spring 3上传了很多文件

Question

是的,我们的客户想要上传多个文件.我们使用春天3 mvc.像这样的官方例子:

标记:

<form method="post" action="/form" enctype="multipart/form-data">
    <input type="text" name="name"/>
    <input type="file" name="file"/>
    <input type="submit"/>
</form>

码:

@RequestMapping(value = "/form", method = RequestMethod.POST)
public String handleFormUpload(@RequestParam("name") String name,
                               @RequestParam("file") MultipartFile file) {

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

        // store the bytes somewhere
        return "redirect:uploadSuccess";
    } else {
        return "redirect:uploadFailure";
    }
}

只有一个文件,所以我可以在方法中写入文件输入名称.但如果我想上传很多文件,我该怎么办？我无法写入所有文件输入名称,因为如果是由js代码生成的.我只知道它的名字就像'attach_'那样,我应该在方法中写什么？如果我这样写

@RequestParam() MultipartFile file

要么

@RequestParam("attach_") MultipartFile file

我会收到一个错误.

Answer 1

我使用Spring 3.0.4(在以前的Spring版本中存在问题,所以一定要使用> = 3.0.4).

要测试它,您可以使用以下步骤:

public class MultiPartFileUploadBean {

    private List<MultipartFile> files;

    public void setFiles(List<MultipartFile> files) {
        this.files = files;
    }

    public List<MultipartFile> getFiles() {
        return files;
    }
}

控制器:

@RequestMapping(value = "/uploadtest", method = RequestMethod.POST)
public String uploadtestProcess(MultiPartFileUploadBean file, BindingResult bindingResult,
        Model model) throws IOException {
    ... // binding check
    StringBuilder sb = new StringBuilder();
    List<MultipartFile> files = file.getFiles();
    for(MultipartFile f:files)
        sb.append(String.format("File: %s, contains: %s<br/>\n",f.getOriginalFilename(),new String(f.getBytes())));
    String content = sb.toString();
    model.addAttribute("content", content);
    return "uploadtest";
}

jsp:

<form method="post" action="/uploadtest" enctype="multipart/form-data">
<p>Type: <input type="text" name="type" value="multiPartFileSingle" size="60" /></p>
<p>File 1: <input type="file" name="files[0]" size="60" /></p>
<p>File 2: <input type="file" name="files[1]" size="60" /></p>
<p><input type="submit" value="Upload" /></p>
</form>
<c:if test="${not empty content}">
<p>The content uploaded: <br/>${content}</p>

Answer 2

一种更简单的方式 - 对我有用

/*** Upload Images ***/
@RequestMapping(value = "/images/upload", method = RequestMethod.POST)
public void upload(@RequestParam("file") List<MultipartFile> files, @RequestParam("user") String user) {

    files.forEach((file -> System.out.println(file.getOriginalFilename())));

}

Answer 3

你可以在这里找到它：

http://dhruba.name/2008/12/27/implementing-single-and-multiple-file-multipart-uploads-using-spring-25/