springboot使用http发起远程服务调用，请求参数包含StandardMultipartHttpServletRequest

本文链接：https://blog.youkuaiyun.com/CodersCoder/article/details/130409594

文章介绍了在遇到Feign不支持StandardMultipartHttpServletRequest时，如何转换为HTTPPOST请求进行远程服务调用。服务提供方使用@PostMapping接收参数，而服务调用方通过HttpPost、MultipartEntityBuilder构建并发送包含文件的多部分表单数据请求，成功实现了调用。

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背景

项目一般的远程服务调用使用feign，由于feign调用对于StandardMultipartHttpServletRequest支持不是很友好，所以需要将其改造为rest或者是http，相比与rest，http更为友好。

服务提供方

    @PostMapping("/updateInfo")
    @NonNull
    public TransResult updateInfo(@RequestParam("Id") String Id,
                                         @RequestParam("info") String info, String language,
                                          StandardMultipartHttpServletRequest request) {
	//.................
	
}

服务调用方

@RequestMapping("updateInfo")
    public GlobalResponse updateInfo(@RequestParam("Id") String Id,@RequestParam("info") String info,@RequestParam("file") MultipartFile file) throws IOException {

        //定义post请求
        HttpPost post = new HttpPost(path + "/xxx/api/updateInfo");
        CloseableHttpClient httpClient = HttpClients.createDefault();
        CloseableHttpResponse response = null;
        RequestConfig config = RequestConfig.custom().setConnectTimeout(30000).setSocketTimeout(30000).build();
        String result = "";
        //构建请求
        MultipartEntityBuilder builder = MultipartEntityBuilder.create();
        builder.setMode(HttpMultipartMode.RFC6532);
        builder.setContentType(ContentType.MULTIPART_FORM_DATA);
        if (file != null) {
            builder.addBinaryBody("file",new FileInputStream(multipartFileToFile(file)),ContentType.DEFAULT_BINARY,file.getOriginalFilename());
        }
        builder.addTextBody("Id", Id,ContentType.create(HTTP.PLAIN_TEXT_TYPE,HTTP.UTF_8));
        builder.addTextBody("info",info, ContentType.create(HTTP.PLAIN_TEXT_TYPE,HTTP.UTF_8));
        builder.addTextBody("language","zh", ContentType.create(HTTP.PLAIN_TEXT_TYPE,HTTP.UTF_8));
        post.setConfig(config);
        post.setEntity(builder.build());
        //执行请求
        response = httpClient.execute(post);
        HttpEntity entity = response.getEntity();
        result = httpEntityToString(entity);
        JSONObject json = JSON.parseObject(result);
        JSONObject data =  JSON.parseObject(json.getString("data"));
        return GlobalResponse.success(data);
    }

完美解决调用问题。