[JSP] JSTL 문법 정리

■ JSTL 문법 정리

<%@ page language="java" isELIgnored="false" contentType="text/html; charset=UTF-8"%>
<%@ taglib prefix="c"   uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<%@ taglib prefix="fn"  uri="http://java.sun.com/jsp/jstl/functions" %> 

<!-- set, out -->
<c:set var="country"  value="china" />
<c:set var="intArray" value="<%=new int[] {1,2,3,4,5}%>" />

<p><c:out value="${country}" default="Korea" escapeXml="true"/></p>

<p>${country}</p>
<p>${intArray[0]}</p>

<!--  if -->
<p>----------  if -----------</p>
<c:set var="login" value="false" />

<c:if test="${!login}">
 <p><a href="/login.ok">로그인</a></p>
</c:if>

<c:if test="${login}">
 <p><a href="/logout.ok">로그아웃</a></p>
</c:if>  
<c:if test="${!empty country}"><p><b>${country}</b></p></c:if>

<!-- choose, when, otherwise  -->
<c:choose>
  <c:when test="${login}">
    <p><a href="/logout.ok">로그아웃</a></p>
  </c:when>
  <c:otherwise>
    <p><a href="/login.ok">로그인</a></p>
  </c:otherwise>
</c:choose>

<!-- forEach 정수 범위내의 반복 -->
<c:forEach var="i" begin="0" end="10" step="2" varStatus="x">
  <p> i = ${i}, i*i = ${i * i} <c:if test="${x.last}">, last = ${i}</c:if> </p>
</c:forEach>

<!-- forEach 컬렉션 범위내의 반복 -->
<%
  java.util.List list = new java.util.ArrayList(); 

  java.util.Map map = new java.util.HashMap();
  map.put("color","red");
  list.add(map);
  
  map = new java.util.HashMap();
  map.put("color","blue");
  list.add(map);
  
  map = new java.util.HashMap();
  map.put("color","green");
  list.add(map);
  
  request.setAttribute("list", list);
%>

<c:forEach var="map" items="${list}" varStatus="x">
  <p> map(${x.index}) = ${map.color}  </p>
      
    ${x.current}<br/> 	<!– 현재 아이템 –>
    ${x.index}<br/>     <!– 0부터의 순서 –>
    ${x.count}<br/>     <!– 1부터의 순서 –>
    ${x.first}<br/>     <!– 현재 루프가 처음인지 반환 –>
    ${x.last}<br/>      <!– 현재 루프가 마지막인지 반환 –>
    ${x.begin}<br/>     <!– 시작값 –>
    ${x.end}<br/>       <!– 끝값 –>
    ${x.step}<br/>      <!– 증가값 –>
</c:forEach>


<!-- forTokens 예 --> 
<b>
<c:forTokens var="color" items="빨|주|노|초|파|남|보" delims="|" varStatus="i" >
     <c:if test="${i.first}">color : </c:if>
     ${color} 
     <c:if test="${!i.last}">,</c:if>
</c:forTokens>
</b>

<!-- remove -->
<c:remove var="country" />
<c:remove var="intArray" />


<!-- Set Locale -->
<fmt:setLocale value="ko_KR" /> 

<!-- formatNumber -->
<p>number  : <fmt:formatNumber value="1234567.89" type="number"/></p>
<p>currency : <fmt:formatNumber value="1234567.89" type="currency" currencySymbol="￦"  /> </p>
<p>percent : <fmt:formatNumber type="percent">0.159</fmt:formatNumber></p>
<p>pattern=".000"    :<fmt:formatNumber value="1234567.1" pattern=".000" /></p>
<p>pattern="#,#00.0#":<fmt:formatNumber value="1234567.891" pattern="#,#00.0#"/></p>

<!-- parseNumber  -->
<p>number  : <fmt:parseNumber value="1,234,567.89" type="number"/></p>
<p>currency : <fmt:parseNumber value="12345abcdef" integerOnly="false" type="number" /></p>

<!-- formatDate -->
<c:set var="now" value="<%= new java.util.Date() %>" />
<p> date full : <fmt:formatDate value="${now}" type="date" dateStyle="full" /></p>
<p> date short : <fmt:formatDate value="${now}" type="date" dateStyle="short" /></p>
<p> time : <fmt:formatDate value="${now}" type="time" /></p>
<p> both full : <fmt:formatDate value="${now}" type="both" dateStyle="full" timeStyle="full" /></p>
<p> pattern 1 : <fmt:formatDate value="${now}" pattern="yyyy-MM-dd aa hh:mm:ss" /></p>
<p> pattern 2 : <fmt:formatDate value="${now}" pattern="yyyy-MM-dd  hh:mm:ss" /></p>

<c:set var="name" value=" Oracle dbms 오라클클럽 "/>
    <p>name: ${fn:replace(name, ' ', '*')}</p>
    <c:set var="name" value="${fn:trim(name)}"/>
    <p>trim name: ${fn:replace(name, ' ', '*')}</p>

    <p>length(name): ${fn:length(name)}</p>
    <p>toUpperCase(name): ${fn:toUpperCase(name)}</p>
    <p>toLowerCase(name): ${fn:toLowerCase(name)}</p>
    <p>substring(name,3,6): ${fn:substring(name,3,6)}</p>
    <p>substringBefore(name,'dbms'): ${fn:substringBefore(name, 'dbms')}</p>
    <p>substringAfter(name,'dbms'): ${fn:substringAfter(name, 'dbms')}</p>
    <p>replace(name, '오라클클럽', 'OracleClub'): ${fn:replace(name, '오라클클럽', 'OracleClub')}</p>
    <p>indexOf(name, 'dbms'): ${fn:indexOf(name,'dbms')}</p>
    <p>contains(name, 'Oracle'): ${fn:contains(name, 'Oracle')}</p>
    <p>containsIgnoreCase(name, 'opracle'): ${fn:containsIgnoreCase(name, 'oracle')}</p>
    <p>startsWith(name, 'Oracle'): ${fn:startsWith(name, 'Oracle')}</p>
    <p>startsWith(name, 'dbms'): ${fn:startsWith(name, 'dbms')}</p>
    <p>endsWith(name, '오라클클럽'): ${fn:endsWith(name, '오라클클럽')}</p>
    <c:remove var="name"/>
    
    <c:set var="dbname" value="ORACLE, DB2, MSSQL, MYSQL, SYSBASE"/>
    <c:set var="db_arr" value="${fn:split(dbname,',')}"/>
    <c:forEach var="db" items="${db_arr}">
        ${db}<br/>
    </c:forEach>
    <p>join : ${fn:join(db_arr, ',')}</p>

 

 

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