SpringBoot使用RestTemplate如何通过http请求将文件下载到本地

public static void downloadFile(String url, HttpHeaders headers, RequestParams requestParams, String outputPath) throws IOException {


        // 创建请求实体
        HttpEntity<RequestParams> entity = new HttpEntity<>(requestParams, headers);
        // 初始化RestTemplate，也可以自己构建配置类。
        final RestTemplate restTemplate = new RestTemplate();
        // 请求配置
        ResponseEntity<Resource> response = restTemplate.exchange(
                URI.create(url),
                HttpMethod.POST,
                entity,
                Resource.class
        );

        // 请求成功校验
        if (response.getStatusCode().is2xxSuccessful() && response.getBody() != null) {
            // 获取资源
            Resource resource = response.getBody();

            // 确保目录存在
            File outputFile = new File(outputPath);
            File parentDir = outputFile.getParentFile();
            // 文件存在校验
            if (parentDir != null && !parentDir.exists()) {
                if (!parentDir.mkdirs()) {
                    throw new IOException("Failed to create directory: " + parentDir);
                }
            }
            //获取流
            try (InputStream inputStream = resource.getInputStream();
                 OutputStream outputStream = Files.newOutputStream(outputFile.toPath())) {
                StreamUtils.copy(inputStream, outputStream);
            }
        } else {
            throw new IOException("Failed to download file: " + response.getStatusCode());
        }
    }

@Data
public class RequestParams implements Serializable {
    private Long id;
}

    public static void downloadPerPaper(PaperInfo paperInfos) throws IOException {
		//url
        String url="https://xxxx.com";
        //请求头
        HttpHeaders headers = new HttpHeaders();
        headers.set("xxx","xxxxx");
        //请求参数
        final RequestParams requestParams = new RequestParams();
        requestParams.setId(1L);
        //存在存放地址
        String path="xx/xx/xx.doc";
        //调用下载方法
        downloadFile(url,headers,requestParams,path);
    }