带有JSON的Spring MVC分段请求 [英] Spring MVC Multipart Request with JSON

问题描述

我想使用Spring MVC发布带有一些JSON数据的文件.所以我开发了一个休息服务，

I want to post a file with some JSON data using Spring MVC. So I've developed a rest service as

@RequestMapping(value = "/servicegenerator/wsdl", method = RequestMethod.POST,consumes = { "multipart/mixed", "multipart/form-data" })
@ResponseBody
public String generateWSDLService(@RequestPart("meta-data") WSDLInfo wsdlInfo,@RequestPart("file") MultipartFile file) throws WSDLException, IOException,
        JAXBException, ParserConfigurationException, SAXException, TransformerException {
    return handleWSDL(wsdlInfo,file);
}

当我从其他客户端发送请求时， content-Type = multipart/form-data or multipart/mixed，我得到下一个异常: org.springframework.web.multipart.support.MissingServletRequestPartException

When I send a request from the rest client with content-Type = multipart/form-data or multipart/mixed, I get the next exception: org.springframework.web.multipart.support.MissingServletRequestPartException

有人可以帮助我解决这个问题吗?

Can anyone help me in solving this issue?

我可以使用@RequestPart将Multipart和JSON发送到服务器吗?

Can I use @RequestPart to send both Multipart and JSON to a server?

推荐答案

这就是我使用JSON数据实现Spring MVC Multipart Request的方式.

This is how I implemented Spring MVC Multipart Request with JSON Data.

基于Spring 4.0.2版本中的RESTful服务，可以使用@RequestPart实现HTTP请求，其中第一部分为XML或JSON格式的数据，第二部分为文件.下面是示例实现.

Based on RESTful service in Spring 4.0.2 Release, HTTP request with the first part as XML or JSON formatted data and the second part as a file can be achieved with @RequestPart. Below is the sample implementation.

Controller中的其余服务将混合使用@RequestPart和MultipartFile来满足此类Multipart + JSON请求.

Rest service in Controller will have mixed @RequestPart and MultipartFile to serve such Multipart + JSON request.

@RequestMapping(value = "/executesampleservice", method = RequestMethod.POST,
    consumes = {"multipart/form-data"})
@ResponseBody
public boolean executeSampleService(
        @RequestPart("properties") @Valid ConnectionProperties properties,
        @RequestPart("file") @Valid @NotNull @NotBlank MultipartFile file) {
    return projectService.executeSampleService(properties, file);
}

前端(JavaScript)代码段:

1. 创建一个FormData对象.

1. Create a FormData object.

使用以下步骤之一将文件追加到FormData对象.

Append the file to the FormData object using one of the below steps.

1. 如果已使用文件"类型的输入元素上传了文件，则将其附加到FormData对象. formData.append("file", document.forms[formName].file.files[0]);
2. 将文件直接附加到FormData对象. formData.append("file", myFile, "myfile.txt");或formData.append("file", myBob, "myfile.txt");

1. If the file has been uploaded using an input element of type "file", then append it to the FormData object. formData.append("file", document.forms[formName].file.files[0]);
2. Directly append the file to the FormData object. formData.append("file", myFile, "myfile.txt"); OR formData.append("file", myBob, "myfile.txt");

使用字符串化的JSON数据创建一个blob，并将其附加到FormData对象.这将导致multipart请求中第二部分的Content-type成为"application/json"，而不是文件类型.

Create a blob with the stringified JSON data and append it to the FormData object. This causes the Content-type of the second part in the multipart request to be "application/json" instead of the file type.

将请求发送到服务器.

请求详细信息:
Content-Type: undefined.这将导致浏览器将Content-Type设置为multipart/form-data并正确填充边界.手动将Content-Type设置为multipart/form-data将无法填写请求的边界参数.

Request Details:
Content-Type: undefined. This causes the browser to set the Content-Type to multipart/form-data and fill the boundary correctly. Manually setting Content-Type to multipart/form-data will fail to fill in the boundary parameter of the request.

Javascript代码:

formData = new FormData();

formData.append("file", document.forms[formName].file.files[0]);
formData.append('properties', new Blob([JSON.stringify({
                "name": "root",
                "password": "root"                    
            })], {
                type: "application/json"
            }));

请求详细信息:

method: "POST",
headers: {
         "Content-Type": undefined
  },
data: formData

请求有效载荷:

Accept:application/json, text/plain, */*
Content-Type:multipart/form-data; boundary=----WebKitFormBoundaryEBoJzS3HQ4PgE1QB

------WebKitFormBoundaryvijcWI2ZrZQ8xEBN
Content-Disposition: form-data; name="file"; filename="myfile.txt"
Content-Type: application/txt


------WebKitFormBoundaryvijcWI2ZrZQ8xEBN
Content-Disposition: form-data; name="properties"; filename="blob"
Content-Type: application/json


------WebKitFormBoundaryvijcWI2ZrZQ8xEBN--

这篇关于带有JSON的Spring MVC分段请求的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！