依赖: 

<dependency>
			<groupId>commons-io</groupId>
			<artifactId>commons-io</artifactId>
			<version>2.2</version>
		</dependency>

 

保存:

{


        String name1x=System.currentTimeMillis()+"";
        String path="D:/uuuuuuuuu";
        saveFile(file,path,"pic",name1x);

};



 private boolean saveFile(MultipartFile file, String path , String type ,String pre) {
        // 判断文件是否为空
        if (!file.isEmpty()) {
            try {      
                File filepath = new File(path+"/"+type);
                if (!filepath.exists()) {
                    filepath.mkdirs();
                }
                // 文件保存路径
                String savePath = path +"/"+ type +"/"+ pre + file.getOriginalFilename();
                // 转存文件
                //file.transferTo(new File(savePath));
                //复制
                FileUtils.copyInputStreamToFile(file.getInputStream(),new File(savePath));

                return true;
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return false;
    }

删除:

String URL="D:/upload/xxx.txt";  

File file=new File(URL);
if(file.exists()&&file.isFile()) {
     file.delete();
}

代码自用