java代码实现对pdf文件文本和图片内容的提取

谁借莪１个温暖的怀抱￠ 2022-09-14 13:22 484阅读 0赞

# **教程** #

## pom文件引入jar依赖 ##

<dependency>
    			<groupId>org.apache.pdfbox</groupId>
    			<artifactId>pdfbox</artifactId>
    			<version>3.0.0-RC1</version>
    		</dependency>
    		<dependency>
    			<groupId>com.github.jai-imageio</groupId>
    			<artifactId>jai-imageio-jpeg2000</artifactId>
    			<version>1.3.0</version>
    		</dependency>

## java核心代码实现 ##

import org.apache.pdfbox.Loader;
    import org.apache.pdfbox.pdmodel.PDDocument;
    import org.apache.pdfbox.pdmodel.PDPage;
    import org.apache.pdfbox.pdmodel.PDPageTree;
    import org.apache.pdfbox.pdmodel.PDResources;
    import org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject;
    import org.apache.pdfbox.text.PDFTextStripper;
    
    import javax.imageio.ImageIO;
    import java.awt.image.BufferedImage;
    import java.io.*;
    import java.util.Iterator;
    
    public class PDFUtil {
    
        public static void main(String[] args) throws IOException {
            //提取图片
            extractImages("C:\\Users\\liuya\\Desktop\\word\\帆软报表帮助文档.pdf");
            //提取文字
            extractText("C:\\Users\\liuya\\Desktop\\word\\帆软报表帮助文档.pdf");
    
        }
    
    
        /**
         * 提取文本
         * @return
         */
        public static void extractText(String path){
            try {
                File fdf = new File(path);
                //通过文件名加载文档
                PDDocument pdd = Loader.loadPDF(fdf);
                //获取文档的页数
                int pageNumber = pdd.getNumberOfPages();
                //剥离器（读取pdf文件）
                PDFTextStripper stripper = new PDFTextStripper();
                //排序
                stripper.setSortByPosition(true);
                //设置要读取的起始页码
                stripper.setStartPage(1);
                //设置要读取的结束页码
                stripper.setEndPage(pageNumber);
              //  System.out.println(stripper.getText(pdd));
                //生成的txt的文件路径
                String docPath =path.substring(0,path.lastIndexOf("."))+".txt";
                File doc = new File(docPath);
                if(!doc.exists()){
                    doc.createNewFile();
                }
                //文件输出流
                FileOutputStream fos = new FileOutputStream(doc);
                Writer writer = new OutputStreamWriter(fos, "utf-8");
                stripper.writeText(pdd, writer);
                writer.close();
                fos.close();
                System.out.println("提取文本完成");
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    
    
        /**
         * 提取图片
         * @return
         */
        public static boolean extractImages(String path) {
            boolean result = true;
            try{
                File fdf = new File(path);
                //通过文件名加载文档
                PDDocument document = Loader.loadPDF(fdf);
                PDPageTree pages = document.getPages();
                Iterator<PDPage> iter = pages.iterator();
                //生成的txt的文件路径
                String  imagePath =path.substring(0,path.lastIndexOf("."));
                while(iter.hasNext()){
                    PDPage page = iter.next();
                    PDResources resources  =page.getResources();
                    resources.getXObjectNames().forEach(e->{
                        try {
                            if(resources.isImageXObject(e)){
                                PDImageXObject imageXObject=(PDImageXObject)resources.getXObject(e);
                                BufferedImage bufferedImage= imageXObject.getImage();
                                System.out.println(bufferedImage);
                                ImageIO.write(bufferedImage,"jpg",new File(imagePath+"_"+e+".jpg"));
                            }
                        } catch (IOException ioException) {
                            ioException.printStackTrace();
                        }
                    });
                    System.out.println("----------------------------------------------");
                }
                System.out.println("提取图片完成");
            //    document.save(fdf);
                document.close();
            } catch(IOException ex){
                ex.printStackTrace();
                return false;
            }
            return result;
        }
    
    
    }

## idea控制台运行输出 ##

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBA5rSb6Ziz5rOw5bGx_size_20_color_FFFFFF_t_70_g_se_x_16][]

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBA5rSb6Ziz5rOw5bGx_size_20_color_FFFFFF_t_70_g_se_x_16 1][]

### 提取文件和原pdf文件在同一文件夹下 ###

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBA5rSb6Ziz5rOw5bGx_size_20_color_FFFFFF_t_70_g_se_x_16 2][]

### 原pdf内容部分展示 ###

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBA5rSb6Ziz5rOw5bGx_size_20_color_FFFFFF_t_70_g_se_x_16 3][]

### 提取文本展示 ###

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBA5rSb6Ziz5rOw5bGx_size_20_color_FFFFFF_t_70_g_se_x_16 4][]

### 提取图片展示 ###

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBA5rSb6Ziz5rOw5bGx_size_20_color_FFFFFF_t_70_g_se_x_16 5][]

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