[jstl] 앞에 숫자 붙이기

https://hhhye.wordpress.com/2016/12/09/jstl-%ED%95%9C%EC%9E%90%EB%A6%AC-%EC%88%AB%EC%9E%90-%EC%95%9E%EC%97%90-0%EB%B6%99%EC%9D%B4%EA%B8%B0/