关于文件上传

	public static void upload(String strPath, ServletConfig config,
			HttpServletRequest request, HttpServletResponse response) {
		File dir = new File(strPath);
		String w = JdjWsxydUpload.getFilesRecursive(dir);
		if (w.equals("ligang")) {
		} else {
			strPath += "/" + w;
			File fileDir = new File(strPath);
			if (fileDir.exists()) {
				System.out.println("删除文件信息成功！！！");
				fileDir.delete();
			}
		}
		SmartUpload su = new SmartUpload();
		try {
			su.initialize(config, request, response);
			su.upload();
			for (int i = 0; i < su.getFiles().getCount(); i++) {
				com.jspsmart.upload.File file = su.getFiles().getFile(i);
				// 若文件不存在则继续
				if (file.isMissing())
					continue;
				// 将文件另存
				file
						.saveAs("/webgroup/jdj/wsxyd/"
								+ JdjWsxydUpload.getOneName() + "."
								+ file.getFileExt());
			}
		} catch (SmartUploadException e) {
			e.printStackTrace();
		} catch (Exception e) {
			e.printStackTrace();

		}
	}

	private static String getOneName() {
		String name = "";
		name = "wsxyd" + System.currentTimeMillis();
		return name;
	}

	public static String getFilesRecursive(File dir) {
		if (dir.isDirectory()) {
			String sub[] = dir.list();
			if (sub.length > 0) {
				return sub[0];
			} else {
				return "ligang";
			}
		} else {
			return "ligang";
		}
	}
	
	public static void main(String[] args){
		File dir = new File("C:/windows/Help");
		String w = JdjWsxydUpload.getFilesRecursive(dir);
		System.out.println(w);
	}

Help文件夹下有Corporate等文件夹，所以dir.list()返回的是Help文件夹下的文件夹名字的列表