文件盖章接口调整(解决横向排版的PDF坐标位置超出的情况)

ibps-comp-root/modules/comp-file-server/src/main/java/com/lc/ibps/cloud/file/util/PDFFileUtil.java

@@ -9,7 +9,9 @@ import org.apache.pdfbox.Loader;
 import org.apache.pdfbox.pdmodel.PDDocument;
 import org.apache.pdfbox.pdmodel.PDPage;
 import org.apache.pdfbox.pdmodel.PDPageContentStream;
+import org.apache.pdfbox.pdmodel.common.PDRectangle;
 import org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject;
+import org.apache.pdfbox.util.Matrix;
 import sun.misc.BASE64Decoder;
 
 import javax.swing.*;
@@ -144,13 +146,50 @@ public class PDFFileUtil {
             document.setAllSecurityToBeRemoved(true);
             byte[] imageBytes = Base64.getDecoder().decode(base64FileData);
             PDImageXObject image = PDImageXObject.createFromByteArray(document, imageBytes, "image");
-            // 获取图片的宽度和高度并存储在变量中
             float imageWidth = image.getWidth();
             float imageHeight = image.getHeight();
-            // 获取第一页并添加图片
+
             PDPage page = document.getPage(0);
+            PDRectangle mediaBox = page.getMediaBox();
+            float width = mediaBox.getWidth();
+            float height = mediaBox.getHeight();
+            int rotation = page.getRotation();
+
             PDPageContentStream contentStream = new PDPageContentStream(document, page, PDPageContentStream.AppendMode.APPEND, true);
-            contentStream.drawImage(image, 400, 750, imageWidth / 2, imageHeight / 2);
+            contentStream.saveGraphicsState(); // 保存当前图形状态
+
+            // 根据页面旋转角度调整坐标系  正常的PDF长宽841.0:595.0  横向排版的是反过来的，需要动态调整插入图片的坐标位置
+            switch (rotation) {
+                case 90:
+                    // 逆时针旋转90度，并平移到正确位置
+                    contentStream.transform(Matrix.getTranslateInstance(0, height));
+                    contentStream.transform(Matrix.getRotateInstance(Math.toRadians(-90), 0, 0));
+                    break;
+                case 180:
+                    contentStream.transform(Matrix.getTranslateInstance(width, height));
+                    contentStream.transform(Matrix.getRotateInstance(Math.toRadians(-180), 0, 0));
+                    break;
+                case 270:
+                    contentStream.transform(Matrix.getTranslateInstance(width, 0));
+                    contentStream.transform(Matrix.getRotateInstance(Math.toRadians(-270), 0, 0));
+                    break;
+                default:
+                    // 无旋转，无需调整
+                    break;
+            }
+
+            // 动态计算图片位置（右上角，边距10）
+            float margin = 10f;
+            float x = width - imageWidth - margin;
+            float y = height - imageHeight - margin;
+
+            // 确保坐标在页面范围内
+            x = Math.max(x, margin);
+            y = Math.max(y, margin);
+
+            contentStream.drawImage(image, x, y, imageWidth/2, imageHeight/2);
+            contentStream.restoreGraphicsState(); // 恢复图形状态
+
             contentStream.close();
             document.save(outputStream);
             document.close();