Java实现图片保存到pdf的某个位置2

Java实现图片保存到pdf的某个位置2

1、依赖–maven

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

2、上代码

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.LosslessFactory;
import org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject;import javax.imageio.ImageIO;
import java.awt.geom.Point2D;
import java.io.File;
import java.io.IOException;public class PdfBoxInsertImageExample {// 主函数，用于展示如何调用insertImageIntoPdf方法public static void main(String[] args) {try {File originalPdf = new File("path/to/original.pdf"); // 原始PDF文件路径File tempPdf = new File("path/to/temp.pdf"); // 临时保存修改后PDF的路径insertImageIntoPdf(originalPdf, tempPdf, 0, new Point2D.Float(100, 100), "path/to/image.jpg", null, null);} catch (IOException e) {e.printStackTrace(); // 打印异常信息，方便调试}}// 实现将图片插入PDF页面的方法public static void insertImageIntoPdf(File sourcePdf, File targetPdf, int pageIndex,Point2D.Float position, String imagePath,Float desiredWidth, Float desiredHeight) throws IOException {try (PDDocument document = PDDocument.load(sourcePdf)) { // 加载原始PDF文档// 获取指定索引的页面，pageIndex从0开始计数PDPage page = document.getPage(pageIndex);// 从imagePath路径读取图片并转换为PDF支持的图像对象PDImageXObject image = LosslessFactory.createFromImage(document, ImageIO.read(new File(imagePath)));// 获取图片原始尺寸float originalWidth = image.getWidth();float originalHeight = image.getHeight();// 计算图片的新尺寸，如果指定了desiredWidth或desiredHeight则进行调整，同时保持原始比例float scaleX = (desiredWidth != null) ? desiredWidth / originalWidth : 1f;float scaleY = (desiredHeight != null) ? desiredHeight / originalHeight : 1f;// 如果只设置了宽度或高度，则自动调整另一个维度以保持比例if (desiredWidth == null && desiredHeight != null) {scaleX = scaleY;} else if (desiredWidth != null && desiredHeight == null) {scaleY = scaleX;}// 计算调整后的宽度和高度float newWidth = originalWidth * scaleX;float newHeight = originalHeight * scaleY;// 创建内容流，用于在页面上绘制图像try (PDPageContentStream contentStream = new PDPageContentStream(document, page, PDPageContentStream.AppendMode.APPEND, true)) {// 在指定位置绘制调整大小后的图片contentStream.drawImage(image, position.x, position.y, newWidth, newHeight);}// 保存所有修改到目标PDF文件document.save(targetPdf);}}
}