From d734432a8bbbf863dc3de305f56e831c56ac767a Mon Sep 17 00:00:00 2001
From: inleft <inleft@qq.com>
Date: Tue, 15 Feb 2022 14:53:47 +0800
Subject: [PATCH] pdf 切割合并demo
---
snowy-main/src/main/java/vip/xiaonuo/modular/blogarticle/PdfUtils.java | 92 ++++++++++++++++++++++++++++++++++++++++++++++
snowy-main/pom.xml | 10 +++++
2 files changed, 102 insertions(+), 0 deletions(-)
diff --git a/snowy-main/pom.xml b/snowy-main/pom.xml
index edcbd78..1557809 100644
--- a/snowy-main/pom.xml
+++ b/snowy-main/pom.xml
@@ -36,6 +36,16 @@
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
+
+ <!-- https://mvnrepository.com/artifact/com.itextpdf/itextpdf -->
+ <dependency>
+ <groupId>com.itextpdf</groupId>
+ <artifactId>itextpdf</artifactId>
+ <version>5.5.13.2</version>
+ </dependency>
+
+
+
</dependencies>
<build>
diff --git a/snowy-main/src/main/java/vip/xiaonuo/modular/blogarticle/PdfUtils.java b/snowy-main/src/main/java/vip/xiaonuo/modular/blogarticle/PdfUtils.java
new file mode 100644
index 0000000..34c0df8
--- /dev/null
+++ b/snowy-main/src/main/java/vip/xiaonuo/modular/blogarticle/PdfUtils.java
@@ -0,0 +1,92 @@
+package vip.xiaonuo.modular.blogarticle;
+
+import com.itextpdf.text.Document;
+import com.itextpdf.text.DocumentException;
+import com.itextpdf.text.pdf.PdfCopy;
+import com.itextpdf.text.pdf.PdfImportedPage;
+import com.itextpdf.text.pdf.PdfReader;
+
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.util.List;
+
+/**
+ * pdf 切割合并demo
+ */
+public class PdfUtils {
+
+ public static void main(String args[]) throws IOException, DocumentException {
+ try {
+ //抽取页面
+
+ splitPDF("D:\\inleft\\Redis开发与运维(付磊).pdf", "D:\\inleft\\redis-split-1.pdf",
+ 28, 59);
+
+// splitPDF("D:\\桌面\\翻译任务\\IEC-61158-2-2003.pdf", "D:\\桌面\\翻译任务\\output1.pdf",
+// 231, 243);
+// splitPDF("D:\\桌面\\翻译任务\\IEC-61158-2-2003.pdf", "D:\\桌面\\翻译任务\\output2.pdf",
+// 260, 261);
+// //合并页面
+// String[] files = {"C:\\Users\\Administrator\\Desktop\\毕业设计.pdf", "C:\\Users\\Administrator\\Desktop\\毕业论文中期检查表.pdf"};
+// String savepath = "C:\\Users\\Administrator\\Desktop\\K.pdf";
+// mergePdfFiles(Arrays.asList(files), savepath);
+ } catch (Exception e) {
+ e.printStackTrace();
+ }
+
+ }
+
+ /**
+ * 合并原pdf为新文件
+ *
+ * @param files pdf绝对路径集
+ * @param newfile 新pdf绝对路径
+ * @return
+ * @throws IOException
+ * @throws DocumentException
+ */
+ public static void mergePdfFiles(List<String> files, String newfile) throws IOException, DocumentException {
+ Document document = new Document(new PdfReader(files.get(0)).getPageSize(1));
+ PdfCopy copy = new PdfCopy(document, new FileOutputStream(newfile));
+ document.open();
+ for (int i = 0; i < files.size(); i++) {
+ PdfReader reader = new PdfReader(files.get(i));
+ int n = reader.getNumberOfPages();
+ for (int j = 1; j <= n; j++) {
+ document.newPage();
+ PdfImportedPage page = copy.getImportedPage(reader, j);
+ copy.addPage(page);
+ }
+ }
+ document.close();
+ }
+
+ public static void splitPDF(String bytes, String newFile, int start, int end) {
+ Document document = null;
+ PdfCopy copy = null;
+ try {
+ //源读取
+ PdfReader reader = new PdfReader(bytes);
+ //获取pdf页数
+ int n = reader.getNumberOfPages();
+ if (end == 0) {
+ end = n;
+ }
+
+ document = new Document(reader.getPageSize(1));//读取源第一页
+ copy = new PdfCopy(document, new FileOutputStream(newFile));//输出pdf初始化
+
+ document.open();
+ for (int j = start; j <= end; j++) {
+ document.newPage();
+ PdfImportedPage page = copy.getImportedPage(reader, j);//翻页到初始页
+ copy.addPage(page);//输出文件追加内容
+ }
+ document.close();
+ } catch (Exception e) {
+ e.printStackTrace();
+ System.err.println("split pdf file error:" + e.getMessage());
+ }
+ }
+
+}
--
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