From a6ae7c44fccca62e535c763aae0e599d2f3f73b0 Mon Sep 17 00:00:00 2001
From: zhaowenxuan <chacca165@163.com>
Date: 星期三, 29 五月 2024 14:27:53 +0800
Subject: [PATCH] 增加通过多个base64PDF合并为一个
---
ltkj-common/src/main/java/com/ltkj/common/utils/PDFDocumentUtil.java | 27 +++++++++++++++++++++++++++
1 files changed, 27 insertions(+), 0 deletions(-)
diff --git a/ltkj-common/src/main/java/com/ltkj/common/utils/PDFDocumentUtil.java b/ltkj-common/src/main/java/com/ltkj/common/utils/PDFDocumentUtil.java
index ee3d5a4..7bef253 100644
--- a/ltkj-common/src/main/java/com/ltkj/common/utils/PDFDocumentUtil.java
+++ b/ltkj-common/src/main/java/com/ltkj/common/utils/PDFDocumentUtil.java
@@ -7,9 +7,11 @@
import com.google.zxing.common.BitMatrix;
import com.itextpdf.text.*;
import com.itextpdf.text.pdf.*;
+import org.apache.commons.codec.binary.Base64;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
+import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.HashMap;
@@ -294,4 +296,29 @@
document.close();
return (ByteArrayOutputStream) map.get("stream");
}
+
+ /**
+ * 灏嗗涓猙ase64pdf鍚堝苟涓轰竴涓�
+ * @param base64PdfList pdf闆嗗悎
+ * @return
+ */
+ public static byte[] mergePDFs(List<String > base64PdfList) throws DocumentException, IOException {
+ ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
+ Document document = new Document();
+ PdfCopy copy = new PdfCopy(document, byteArrayOutputStream);
+ document.open();
+ for (String base64Pdf : base64PdfList) {
+ byte[] pdfBytes = Base64.decodeBase64(base64Pdf);
+ PdfReader reader = new PdfReader(new ByteArrayInputStream(pdfBytes));
+ int numberOfPages = reader.getNumberOfPages();
+ for (int i = 1; i <= numberOfPages; i++) {
+ document.newPage();
+ PdfImportedPage page = copy.getImportedPage(reader, i);
+ copy.addPage(page);
+ }
+ reader.close();
+ }
+ document.close();
+ return byteArrayOutputStream.toByteArray();
+ }
}
--
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