springboot获取src/main/resource下的文件

问题如下：

 

maven构建的springboot工程下的，文件路径


 

希望web端能够下载这里的“assess_remplate.docx”文件。

 

解决：

 

1、通过resource获取到文件

 

 

ClassPathResource resource = new ClassPathResource("docs/assess_template.docx");
		File file = resource.getFile();

 

2、但是springboot工程打成jar包后，file是无法从jar包内的路径拿到的。程序会抛出异常：

 

 

3、改用输入流去获取。

 

 

ClassPathResource resource = new ClassPathResource("docs/assess_template.docx");
		InputStream inputStream = resource.getInputStream();

 

 

4、然后需要将字节流转为字节数组。通过ResponseEntity<byte[]>返回到web端。

 

 

@GetMapping("/assess_template")
	public ResponseEntity<byte[]> download(HttpServletResponse response) throws Exception {
		ClassPathResource resource = new ClassPathResource("docs/assess_template.docx");
		InputStream inputStream = resource.getInputStream();
		ByteArrayOutputStream swapStream = new ByteArrayOutputStream();
		byte[] buff = new byte[100];
		int rc = 0;
		while ((rc = inputStream.read(buff, 0, 100)) > 0) {
			swapStream.write(buff, 0, rc);
		}
		byte[] in2b = swapStream.toByteArray();
		HttpHeaders headers = new HttpHeaders();
		String downloadFielName = new String("assess_template.docx".getBytes("UTF-8"), "iso-8859-1");
		headers.setContentDispositionFormData("attachment", downloadFielName);
		headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
		return new ResponseEntity<byte[]>(in2b, headers, HttpStatus.CREATED);
	}

 

 

 

 

 参考链接：https://www.cnblogs.com/Jeremy2001/p/6339945.html