春季MVC多个文件上传 [英] spring MVC multiple files upload

问题描述

我正在使用Spring MVC和JSP.我想上传2个文件，问题是只有一个文件正在上传.下面是代码:

I'm using spring MVC and JSP. I want to upload 2 files, issue is only one file is getting uploaded. Below is the code:

<form id="myform" name="myform" action="/createRequest.htm" enctype="multipart/form-data" method="POST">
//form elements like textbox, checkbox
    <tr>
        <th class="RelReqstAllign"></th><td> (Or)<input type="file" name="fileUpload" size="50"/></td>
    </tr>
    <tr>
        <th class="RelReqstAllign"></th><td><input type="file" name="fileUpload" size="50" /></td>
    </tr>
</form>

下面是弹簧控制器代码:

Below is the spring controller code:

@RequestMapping(value = "/createRequest", method = RequestMethod.POST)
public ModelAndView createRequest(final HttpServletRequest request,
        final HttpServletResponse response,
        final @ModelAttribute("spRequestDTO") SPRequestDTO dto,
        final BindingResult beException,
        final @RequestParam("buttonName") String buttonName,
        @RequestParam CommonsMultipartFile[] fileUpload) throws IOException {
    if (fileUpload != null && fileUpload.length > 0) {
        for (CommonsMultipartFile aFile : fileUpload) {

            System.out.println("Saving file: "
                    + aFile.getOriginalFilename());

            if (!aFile.getOriginalFilename().equals("")) {
                try {
                    aFile.transferTo(new File(saveDirectory + aFile.getOriginalFilename()));
                } catch (IllegalStateException e) {

                    e.printStackTrace();
                } catch (IOException e) {

                    e.printStackTrace();
                }
            }
        }
    }
}

调试控制器时，即使上传两个文件，fileUpload也仅显示一个文件.

When I debug the controller, fileUpload is showing only one file, even when I upload two files.

下面是在Spring-mvc.xml中添加的代码

Below is the code added in Spring-mvc.xml

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

推荐答案

就是这样.您无需在表单中使用超过input标记即可选择多个文件

Just do like this. you dont need to have more than input tag in your form to select multiple files

  <input type="file" name="fileUpload" size="50" multiple/>    

通过单击键盘上的ctrl选项，用户可以在系统中选择多个文件.

It will allow users to select multiple files in their sytem by clicking ctrl option in keyboard.

然后，在您的动作课中，根据需要进行操作.

And then, in your action class, do your stuff as you wanted.

确保fileUpload变量作为bean类中的文件数组

Make sure fileUpload variable as file array in your bean class

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