java 通用文件上传并保存图片

/**
	 *  通用图片上传
	 */
	public void commonImgUpload(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		response.setContentType("text/xml; charset=utf-8");
		response.setCharacterEncoding("UTF-8");

		PrintWriter pw = response.getWriter();
		String xml = "";

		String imgName = getParam(request, "imgName");
		String imgValue = getParam(request, "imgValue");
		String type = getParam(request, "type");
		String encryptCode = getParam(request, "encryptCode");
		log.debug("图片上传，图片名称：" + imgName + "，上传类型：" + type);
		if (MD5Checker.check(encryptCode, imgName)) {
			try {
				String path = this.getClass().getClassLoader().getResource("").getPath();
				log.info("当前路径：" + path);
				path = path.replace("WEB-INF/classes/", "pictures/" + type + "/");
				log.info("替换后路径：" + path);
				File temp = new File(path);
				if (!temp.isDirectory()) {
					log.info("创建目录path: " + path);
					temp.mkdirs();
				}
				path += imgName;
				log.info("图片全path: " + path);
				FileUtil.saveFile(path, (new BASE64Decoder()).decodeBuffer(imgValue), "UTF-8");
				xml = "success";
				log.info("上传图片：" + path + "成功！");
			} catch (Exception e) {
				log.info("上传图片失败，" + e.getMessage());
				xml = "fail";
			}
		} else {
			xml = "<data><resultCode>" + "09" + "</resultCode>" + "<resultMsg>" + "摘要验证错误" + "</resultMsg>" + "</data>";
		}

		pw.print(xml);
		if (null != pw) {
			pw.close();
		}
	}