Java：获取PDF文件的总页数

引入依赖

<!--pdf-->
<dependency><groupId>org.apache.pdfbox</groupId><artifactId>pdfbox</artifactId><version>2.0.24</version>
</dependency>

代码工具类

package com.example.util;import org.apache.pdfbox.pdmodel.PDDocument;import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;/*** PDF工具类*/
public class PdfUtil {/*** 获取PDF文件的总页数** @param pdfUrl* @return*/public static int getPdfTotalPage(String pdfUrl) {if (pdfUrl == null || "".equals(pdfUrl)) {return 0;}int pages = 0;URL url = null;InputStream inputStream = null;PDDocument pdDocument = null;// 尝试打开文件流try {url = new URL(pdfUrl);} catch (MalformedURLException e) {e.printStackTrace();}if (url != null) {try {inputStream = url.openStream();} catch (IOException e) {e.printStackTrace();}}// 读取pdf的页数if (inputStream != null) {try {pdDocument = PDDocument.load(inputStream);pages = pdDocument.getNumberOfPages();} catch (IOException e) {e.printStackTrace();}}// 善后工作if (pdDocument != null) {try {pdDocument.close();} catch (IOException e) {e.printStackTrace();}}if (inputStream != null) {try {inputStream.close();} catch (IOException e) {e.printStackTrace();}}return pages;}
}

测试类

package com.example.util;import org.junit.jupiter.api.Test;import java.io.IOException;public class PdfUtilTest {@Testpublic void getPdfTotalPage() throws IOException {String pdfUrl = "https://pdf.dfcfw.com/pdf/H3_AP202402231623204056_1.pdf?1708699798000.pdf";int pdfTotalPage = PdfUtil.getPdfTotalPage(pdfUrl);System.out.println(pdfTotalPage); // 17}
}

参考文章

• java读取PDF页数