java 得到项目的根目录的绝对路径

java 得到项目的根目录的绝对路径

 public static String getPath(HttpServletRequest request){
	        String sysPath = request.getServletContext().getRealPath("/");
	        sysPath = sysPath.replaceAll("\\\\", "/");
	        String[] str=sysPath.split("/");
	        StringBuffer sb =new StringBuffer();
	        for(int i = 0; i < str.length-1;i++){
	        	sb.append(str[i]+"/");
	        }
          return sb.toString();
	}