1.需要导入的包
<dependency> <groupId>org.eclipse.birt.runtime.3_7_1</groupId> <artifactId>com.lowagie.text</artifactId> <version>2.1.7</version> </dependency> <dependency> <groupId>com.itextpdf</groupId> <artifactId>itextpdf</artifactId> <version>5.5.7</version> </dependency>
2.工具类方法如下 package net.longjin.comm.utils; import com.lowagie.text.Document; import com.lowagie.text.Image; import com.lowagie.text.Rectangle; import com.lowagie.text.pdf.PdfWriter; import javax.imageio.ImageIO; import java.awt.image.BufferedImage; import java.io.File; import java.io.FileOutputStream; /** * 描述:多张图片转PDF * * @author 何志鹏 * @ClassName:ImageToPdf * @create 2019-11-14 10:25 * Version 1.0 */ public class ImageToPdf { public static void toPdf(String imageFolderPath, String pdfPath) { try { // 图片地址 String imagePath = null; // 输入流 FileOutputStream fos = new FileOutputStream(pdfPath); // 创建文档 Document doc = new Document(null, 0, 0, 0, 0); //doc.open(); // 写入PDF文档 PdfWriter.getInstance(doc, fos); // 读取图片流 BufferedImage img = null; // 实例化图片 Image image = null; // 获取图片文件夹对象 File file = new File(imageFolderPath); File[] files = file.listFiles(); // 循环获取图片文件夹内的图片 for (File file1 : files) { if (file1.getName().endsWith(".png") || file1.getName().endsWith(".jpg") || file1.getName().endsWith(".gif") || file1.getName().endsWith(".jpeg") || file1.getName().endsWith(".tif")) { imagePath = imageFolderPath + file1.getName(); System.out.println(file1.getName()); // 读取图片流 img = ImageIO.read(new File(imagePath)); doc.setPageSize(new Rectangle(img.getWidth(), img .getHeight())); // 根据图片大小设置文档大小 doc.setPageSize(new Rectangle(img.getWidth(), img .getHeight())); // 实例化图片 image = Image.getInstance(imagePath); // 添加图片到文档 doc.open(); doc.add(image); } } // 关闭文档 doc.close(); } catch (Exception e) { e.printStackTrace(); } } public static void main(String[] args) { long time1 = System.currentTimeMillis(); toPdf("D:/photo/", "D:/photo.pdf"); long time2 = System.currentTimeMillis(); int time = (int) ((time2 - time1) / 1000); System.out.println("执行了:" + time + "秒!"); } }