWidth();
        int height = originalImage.getHeight();

        BufferedImage optimizedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        Graphics2D g2d = optimizedImage.createGraphics();

        // 设置高质量渲染
        g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
        g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
        g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
        g2d.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);

        g2d.drawImage(originalImage, 0, 0, null);
        g2d.dispose();

        return optimizedImage;
    }

    /**
     * 测试方法：将指定PDF转换为图片
     */
    public static void main(String[] args) {
        // 示例：转换agreement_19998.pdf
        String pdfPath = "D:/work/A-stock/agreement_pdf/agreement_19998.pdf";
        String outputDir = "D:/work/A-stock/agreement_pdf/";
        String imagePrefix = "agreement_19998";

        File pdfFile = new File(pdfPath);
        List<String> imagePaths = convertPdfToImages(pdfFile, outputDir, imagePrefix);

        System.out.println("转换完成，共生成 " + imagePaths.size() + " 张图片：");
        for (String path : imagePaths) {
            System.out.println("  - " + path);
        }
    }
}