PDF预览

第一种：直接预览

@GetMapping(value = "preview")
    public void  preview(HttpServletRequest request, HttpServletResponse response) throws IOException {
        FileInputStream in = null;
        OutputStream out = null;
        try {
            in = new FileInputStream(new File("D:\\test\\有效需求分析.pdf"));
            out = response.getOutputStream();
            byte[] b = new byte[512];
            while ((in.read(b))!=-1) {
                out.write(b);
            }
            out.flush();
        }catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (in != null) {
                in.close();
            }
            if (out != null) {
                out.close();
            }
        }
    }

 

第二种：使用pdf-box

引入依赖，这个依赖可以修改预览时在页面上显示的PDF的名称

 <dependency>
     <groupId>org.apache.pdfbox</groupId>
     <artifactId>pdfbox</artifactId>
     <version>2.0.26</version>
</dependency>

生成预览

@GetMapping(value = "preview")
    public void previewTemplate(HttpServletRequest request,HttpServletResponse response) throws Exception {
        try {
            response.reset();
            response.setContentType("application/pdf");
            //设置可iframe嵌套
            response.setHeader("X-Frame-Options", "ALLOWALL");
            OutputStream out = response.getOutputStream();

            //加载PDF
            String file = "D:\\test\\template.pdf";
            PDDocument pdDocument = PDDocument.load(new FileInputStream(file));
            //获得文档属性对象
            PDDocumentInformation info = pdDocument.getDocumentInformation();
            //设置名称
            info.setTitle("自定义PDF名称");
            pdDocument.setDocumentInformation(info);
            pdDocument.save(out);
            pdDocument.close();
            out.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

效果