Question

人。需要有关使用multipart-data发送POST请求的帮助。

我有一个在客户端创建请求的方法。这是：

public void sendMultipart(String cmd , Employee emp) {

    CloseableHttpClient httpClient = HttpClients.createDefault();
    HttpPost uploadFile = new HttpPost(baseUrl + cmd);

    MultipartEntityBuilder builder = MultipartEntityBuilder.create();
    FileBody f = new FileBody(emp.getPhoto());
    try {
    StringBody s = new StringBody(emp.getLogin());
    builder.addPart("name", s);
    builder.addPart("file", f);
    } catch (UnsupportedEncodingException ex) {
        Logger.getLogger(RestTemplateRequester.class.getName()).log(Level.SEVERE, null, ex);
    }
    uploadFile.setHeader("Accept", "application/json");
        uploadFile.setHeader("Content-type", "application/json");
        uploadFile.setHeader("enctype","multipart/form-data");
        uploadFile.setHeader("accept-charset","UTF-8");
    //builder.addTextBody("field1", "yes", ContentType.TEXT_PLAIN);
    //builder.addBinaryBody(emp.getLogin(), emp.getPhoto(), ContentType.MULTIPART_FORM_DATA, "file");
    HttpEntity multipart = builder.build();

    uploadFile.setEntity(multipart);

    try {
        HttpResponse httpResponse =  httpClient.execute(uploadFile);

        int status = httpResponse.getStatusLine().getStatusCode();
        String str = httpResponse.getStatusLine().getReasonPhrase();
    } catch (IOException ex) {
        Logger.getLogger(RestTemplateRequester.class.getName()).log(Level.SEVERE, null, ex);
    }

}

我还有一种方法来处理我服务器端的请求：

@RequestMapping(value = "photo", consumes = "multipart/form-data")
public @ResponseBody
void uploadFileHandler(@RequestParam("name") String name,
        @RequestParam("file") MultipartFile file) {

    if (!file.isEmpty()) {
        try {
            byte[] bytes = file.getBytes();

            // Create the file on server
            File serverFile = new File(name);
            BufferedOutputStream stream = new BufferedOutputStream(
                    new FileOutputStream(serverFile));
            stream.write(bytes);
            stream.close();

        } catch (Exception e) {
             e.getMessage();
        }
    }
}

在我的背景下：

<bean id="multipartResolver"
    class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

     <!-- setting maximum upload size -->
    <property name="maxUploadSize" value="100000" />

</bean>

我现在遇到的问题是408错误＆＃34;请求超时＆＃34;。我的共同目标是 - 将带文件的JSON发送到服务器。我在java中使用Web服务非常环保，所以我遇到了一些麻烦。如果有人可以给我一些建议，那将会很棒。谢谢。

Answer 1

您尝试做的不是上传文件的可接受方式（在JSON中嵌入文件）。此外，您的上传文件处理程序不适合处理JSON，而只能处理多部分文件和名称作为参数。请查看我之前使用Spring MVC Multipart和RestTemplate成功上传文件的q/a。

多部分数据发送获得408状态

1 个答案: