java在Spring4和thymeleaf中作为表单的一部分上传文件

Question

我必须创建公司，其中一个必填字段是公司徽标。我创建了以下表单：

@NotNull
@Size(min = 2, max = 256, message = "{validation.length}")
private String name;

@Size(min = 6, max = 32, message = "{validation.length}")
private String companyId;

@NotNull
private String country;

@NotNull
private String city;

@NotNull
private String state;

@NotNull
private String postalCode;

@NotNull
private String address1;

private String address2;

@NotNull
private String phone1;

private String phone2;

private String fax;

@Email(message = "{validation.invalidChars}")
private String email;

private String website;

private MultipartFile companyLogo;

private boolean status;

我想做的是创建公司并上传公司徽标作为表单的一部分，这是我的thymeleaf表单

<form action="#" th:object="${createCompanyForm}" method="post" id="save">

<input type="text" name="name" th:field="*{name}" th:value="${createCompanyForm.name}" th:class="form-control" data-rule-required="true"/>

<input type="text" name="companyId" th:field="*{companyId}" th:value="${createCompanyForm.companyId}" />

<input type="file" name="companyLogo" id="logo" th:field="*{companyLogo}" th:value="${createCompanyForm.companyLogo}"/>

</form>

此表单是通过jquery函数提交的

function save() {
        var formData = $('#save').serializeArray();        
        $.ajax({
            url : "create",
            type: "POST",
            timeout:5000,
            data: formData,
            contentType: 'application/x-www-form-urlencoded',
            cache: false,
            success:function(response){
                alert(response.message);
            },
            error: function(response){
                alert(response.message);
            }
        });
    };

这是我的ajax控制器

@RequestMapping(
            value = "/create",
            method = RequestMethod.POST,
            consumes = "application/x-www-form-urlencoded",
            produces = "application/json")
    @ResponseBody
    public JsonFormResponse<String> postCreateCompany(@Valid CreateCompanyForm form, BindingResult result,
            Locale locale, HttpSession session)
    {
        JsonFormResponse<String> response = new JsonFormResponse<>();
        String message;

        if (result.hasErrors())
        {
            message = getLocalizedMessage(FLASH_CREATE_COMPANY_ERROR, null, locale);
            response.setMessage(message);
            response.setErrors(result);
            response.setStatus(JsonResponseStatus.ERROR);
            return response;

        }

        try
        {
            String filename = form.getCompanyLogo().getOriginalFilename();
            Company company = getCompanyService().create(getCurrentUser(session), form);

            if (company == null) { throw new Exception("Error creating the company."); }
            User user = getCurrentUser();
            user.getCompanies().add(company);
            getUserService().update(user);
            message = getLocalizedMessage(FLASH_CREATE_COMPANY_SUCCESS, new String[]
            {
                    form.getName()
            }, locale);
            response.setMessage(message);
            response.setStatus(JsonResponseStatus.OK);
            return response;
        }
        catch (Exception ex)
        {
            LOGGER.error(ex.getMessage(), ex);

            message = getLocalizedMessage(FLASH_CREATE_COMPANY_ERROR, null, locale);
            response.setMessage(message);
            response.setErrors(result);
            response.setStatus(JsonResponseStatus.ERROR);
            return response;
        }
    }

正如您所看到的，我正在使用contentType:“application/x-www-form-urlencoded”，我尝试使用多部分/表单数据作为内容类型，但出现以下错误：

Caused by: org.apache.commons.fileupload.FileUploadException: the request was rejected because no multipart boundary was found

我已经在servlet上下文中添加了多部分配置。xml:

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"
        p:maxUploadSize="5242880" />

但我还是有例外

有人知道我错过了什么吗？，或者是否有人知道在哪里可以找到作为表单一部分上载文件的示例，我已经找到了很多示例，但是只有一个字段文件字段。我真的很感激你给我的建议