import com.spire.pdf.*;

import javax.imageio.ImageIO;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.FileWriter;

import java.io.IOException;

public class ExtractText {

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

        //加载测试文档

        PdfDocument pdf = new PdfDocument("sample.pdf");

        //实例化StringBuilder类

        StringBuilder sb = new StringBuilder();

        //定义一个int型变量

        int index = 0;

        //遍历PDF文档中每页

        PdfPageBase page;

        for (int i= 0; i<pdf.getPages().getCount();i++) {

            page = pdf.getPages().get(i);

            //调用extractText()方法提取文本

            sb.append(page.extractText(true));

            FileWriter writer;

            try {

                //将StringBuilder对象中的文本写入到txt

                writer = new FileWriter("ExtractText.txt");

                writer.write(sb.toString());

                writer.flush();

            } catch (IOException e) {

                e.printStackTrace();

            }

            //调用extractImages方法获取图片

            for (BufferedImage image : page.extractImages()) {

                    //指定输出图片名，指定图片格式

                    File output = new File(String.format("Image_%d.png", index++));

                    ImageIO.write(image, "PNG", output);

            }

        }

        pdf.close();

    }

}