JAVA 实现给PDF的图像批量添加超链接（已优化）

更新优化版转： JAVA 实现给PDF的图像批量添加超链接-优快云博客

我的PDF长这样：

因为需要给每个图片增加对应的超链接，工作比较繁琐，所以做了如下尝试。

步骤一：获取PDF上的图片信息（因为图片布局不规范，无法按照固定的坐标去添加链接，所以先获取各个图片的布局坐标）：

package pdf.pdf;


import com.spire.pdf.PdfDocument;
import com.spire.pdf.PdfPageBase;
import com.spire.pdf.exporting.PdfImageInfo;

import java.awt.geom.Rectangle2D;
import java.util.*;

public class GetCoordinateOfImage {

    public  List<Point> getCoordinateOfImage(PdfDocument doc,Integer num) throws Exception {
        if(doc.getPages().getCount()==0){
            System.out.println("第"+num+"页getCoordinateOfImage IS NULL!!!");
            return null;};
        PdfPageBase page = doc.getPages().get(num);
        //获取第一页上的图片信息
        PdfImageInfo[] imageInfo = page.getImagesInfo();
        Map<String,List<Integer>> map=new HashMap<>();
        List<Integer> listX=new ArrayList<>();
        List<Integer> listY=new ArrayList<>();
            for (int i = 0; i < imageInfo.length; i++) {
                //获取指定图片的边界属性
                Rectangle2D rect = imageInfo[i].getBounds();
                listX.add((int) rect.getMinX());
                listY.add((int) rect.getMinY());
                //File outputfile = new File("第 " + (i) + "张" + i + ".jpg");
                //ImageIO.write(imageInfo[i].getImage(), "jpg", outputfile);
        }
            Integer pageNum=num+1;
        List<Integer> listXFinal=new ArrayList<>();
        List<Integer> listYFinal=new ArrayList<>();
        listXFinal=ListUtils.duplicateListBySet(listX);
        listYFinal=ListUtils.reverse(ListUtils.duplicateListBySet(listY));
        System.out.println( "第"+pageNum+"页的X数据为："+listXFinal);
        System.out.println( "第"+pageNum+"页的Y数据为："+listYFinal);
                System.out.println( "第"+pageNum+"页的数据为："+ ListUtils.listPoint(ListUtils.deviation(listXFinal),ListUtils.deviation(listYFinal)));
        System.out.println( "第"+pageNum+"页的数据量为："+ListUtils.listPoint(ListUtils.deviation(listXFinal),ListUtils.deviation(listYFinal)).size());
        return ListUtils.listPoint(ListUtils.deviation(listXFinal),
                ListUtils.deviation(listYFinal));
    }


}

步骤2：根据图片坐标，用org.apache.pdfbox添加区域超链接：

package pdf.pdf;

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.common.PDRectangle;
import org.apache.pdfbox.pdmodel.interactive.action.PDActionURI;
import org.apache.pdfbox.pdmodel.interactive.annotation.PDAnnotationLink;
import org.apache.pdfbox.pdmodel.interactive.annotation.PDBorderStyleDictionary;

import java.io.IOException;
import java.util.List;

public class AddLinks {

    public static void main(String[] args) throws Exception {

    }
    public String addLink(PDDocument document, int pageNumber,
                         String url, List<Point> lists) throws IOException {

        Integer pagenum=pageNumber+1;
        System.out.println("页码"+pagenum+"开始添加link任务！");
        String tips="";
          List<String> picUrls=ReadExcelData.getFinalList("/Users/gwx/Desktop/java/pdf/表格.xlsx",pageNumber);
        if(pageNumber>9) {return "PDF任务全部完成！！！！";}
        else{
        for(int i = 0; i <= lists.size(); i++){
            if(i>51){return "页码"+pagenum+"完成添加link任务！";}
                try {
                    System.out.println(String.format("页码%d添加link第%d张图片的对角坐标为：（（%f, %f,%f, %f））,", pagenum, i+1,lists.get(i).getStartX(),lists.get(i).getStartY(),
                            lists.get(i).getStartX() + lists.get(i).getWidth(),
                            lists.get(i).getStartY() +   lists.get(i).getHight()));
                    PDAnnotationLink txtLink = new PDAnnotationLink();
                    //设置每个图片的坐标 16和46是我试出来的，没啥科学规律
                    PDRectangle position = new PDRectangle();
                    position.setLowerLeftX(lists.get(i).getStartX());
                    position.setLowerLeftY(lists.get(i).getStartY()+16);
                    position.setUpperRightX(lists.get(i).getStartX() + lists.get(i).getWidth());
                    position.setUpperRightY(lists.get(i).getStartY() + 46);
                    txtLink.setRectangle(position);

                    // 去除边框
                    PDBorderStyleDictionary borderStyle = new PDBorderStyleDictionary();
                    borderStyle.setWidth(0);
                    txtLink.setBorderStyle(borderStyle);

                    PDActionURI action = new PDActionURI();
                    action.setURI(picUrls.get(i));
                    txtLink.setAction(action);
                    page.getAnnotations().add(txtLink);

                    tips= "Finished!";
                } catch (IOException e) {
                    tips="页码"+pagenum+"添加失败==》"+e.getMessage();
                }
            System.out.println(String.format("页码%d添加link第%d张图添加成功",pagenum,i+1));
        }}
        tips="页码"+pagenum+"完成添加link任务！";
        return tips;
    }
}

步骤3：main函数调用方法，执行：

package pdf.pdf;

import com.spire.pdf.PdfDocument;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;

import java.io.File;
import java.util.List;
 
public class Main {


    public static void main(String[] args) throws Exception {
        //创建PdfDocument对象
        PdfDocument doc = new PdfDocument();
        //加载一个PDF文档
        doc.loadFromFile("/Users/gwx/Desktop/java/pdf/416--添加链接.pdf");
        File file = new File("/Users/gwx/Desktop/java/pdf/416--添加链接.pdf");
        PDDocument doc1 = PDDocument.load(file);
        GetCoordinateOfImage test=new GetCoordinateOfImage();

        for (int i = 2; i <doc1.getNumberOfPages(); i++) {
                Integer pageNum=i+1;
                System.out.println("页码任务"+pageNum+"开始喽～");
                PDPage page=doc1.getPage(i);
                List<Point> list=test.getCoordinateOfImage(doc,i);
                PDFReader.readImage(page,i,doc1,list);
        }
        doc1.save("ceshi.pdf");
        doc1.close();
        doc.close();
    }
}

程序运行结果如下：

maven配置如下：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>pdf.pdf</groupId>
    <artifactId>pdf</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <maven.compiler.source>20</maven.compiler.source>
        <maven.compiler.target>20</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.9</version>
        </dependency>
        <!--xlsx(07)-->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.9</version>
        </dependency>
        <dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>itextpdf</artifactId>
            <version>5.5.11</version>
        </dependency>
        <dependency>
            <groupId>e-iceblue</groupId>
            <artifactId>spire.pdf</artifactId>
            <version>9.6.2</version>
            <scope>system</scope>
            <systemPath>${pom.basedir}/src/main/resources/lib/spire.pdf-9.6.2.jar</systemPath>
        </dependency>

        <dependency>
            <groupId>org.apache.pdfbox</groupId>
            <artifactId>fontbox</artifactId>
            <version>2.0.27</version>
        </dependency>
        <dependency>
            <groupId>org.apache.pdfbox</groupId>
            <artifactId>jempbox</artifactId>
            <version>1.8.17</version>
        </dependency>
        <dependency>
            <groupId>org.apache.pdfbox</groupId>
            <artifactId>xmpbox</artifactId>
            <version>2.0.27</version>
        </dependency>
        <dependency>
            <groupId>org.apache.pdfbox</groupId>
            <artifactId>preflight</artifactId>
            <version>2.0.27</version>
        </dependency>
        <dependency>
            <groupId>org.apache.pdfbox</groupId>
            <artifactId>pdfbox-tools</artifactId>
            <version>2.0.27</version>
        </dependency>
        <dependency>
            <groupId>org.apache.xbean</groupId>
            <artifactId>xbean-reflect</artifactId>
            <version>3.7</version>
        </dependency>

    </dependencies>

</project>