springboot读取war包下图片并展示到浏览器

@RequestMapping("/photo")
public void photo(HttpServletResponse response) throws IOException {
    String url = "/Users/amanda/Desktop/test.war";
    String path = "demo.jpg";
    String filePath = url;
    JarFile jarFile = null;
    try {
        jarFile = new JarFile(new File(filePath));
    } catch (IOException e) {
        e.printStackTrace();
    }
    Enumeration<JarEntry> entries = jarFile.entries();
    InputStream inptStrm = null;
    ServletOutputStream outputStream = null;
    while (entries.hasMoreElements()) {
        System.out.println(path);
        JarEntry nextElement = entries.nextElement();
        if(nextElement.getName().indexOf(path)>-1){
            inptStrm = jarFile.getInputStream(nextElement);
            response.setContentType("image/png");
            outputStream = response.getOutputStream();

            int len;
            byte[] buffer = new byte[4096];
            while ((len = inptStrm.read(buffer)) != -1)
            {
                outputStream.write(buffer, 0, len);
            }
            outputStream.flush();
        }
    }
    outputStream.close();
    inptStrm.close();
}