pass encode JSON from Java to Javascript , JSON character encoding

Map / HashMap / get Key, get value by key

Set / HashSet / List / ArrayList / infinite for (for(;;)) and break

show multi language in JSP using properties and fmt:message

convert java new date to jstl fmt:formatDate / convert currency using fmt:formatNumber, pattern

jstl c:remove / c:set

jstl c:if / c:when / c:otherwise / c:foreach

implicit object in JSP, get c:out / c:if value from pageContext setAttribute / jstl

출처 :  http://hyeonstorage.tistory.com/78   JSP 페이지의 내장 객체  내장 객체 리턴 타입(Return Type)  설명  request  javax.servlet.http.Htt...

check if variable is Integer

JPA, Java Persistance API, communicate with JDBC and implementation APIs (like Hibernate...)

Send Mail using Google SMTP in Java

Send Map from Spring Controller to Javascript via ModelAndView

Round number ( ceil, floor) using Math, attach String using Append in Java

Decimal , Currency , Message format pattern in Java

get milisecond time by using getTime(), subtract between two dates.

Multiple data format using SimpleDateFormat (set date as yyyy-mm-dd in Java)

Arrays.sort with Comparator. Sort Number by Ascending or Descending order in Java

put Class Object into Array in Java, multiple objects in array

Java Basic String API (charAt, indexOf, toUppserCase, trim, substring, split)

Get JSONObject Data from URL in Java