java读取pdf文本转换html

补充：一下代码基于maven，现将依赖的jar包单独导出

地址：pdf jar

完整代码地址 也就两个文件

 

 java读取pdf中的纯文字，这里使用的是pdfbox工具包

maven引入如下配置

　　　　 <dependency>
            <groupId>net.sf.cssbox</groupId>
            <artifactId>pdf2dom</artifactId>
            <version>1.7</version>
        </dependency>
        <dependency>
            <groupId>org.apache.pdfbox</groupId>
            <artifactId>pdfbox</artifactId>
            <version>2.0.12</version>
        </dependency>
        <dependency>
            <groupId>org.apache.pdfbox</groupId>
            <artifactId>pdfbox-tools</artifactId>
            <version>2.0.12</version>
        </dependency>

工具类直接读取

代码示例

　　/*
    读取pdf文字
     */
    @Test
    public void readPdfTextTest() throws IOException {
        byte[] bytes = getBytes("D:\code\pdf\HashMap.pdf");
        //加载PDF文档
        PDDocument document = PDDocument.load(bytes);
        readText(document);
    }

    public void readText(PDDocument document) throws IOException {
        PDFTextStripper stripper = new PDFTextStripper();
        String text = stripper.getText(document);
        System.out.println(text);
    }

将pdf转换为html

效果图

 代码示例

/*
    pdf转换html
     */
    @Test
    public void pdfToHtmlTest()  {
        String outputPath = "D:\code\pdf\HashMap.html";
        byte[] bytes = getBytes("D:\code\pdf\HashMap.pdf");
//        try() 写在()里面会自动关闭流
        try (BufferedWriter out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(new File(outputPath)),"UTF-8"));){
            //加载PDF文档
            PDDocument document = PDDocument.load(bytes);
            PDFDomTree pdfDomTree = new PDFDomTree();
            pdfDomTree.writeText(document,out);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    /*
    将文件转换为byte数组
     */
    private byte[] getBytes(String filePath){
        byte[] buffer = null;
        try {
            File file = new File(filePath);
            FileInputStream fis = new FileInputStream(file);
            ByteArrayOutputStream bos = new ByteArrayOutputStream(1000);
            byte[] b = new byte[1000];
            int n;
            while ((n = fis.read(b)) != -1) {
                bos.write(b, 0, n);
            }
            fis.close();
            bos.close();
            buffer = bos.toByteArray();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return buffer;
    }

完整的一个上传pdf转换为HTML功能（今后转换pdf也不需要找什么第三方了，哈哈）

@RequestMapping("ud")
@Controller
public class UpAndDownController {
    @RequestMapping("upload.do")
    @ResponseBody
    public Map<String,Object> upload(@RequestParam("file") MultipartFile file, HttpServletRequest request){
        Map<String, Object> map = new HashMap<>();
        map.put("code","200");
        try {
            PdfConvertUtil pdfConvertUtil = new PdfConvertUtil();
            String pdfName = file.getOriginalFilename();
            int lastIndex = pdfName.lastIndexOf(".pdf");
            String fileName = pdfName.substring(0, lastIndex);
            String htmlName = fileName + ".html";
            String realPath = ResourceUtils.getURL("classpath:").getPath() + "/templates/file";
            File f = new File(realPath);
            if(!f.exists()){
                f.mkdirs();
            }
            String htmlPath = realPath + "\" + htmlName;
            pdfConvertUtil.pdftohtml(file.getBytes(), htmlPath);
        } catch (Exception e) {
            map.put("code","500");
            e.printStackTrace();
        }
        return map;
    }

}

可以使用postman调试

需要设置请求头 Content-Type 指定为 application/x-www-form-urlencoded

之后选择body选择form-data，OK

 

如果涉及到HTML页面直接加载PDF，无需插件

可以参考下 

https://www.cnblogs.com/jacksoft/p/5302587.html

https://github.com/mozilla/pdf.js