public JavaClassNameParser(String className){
        if(StringUtils.isBlank(className)){
            throw new InvalidParameterException("className is empty");
        }
        if(!className.contains(".")){
            className = className;
            return;
        }

        this.packageName = className.substring(0,className.lastIndexOf("."));
        this.className = className.substring(className.lastIndexOf(".")+1);
    }