FileUpload实现文件上传

项目背景

前端使用的是layui的方式传过来的form-date数据。当时想做的是可以前端传一个路径，上传的路径保存在这个里面

• 前端代码

<div class="upload_btn">上传文件</div>
layui.use('upload', function() {
	var upload = layui.upload;
	upload.render({
		elem: '.upload_btn',
		url: 'http://' + _RestPath + '/MMBS_SX/resources/resource/management/springUpload2',
		accept: 'file',
		multiple: true,
		size: 5 * 1024,
		data: {
			filePath: function() {
				return $('.folder_navigation a:last-child').attr('data-path');
			}
		},
		done: function(res) {
			loadFileList($('.folder_navigation a:last-child').attr('data-path'));
		}
	});
})

• 后端代码

@RequestMapping(value = "springUpload2", method = RequestMethod.POST)
	public String doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		DiskFileItemFactory f = new DiskFileItemFactory();// 磁盘对象
		String filePath = "";
		f.setRepository(new File("F://temp")); // 设置临时目录
		f.setSizeThreshold(1024 * 8); // 8k的缓冲区,文件大于8K则保存到临时目录
		ServletFileUpload upload = new ServletFileUpload(f);// 声明解析request的对象
		upload.setHeaderEncoding("UTF-8"); // 处理文件名中文
		upload.setFileSizeMax(1024 * 1024 * 5);// 设置每个文件最大为5M
		upload.setSizeMax(1024 * 1024 * 10);// 一共最多能上传10M
		String path = PropertiesConfig.readData("docPath");// 获取文件要保存的目录
		String ss = "";
		InputStream inputStream = null;
		try {
			List<FileItem> list = upload.parseRequest(request);// 解析
			for (FileItem ff : list) {
				if (ff.isFormField()) {
					String ds = ff.
							getString("UTF-8");// 处理中文
					System.err.println("说明是:" + ds);
					filePath = ds;
				} else {
					 ss = ff.getName();
					ss = ss.substring(ss.lastIndexOf("\\") + 1);// 解析文件名
					 inputStream = ff.getInputStream();
				}
			}
			if (StringUtils.contains(filePath, path)) {// 因为我设置一个根目	录，判断传过来的文件路径是否包含根目录
				path = filePath;
			}else {
				path+=filePath;
			}
			FileUtils.copyInputStreamToFile( // 直接使用commons.io.FileUtils
					inputStream, new File(path + "/" + ss));
		} catch (Exception e) {
			return "false";
		}
		return "true";
	}