使用SpringBoot的Multipartfile进行传输文件

1.使用SpringBoot自带的MutilepartFile

2.代码如下:
前端:

<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>文件上传</title>
</head>
<body>
<h3>文件上传</h3>
<form th:action="@{/upload/document}" method="post" enctype="multipart/form-data">
    选择文件:<input type="file" name="file">
    <input type="submit" value="上传">
</form>
</body>

</html>

后端Controller层:
@RequestParam(“file”) 表明file应该跟前端的name相同.
file.transferTo(realPath)一定要用try-catch包起来,不然传入到对应的文件夹中,否则只会传输到最前的父文件夹下.

@RequestMapping("/document")
    @ResponseBody
    public void uploadDocument(HttpServletRequest request,@RequestParam("file") MultipartFile file) throws IOException {
        String filename= file.getOriginalFilename();
        //进行获取后缀名
        String subFilename= filename.substring(filename.lastIndexOf("."));
        File filePath=new File("E:\\huang\\");
        if (!filePath.exists()){
            filePath.mkdir();
        }

        String realFilename=UUID.randomUUID()+subFilename;
        File realPath=new File(filePath+realFilename);
        try{
            file.transferTo(realPath);
        }catch (Exception e){
            e.printStackTrace();
        }

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