SpringBoot將圖片/文件傳至前端

• • 1. 返回OutputStream
  • 2. 返回base64格式

1. 返回OutputStream

@GetMapping("/download")public String download (HttpServletResponse response) {File file = new File("");byte[] bytes = new byte[1024];try (OutputStream os = response.getOutputStream();FileInputStream fis = new FileInputStream(file)){while ((fis.read(bytes)) != -1) {os.write(bytes);os.flush();}} catch (IOException e) {e.printStackTrace();}return "success";}

2. 返回base64格式

@GetMapping("/base64")public String getBase64() {byte[] data = null;String dataStr = null;final Response picture = feignServer.getBase64();Response.Body body = picture.body();try (InputStream is = body.asInputStream()){data = is.readAllBytes();} catch (IOException e) {e.printStackTrace();}dataStr = Base64.encodeBase64String(data);return dataStr;}

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