springboot+thymleaf处理多文件上传

Posted 2020-12-04 lr12339

1thymleaf页面表单

<form method="POST" enctype="multipart/form-data" action="/moreupload">
        <p>文件1：<input type="file" name="file" /></p>
        <p>文件2：<input type="file" name="file" /></p>
        <p>文件3：<input type="file" name="file" /></p>
        <p><input type="submit" value="上传" /></p>
</form>

2写一个controller跳转到页面

@RequestMapping(value = "/moresave")

public String moresave(){
    return  "index2";
}

3写一个controller处理多文件上传

@RequestMapping(value="/moreupload", method= RequestMethod.POST)
@ResponseBody
public String handleFileUpload(HttpServletRequest request){
    List<MultipartFile> files = ((MultipartHttpServletRequest)request).getFiles("file");
    MultipartFile file = null;
    BufferedOutputStream stream = null;
    for (int i =0; i< files.size(); ++i) {
        file = files.get(i);
        if (!file.isEmpty()) {
            try {

                String contentType = file.getContentType();
                String fileName = file.getOriginalFilename();
                System.out.println("fileName-->" + fileName);
                System.out.println("getContentType-->" + contentType);
                String filePath = request.getSession().getServletContext().getRealPath("imgupload/");
                System.out.println("filePath -->"+filePath );
                BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(new FileOutputStream(new File(filePath  + fileName)));
                System.out.println("bufferedOutputStream --->>>"+bufferedOutputStream );
                bufferedOutputStream.write(file.getBytes());
                bufferedOutputStream.flush();
                bufferedOutputStream.close();

            } catch (Exception e) {
                return "You failed to upload " + i + " => " + e.getMessage();
            }
        } else {
            return "You failed to upload " + i + " because the file was empty.";
        }
    }
    return "上传成功";
}

4展示