spring 上传文件

public class UploadController {

    //设置文件的路径
    File filePath = new File("D:/workspace-letter");
    
    @RequestMapping(value = "/upload", method = RequestMethod.POST)
    @ResponseBody
    //可以成功调取
    public String upload(@RequestParam  MultipartFile file) throws IOException {
        
        //获取文件原始名称
        String filename = file.getOriginalFilename();
        //获取文件扩展名
        String fileExtension = filename.substring(filename.lastIndexOf("."));
        //img  文件名前缀
        File tempFile = File.createTempFile("img", fileExtension,filePath);

        try{
            InputStream in = file.getInputStream();
            OutputStream out = new FileOutputStream(tempFile);
            IOUtils.copy(in, out);
        }catch(Exception e){
            e.printStackTrace();
        }
        return filename;
    }
}

@Controller
public class UploadController {
    @RequestMapping(value = "/upload", method = RequestMethod.POST)
    @ResponseBody
    public String upload(@RequestParam  MultipartFile file, HttpServletRequest request) throws IOException {
                //设置服务器的上传路径
        File filePath = new File("//sharedata//p4");
        
        String filename = file.getOriginalFilename();
        String fileExtension = filename.substring(filename.lastIndexOf("."));
        File tempFile = File.createTempFile("LETTER", fileExtension,filePath);

        try {
            InputStream in = file.getInputStream();
            OutputStream out = new FileOutputStream(tempFile);
            IOUtils.copy(in, out);
        } catch (Exception e) { 
            e.printStackTrace();
        }
        return filePath.getPath() + "/" + filename;
    }

}