问如何使用java将多个pdf文件中的信息提取到文本中？

EN

    public String getData(String fileName) throws IOException {
        PDFTextStripper pdfStripper;
        PDDocument pdDoc;
        COSDocument cosDoc;
        ClassPathResource accountStatement = new ClassPathResource(fileName);

        PDFParser parser = new PDFParser(accountStatement.getInputStream());
        parser.parse();
        cosDoc = parser.getDocument();
        pdfStripper = new PDFTextStripper();
        pdDoc = new PDDocument(cosDoc);
        pdfStripper.setStartPage(1);
        pdfStripper.setEndPage(2);
        String text = pdfStripper.getText(pdDoc);
        pdDoc.close();
        return text;
}