<repositories>
    <repository>
        <id>com.e-iceblue</id>
        <name>e-iceblue</name>
        <url>https://repo.e-iceblue.cn/repository/maven-public/</url>
    </repository>
</repositories>
<dependencies>
    <dependency>
        <groupId>e-iceblue</groupId>
        <artifactId>spire.pdf</artifactId>
        <version>11.10.3</version>
    </dependency>
</dependencies>

import com.spire.pdf.*;
import com.spire.pdf.utilities.PdfTable;
import com.spire.pdf.utilities.PdfTableExtractor;

import java.io.FileWriter;
import java.io.IOException;

public class ExtractTable {
    public static void main(String[] args)throws IOException {
        //实例化PdfDocument类的对象
        PdfDocument pdf = new PdfDocument();

        //加载PDF文档
        pdf.loadFromFile("test.pdf");

        //创建StringBuilder类的实例
        StringBuilder builder = new StringBuilder();

        //创建PdfTableExtractor类的对象
        PdfTableExtractor extractor = new PdfTableExtractor(pdf);

        //遍历每一页
        for (int page = 0; page < pdf.getPages().getCount(); page++)
        {
            //提取页面中的表格存入PdfTable[]数组
            PdfTable[] tableLists = extractor.extractTable(page);
            if (tableLists != null && tableLists.length > 0)
            {
                //遍历表格
                for (PdfTable table : tableLists)
                {
                    int row = table.getRowCount();//获取表格行
                    int column = table.getColumnCount();//获取表格列
                    for (int i = 0; i < row; i++)
                    {
                        for (int j = 0; j < column; j++)
                        {
                            //获取表格中的文本内容
                            String text = table.getText(i, j);

                            //将获取的text写入StringBuilder容器
                            builder.append(text+" ");
                        }
                        builder.append("\r\n");
                    }
                }
            }
        }

        //保存为txt文档
        FileWriter fileWriter = new FileWriter("ExtractedTable.txt");
        fileWriter.write(builder.toString());
        fileWriter.flush();
        fileWriter.close();
    }
}