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