Extjs Struts2文件上傳

struts action 輸入流的方式：

public String savePictures() throws Exception {
		String newFileName = null;
		BufferedOutputStream bos = null;
		BufferedInputStream bis = null;
		String reInfo = "";// 上传成功返回的东西
		for (int i = 0; i < pictureFile.size(); i++) {
			long now = new Date().getTime();
			int index = pictureFileFileName.get(i).lastIndexOf('.');
			String path = ServletActionContext.getServletContext().getRealPath(
					"a");
			File dir = new File(path);
			if (!dir.exists())
				dir.mkdir();// 创建个文件夹
			if (index != -1) {
				newFileName = pictureFileFileName.get(i).substring(0, index)
						+ "-" + now
						+ pictureFileFileName.get(i).substring(index);// 生成新文件名
			} else {
				newFileName = pictureFileFileName.get(i) + "-" + now;
			}
			reInfo += newFileName + "@";
			bos = null;
			bis = null;
			try {
				FileInputStream fis = new FileInputStream(pictureFile.get(i)); // /////////
				bis = new BufferedInputStream(fis);
				FileOutputStream fos = new FileOutputStream(new File(dir,
						newFileName));
				bos = new BufferedOutputStream(fos);
				byte[] buf = new byte[4096];
				int len = -1;
				while ((len = bis.read(buf)) != -1) {
					bos.write(buf, 0, len);
				}
			} catch (Exception e) {
				try {
					String msg = "{success:false,errors:{name:'上传错误'}}";
					response.getWriter().write(msg);
				} catch (IOException e1) {
					e1.printStackTrace();
				}
			} finally {
				try {
					if (null != bis)
						bis.close();
				} catch (IOException e) {
					e.printStackTrace();
				}

				try {
					if (null != bos)
						bos.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		response.setContentType("text/html;charset=UTF-8");
		response.setHeader("Cache", "no-cache");
		PrintWriter out = null;
		try {
			out = response.getWriter();
			out.write("{success:true}");
		} catch (Exception e) {
			Log4JFactory.instance().error(Util.SITE_LOG +" savePictures failed", e);
		}finally {
			if (out != null) {
				out.close();
			}
		}
		return SUCCESS;
	}

 或者是：包裝方法

public String uploadfiles() {
		// 定义保存的路径
		String savepath = getSavePath();
		// 根据路径创建文件路径对象
		File file = new File(savepath);
		if (!file.exists()) {
			file.mkdirs();
		}
		try {
			for (int i = 0; i < pic.length; i++) {
				FileUtils.copyFile(pic[i], new File(file, getPicFileName()[i]));
			}
		} catch (Exception ex) {
			ex.printStackTrace();
		}
		return "SUCCESS";

	}