java 图片预览和下载setContentType对功能的影响问题

悬赏园豆：5 [已解决问题] 解决于 2023-02-02 16:32

Spring Boot版本 2.5.0

response.setContentType("image/*")的位置影响了下载和预览

放在获取读取文件流并赋值给putputStream之后是预览

    @ApiOperation("显示图片")
    @GetMapping("/showImage")
    public void getImg(HttpServletResponse response) throws IOException {
        response.reset();
        response.setCharacterEncoding("utf-8");

        ServletOutputStream outStream = response.getOutputStream(); 

        String path = "F:\\JC_T\\003W6jfdly1gtvkk0uzwuj68zh6qm7wl02.jpg";
        File file = new File(path);
        FileCopyUtils.copy(new FileInputStream(file), outStream);

        response.setContentType("image/*");

        outStream.flush();
        outStream.close();
    }

效果如图

放在获取读取文件流并赋值给putputStream之前是下载

  @ApiOperation("显示图片")
    @GetMapping("/showImage")
    public void getImg(HttpServletResponse response) throws IOException {
        response.reset();
        response.setCharacterEncoding("utf-8");

        ServletOutputStream outStream = response.getOutputStream(); //得到向客户端输出二进制数据的对象

        String path = "F:\\JC_T\\003W6jfdly1gtvkk0uzwuj68zh6qm7wl02.jpg";
        File file = new File(path);

        response.setContentType("image/*");

        FileCopyUtils.copy(new FileInputStream(file), outStream);


        outStream.flush();
        outStream.close();
    }

效果如图