SpringBoot下载resource目录下的资源文件

通过ClassPathResource加载文件所在的具体路径，然后通过getFile()获取到文件的输入流将输入流copy到输出流中，实现文件流的下载操作。

具体代码如下：

@RestController@RequestMappingpublic class Controller {    @GetMapping("/test")    public void download(HttpServletResponse response) { FileInputStream fis = null; ServletOutputStream sos = null; try {     String fileName = "test.docx";     // resources下路径，比如文件位置在：resources/file/test.docx     String path = "file/" + fileName;     //设置响应头     response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));     ClassPathResource classPathResource = new ClassPathResource(path);     fis = new FileInputStream(classPathResource.getFile());     sos = response.getOutputStream();     IOUtils.copy(fis, sos); } catch (Exception e) {     e.printStackTrace();     throw new RuntimeException("下载失败！"); } finally {     try {  if (fis != null) {      fis.close();  }  if (sos != null) {      sos.flush();      sos.close();  }     } catch (IOException e) {  e.printStackTrace();     } }    }}