No FileItemFactory has been set

错误描述： No FileItemFactory has been set

代码：

//创建上传文件工厂
		DiskFileItemFactory factory = new DiskFileItemFactory();
		//设置内存中缓存区的大小，默认10K
		factory.setSizeThreshold(100*1024);
		//设置临时和真实目录
		String tempPath= this.getServletContext().getRealPath("/temp");
		String uploadPath= this.getServletContext().getRealPath("/upload");
		factory.setRepository(new File(tempPath));
		//创建上传文件对象
		ServletFileUpload upload = new ServletFileUpload();

解决办法：

需要把factory 传到  ServletFileUpload 中

 即

	ServletFileUpload upload = new ServletFileUpload(factory );