java 实现在线阅读 .pdf

1.资源的本地地址

2.设置响应头

3.代码实现

 @ResponseBody
     @RequestMapping(value = "/read")
     @ApiOperation(value="阅读", httpMethod = "GET", notes = "阅读")
     public String read(@ApiParam(required = true, name="id", value="")@RequestParam(value="id", required=true)String id,
                        HttpServletRequest request,HttpServletResponse response) throws IOException {
         PeriodicalResource periodicalResource = periodicalResourceService.get(id);
         String filePath = periodicalResource.getAttachment();
         File file = new File(periodicalBaseDir + filePath);//本地资源位置
         if (file.exists()) {
             response.setContentType("text/html; charset=UTF-8");//文本&编码
             response.setContentType("application/pdf");//pdf
             byte[] buffer = new byte[16*1024];
             FileInputStream fis = null;
             BufferedInputStream bis = null;
             try {
                 fis = new FileInputStream(file);
                 bis = new BufferedInputStream(fis);
                 OutputStream os = response.getOutputStream();
                 int i = bis.read(buffer);
                 while (i != -1) {
                     os.write(buffer, 0, i);
                     i = bis.read(buffer);
                 }
             } catch (Exception e) {
                 e.printStackTrace();
             } finally {
                 if (bis != null) {
                     try {
                         bis.close();
                     } catch (IOException e) {
                         e.printStackTrace();
                     }
                 }
                 if (fis != null) {
                     try {
                         fis.close();
                     } catch (IOException e) {
                         e.printStackTrace();
                     }
                 }
             }
         }
         return null;
     }

4.总结一下经验 记录一下实现过程

虽然实现但是自己还是很懵逼 ，主要涉及的技术有 IO流，File 文件 两大技术

　　在学校时 ，总感觉自己萌萌哒 ，结果工作之后自己咻咻咻 ，还要学习的东西很多啦

希望自己的建议可以帮助各位道友    加油     一直在路上