From 5f20fc02cb6873ceabde9f34cf62967bbd92d82f Mon Sep 17 00:00:00 2001
From: peter <14100000001@qq.com>
Date: Sun, 11 Jan 2026 02:10:33 +0800
Subject: [PATCH] 签章
---
src/main/java/com/nq/service/impl/UserAgreementServiceImpl.java | 387 +++++++++++++++++++++++++++++++++++++++++-------------
1 files changed, 291 insertions(+), 96 deletions(-)
diff --git a/src/main/java/com/nq/service/impl/UserAgreementServiceImpl.java b/src/main/java/com/nq/service/impl/UserAgreementServiceImpl.java
index 7a78c5c..88a9f23 100644
--- a/src/main/java/com/nq/service/impl/UserAgreementServiceImpl.java
+++ b/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);
--
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