java实现提取pdf文件里面的表格数据

可以使用Apache PDFBox来提取PDF文件中的表格数据。下面是一个简单的Java代码示例，演示如何使用PDFBox提取表格数据。

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

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.text.PDFTextStripper;
import org.apache.pdfbox.text.PDFTextStripperByArea;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.common.PDRectangle;
import org.apache.pdfbox.contentstream.PDFStreamEngine;
import org.apache.pdfbox.contentstream.operator.Operator;
import org.apache.pdfbox.contentstream.operator.state.Concatenate;
import org.apache.pdfbox.contentstream.operator.state.Restore;
import org.apache.pdfbox.contentstream.operator.state.Save;
import org.apache.pdfbox.contentstream.operator.state.SetGraphicsStateParameters;
import org.apache.pdfbox.contentstream.operator.state.SetMatrix;
import org.apache.pdfbox.contentstream.operator.DrawObject;
import org.apache.pdfbox.contentstream.operator.color.SetStrokingColor;
import org.apache.pdfbox.contentstream.operator.color.SetNonStrokingColor;
import org.apache.pdfbox.contentstream.operator.color.SetStrokingColorSpace;
import org.apache.pdfbox.contentstream.operator.color.SetNonStrokingColorSpace;
import org.apache.pdfbox.contentstream.operator.color.SetStrokingDeviceGrayColor;
import org.apache.pdfbox.contentstream.operator.color.SetNonStrokingDeviceGrayColor;
import org.apache.pdfbox.contentstream.operator.color.SetStrokingDeviceRGBColor;
import org.apache.pdfbox.contentstream.operator.color.SetNonStrokingDeviceRGBColor;
import org.apache.pdfbox.contentstream.operator.color.SetStrokingDeviceCMYKColor;
import org.apache.pdfbox.contentstream.operator.color.SetNonStrokingDeviceCMYKColor;
import org.apache.pdfbox.contentstream.operator.markedcontent.BeginMarkedContentSequence;
import org.apache.pdfbox.contentstream.operator.markedcontent.EndMarkedContentSequence;
import org.apache.pdfbox.contentstream.operator.markedcontent.BeginMarkedContent;
import org.apache.pdfbox.contentstream.operator.markedcontent.EndMarkedContent;
import org.apache.pdfbox.contentstream.operator.text.BeginText;
import org.apache.pdfbox.contentstream.operator.text.EndText;
import org.apache.pdfbox.contentstream.operator.text.MoveText;
import org.apache.pdfbox.contentstream.operator.text.MoveTextSetLeading;
import org.apache.pdfbox.contentstream.operator.text.NextLine;
import org.apache.pdfbox.contentstream.operator.text.SetCharSpacing;
import org.apache.pdfbox.contentstream.operator.text.SetFontAndSize;
import org.apache.pdfbox.contentstream.operator.text.SetTextHorizontalScaling;
import org.apache.pdfbox.contentstream.operator.text.SetTextLeading;
import org.apache.pdfbox.contentstream.operator.text.SetTextMatrix;
import org.apache.pdfbox.contentstream.operator.text.SetTextRenderingMode;
import org.apache.pdfbox.contentstream.operator.text.SetTextRise;
import org.apache.pdfbox.contentstream.operator.text.ShowText;
import org.apache.pdfbox.contentstream.operator.text.ShowTextAdjusted;
import org.apache.pdfbox.contentstream.operator.text.ShowTextLine;
import org.apache.pdfbox.contentstream.operator.text.ShowTextLineAndSpace;
import org.apache.pdfbox.contentstream.operator.text.ShowTextLineSpacing;
import org.apache.pdfbox.contentstream.operator.text.ShowTextWordSpacing;
import org.apache.pdfbox.contentstream.operator.text.ShowTextWords;

public class PDFTableExtractor {

    public static void main(String[] args) {
        try {
            PDDocument document = PDDocument.load(new File("example.pdf"));
            PDFTextStripper stripper = new PDFTextStripper();
            String text = stripper.getText(document);
            System.out.println(text);
            document.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

该代码将加载名为"example.pdf"的PDF文件，并使用PDFTextStripper来提取其中的文本数据。你也可以使用类似的方法，提取表格数据并将其转换为其他格式，例如CSV或Excel。