请求接口去请求别人的文件并下载 – Hutool解决方案

    public void XXXX(HttpServletResponse httpServletResponse) {
        // 请求目标资源
        HttpRequest post = HttpUtil.createPost(URL);
        //post.header(Header.CONTENT_TYPE, "application/json");
        //post.addHeaders(headMap);
        //post.body(JSONUtil.toJsonStr(searchParam));
        // 获取发送请求后的响应对象
        HttpResponse execute = post.timeout(20000).execute();

        // try代码块写入响应内容即可！
        try {
            // 设置响应类型
            httpServletResponse.setContentType("application/vnd.ms-excel;charset=utf-8");
            // 设置响应输出流
            OutputStream out = httpServletResponse.getOutputStream();
            // 写入内容
            long l = execute.writeBody(out, false, null);
            // 执行写入 刷新此输出流并强制写入任何缓冲的输出字节
            out.flush();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
}