获取项目根目录

public static String getRootPath(){
		String rootPath = new BaseUtil().getClass().getResource("/").toString()
				.replace("file:/", "").replace("WEB-INF/classes/", "");
		//获得系统属性
		Properties prop = System.getProperties();
		String osName = prop.getProperty("os.name");
		if(!osName.startsWith("win")&&!osName.startsWith("Win")){
			rootPath = "/"+rootPath;  //好像这句话是考虑linux系统，具体不了解，囧……
		}
		return rootPath;
	}