From 97135dfb25bb02d996eba5ceba948f35c439bcf1 Mon Sep 17 00:00:00 2001
From: aipper <aipper@qq.com>
Date: Mon, 27 Oct 2025 17:41:25 +0800
Subject: [PATCH] todo

---
 .../point/strategy/common/OfdToPdfUtil.java   | 97 +++++++++++++++++--
 1 file changed, 89 insertions(+), 8 deletions(-)

diff --git a/src/main/java/com/point/strategy/common/OfdToPdfUtil.java b/src/main/java/com/point/strategy/common/OfdToPdfUtil.java
index 6846fa5..d0f394f 100644
--- a/src/main/java/com/point/strategy/common/OfdToPdfUtil.java
+++ b/src/main/java/com/point/strategy/common/OfdToPdfUtil.java
@@ -1,28 +1,109 @@
 package com.point.strategy.common;
 
-import org.ofdrw.converter.ConvertHelper;
-import org.ofdrw.converter.export.PDFExporterPDFBox;
+import org.ofdrw.converter.export.ImageExporter;
+import org.ofdrw.reader.OFDReader;
+
+import javax.imageio.ImageIO;
+import java.awt.image.BufferedImage;
+import java.io.File;
+import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.util.List;
+import com.spire.pdf.PdfDocument;
+import com.spire.pdf.graphics.PdfImage;
 
 /**
  * OFD转PDF工具类
+ * 通过图片转换方式保留颜色信息
  */
 public class OfdToPdfUtil {
 
     /**
-     * ofd转pdf
+     * ofd转pdf - 使用高质量图片转换保留颜色
      * @param resourceFilePath OFD源文件地址
      * @param targetFilePath 需要输出PDF的目标地址
      */
     public static void ofdToPdf(String resourceFilePath, String targetFilePath){
         try {
-            // 按照OFD导出器的标准模式使用
-            ConvertHelper.toPdf(
-                    Paths.get(resourceFilePath),
-                    Paths.get(targetFilePath)
-            );
+            // 创建临时目录存放图片
+            Path ofdPath = Paths.get(resourceFilePath);
+            Path tempDir = Paths.get(new File(targetFilePath).getParent(), "temp_" + System.currentTimeMillis());
+            tempDir.toFile().mkdirs();
+            
+            // 使用高质量设置将OFD转换为PNG图片
+            try (OFDReader reader = new OFDReader(ofdPath)) {
+                ImageExporter exporter = new ImageExporter(ofdPath, tempDir, "PNG", 30.0);
+                exporter.export();
+                exporter.close();
+                
+                List<Path> imagePaths = exporter.getImgFilePaths();
+                if (imagePaths.isEmpty()) {
+                    throw new RuntimeException("未能从OFD文件中提取图片");
+                }
+                
+                // 将图片合并为PDF，保留颜色
+                imagesToPdf(imagePaths, targetFilePath);
+            }
+            
+            // 清理临时文件
+            deleteDirectory(tempDir.toFile());
+            
         } catch (Exception e) {
             throw new RuntimeException("OFD转PDF失败: " + e.getMessage(), e);
         }
     }
+
+    /**
+     * 将图片列表合并为PDF，保留原始颜色
+     */
+    private static void imagesToPdf(List<Path> imagePaths, String targetFilePath) {
+        try {
+            PdfDocument pdf = new PdfDocument();
+            
+            for (Path imagePath : imagePaths) {
+                // 使用Spire.PDF的PdfImage.fromFile方法直接从文件加载图片
+                com.spire.pdf.graphics.PdfImage image = com.spire.pdf.graphics.PdfImage.fromFile(imagePath.toString());
+                
+                if (image != null) {
+                    // 创建新页面，大小与图片相同
+                    com.spire.pdf.PdfPageBase page = pdf.getPages().add();
+                    
+                    // 计算图片适配页面的缩放比例
+                    double widthFitRate = image.getPhysicalDimension().getWidth() / page.getCanvas().getClientSize().getWidth();
+                    double heightFitRate = image.getPhysicalDimension().getHeight() / page.getCanvas().getClientSize().getHeight();
+                    float fitRate = Math.max((float)widthFitRate, (float)heightFitRate);
+                    
+                    // 计算适配后的尺寸
+                    double fitWidth = image.getPhysicalDimension().getWidth() / fitRate;
+                    double fitHeight = image.getPhysicalDimension().getHeight() / fitRate;
+                    
+                    // 将图片绘制到页面，保留原始颜色
+                    page.getCanvas().drawImage(image, 0, 30, fitWidth, fitHeight);
+                }
+            }
+            
+            pdf.saveToFile(targetFilePath);
+            pdf.close();
+            
+        } catch (Exception e) {
+            throw new RuntimeException("图片合并PDF失败: " + e.getMessage(), e);
+        }
+    }
+
+    /**
+     * 递归删除目录
+     */
+    private static void deleteDirectory(File directory) {
+        File[] files = directory.listFiles();
+        if (files != null) {
+            for (File file : files) {
+                if (file.isDirectory()) {
+                    deleteDirectory(file);
+                } else {
+                    file.delete();
+                }
+            }
+        }
+        directory.delete();
+    }
 }