java后台调用下载文件接口获取文件名文件流并且下载文件_java 后台获取导出的文件流

       JSONObject datatokenJson = new JSONObject();//data域
       datatokenJson.put("gridFsId", "607f90ab0e72467a7bd1328b");
       String jsonStr = JSONObject.toJSONString(datatokenJson);                
        CloseableHttpClient httpClient = HttpClients.createDefault();
        HttpPost post = new HttpPost("http://192.168.28.130:8080/supportingPlatformTygn/unstructured/download/gridFsId");
        StringEntity postEntity = new StringEntity(jsonStr, "UTF-8");
        post.setEntity(postEntity);
        //设置消息头
        post.setHeader(new BasicHeader("Content-Type", "application/json"));
        post.setHeader(new BasicHeader("Accept", "application/json"));
        post.setHeader(new BasicHeader("apptoken", "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJqdGkiOiI1ODQ0NTIxYy0xZjA5LTRkODctODA0Mi0zMWI2ODc5YzQyY2MiLCJpYXQiOjE2MTc3ODM0MjgsImlzcyI6InVzZXIiLCJ1c2VySWQiOiI0MDI4ODMzMTc1NGEyYTc1M
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