spring mvc文件上传-优快云博客

本文详细介绍了如何通过HTTP请求实现文件上传，并利用MultipartFile处理上传的文件数据，进一步通过CommonsMultipartResolver解析请求，获取文件信息。重点阐述了图片上传流程，包括文件路径的确定、文件存储位置的设定、文件名的生成以及最终返回图片地址的过程。

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@RequestMapping("public/upload")
public void upload(HttpServletRequest request,HttpServletResponse response) throws IOException {
MultipartResolver resolver = new CommonsMultipartResolver(request
.getSession().getServletContext());

MultipartHttpServletRequest multipartRequest = resolver
.resolveMultipart(request);
Map<String, MultipartFile> fileMap = multipartRequest.getFileMap();
MultipartFile multipartFile = null;

for (Map.Entry<String, MultipartFile> set : fileMap.entrySet()) {
String filekey = set.getKey();// Filedata
multipartFile = set.getValue();// 文件名
}
String path = this.storeIOc(multipartRequest, multipartFile);
response.getWriter().write(path);
//return path;
}

// 接受图片，返回图片地址
@SuppressWarnings("deprecation")
private String storeIOc(HttpServletRequest request, MultipartFile file) throws IOException {
//得到项目的保存图片的路径
String webPath = request.getRealPath("/wtpp/upload/images");
Date day = new Date();
String today = DateFormat.getDateInstance(DateFormat.DEFAULT).format(day);
File todayFile = new File(webPath+File.separator+today);
//如果文件夹不存在，创建文件夹，文件夹以日期命名
if(!todayFile.exists()){
todayFile.mkdir();
}

String logImageName = "";
if (file.isEmpty()) {
System.out.println("文件未上传");
} else {
String _fileName = file.getOriginalFilename();
String suffix = _fileName.substring(_fileName.lastIndexOf("."));
// /**使用UUID生成文件名称**/
logImageName = UUID.randomUUID().toString() + suffix;

File restore = new File(todayFile.getAbsolutePath()+File.separator + logImageName);
try {
file.transferTo(restore);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
// 返回图片地址

return today +"/"+ logImageName;
}