引入依赖

        <dependency>
            <groupId>org.apache.pdfbox</groupId>
            <artifactId>pdfbox</artifactId>
            <version>2.0.28</version>
        </dependency>

样例代码

    public static String pdf2text(InputStream inputStream) {
        String text = "";
        try (PDDocument document = PDDocument.load(inputStream)) {
            PDFTextStripper stripper = new PDFTextStripper();
            text = stripper.getText(document);
        } catch (IOException e) {
            log.error("解析PDF文件失败！", e);
        }
        return text;
    }