图片上的文字、表格提取，请用java

可以使用Java中的Apache PDFBox库来实现图片上的文字、表格提取。以下是一个简单的示例代码，可以提取PDF文件中的文本和表格：

import java.io.IOException;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.text.PDFTextStripper;
import org.apache.pdfbox.text.PDFTextStripperByArea;
import org.apache.pdfbox.pdfparser.PDFParser;
import org.apache.pdfbox.cos.COSDocument;
import org.apache.pdfbox.io.RandomAccessFile;

public class PDFExtractor {

    public static void main(String[] args) throws IOException {
        
        // Load PDF file
        PDDocument document = PDDocument.load(new File("example.pdf"));

        // Extract text from PDF
        PDFTextStripper stripper = new PDFTextStripper();
        String text = stripper.getText(document);
        System.out.println("Extracted Text:\n" + text);

        // Extract table from PDF
        PDFTextStripperByArea stripperByArea = new PDFTextStripperByArea();
        stripperByArea.setSortByPosition(true);
        Rectangle rect = new Rectangle(10, 280, 580, 60);
        stripperByArea.addRegion("tableRegion", rect);
        PDPage firstPage = document.getPage(0);
        stripperByArea.extractRegions(firstPage);

        List<String> tableData = new ArrayList<>();
        for (String line : stripperByArea.getTextForRegion("tableRegion").split("\n")) {
            String[] cols = line.split("\\s+");
            for (String col : cols) {
                tableData.add(col);
            }
        }
        System.out.println("Extracted Table:\n" + tableData);

        // Close PDF document
        document.close();
    }
}

需要注意的是，PDFBox库需要依赖的jar包较多，需要在项目中添加以下依赖：

<dependency>
    <groupId>org.apache.pdfbox</groupId>
    <artifactId>pdfbox</artifactId>
    <version>2.0.24</version>
</dependency>
<dependency>
    <groupId>org.apache.pdfbox</groupId>
    <artifactId>pdfbox-tools</artifactId>
    <version>2.0.24</version>
</dependency>
<dependency>
    <groupId>org.apache.pdfbox</groupId>
    <artifactId>fontbox</artifactId>
    <version>2.0.24</version>
</dependency>
<dependency>
    <groupId>org.apache.pdfbox</groupId>
    <artifactId>pdfbox-reactor</artifactId>
    <version>2.0.24</version>
</dependency>
<dependency>
    <groupId>org.apache.pdfbox</groupId>
    <artifactId>pdfbox-debugger</artifactId>
    <version>2.0.24</version>
</dependency>
<dependency>
    <groupId>org.apache.pdfbox</groupId>
    <artifactId>pdfbox-jbig2</artifactId>
    <version>2.0.24</version>
</dependency>
<dependency>
    <groupId>org.apache.pdfbox</groupId>
    <artifactId>pdfbox-legacy</artifactId>
    <version>2.0.24</version>
</dependency>
<dependency>
    <groupId>org.apache.pdfbox</groupId>
    <artifactId>pdfbox-examples</artifactId>
    <version>2.0.24</version>
</dependency>