EL과 JSTL

2009. 6. 1. 18:24

<%@ page~ %>

<%@ include file %>
<jsp:include page= />

<%@ taglib %>

JSTL 소개

<%@ taglib prefix = "c" uri = "http://java.sun.com/jsp/jstl/cone" %>
<%@ taglib prefix = "fmt" uri = "http://java.sun.com/jsp/jstl/fmt" %>
<%@ taglib prefix = "sql" uri = "http://java.sun.com/jsp/jstl/sql" %>
<%@ taglib prefix = "x" uri = "http://java.sun.com/jsp/jstl/xml" %>

코어 라이브러리

<c:out> 태그

<%@ page contentType = "text/html; charset=euckr" %>
<%@ taglib prefix = "c" uri = "http://java.sun.com/jsp/jstl/core" %>
<html>
<body>
<c:set var = "pass" value="${param.pass}" /> 
<c:out value="${pass}" />
</body>
</html>

<c:if > 태그

<%@ page contentType = "text/html; charset=euckr" %>
<%@ taglib prefix = "c" uri = "http://java.sun.com/jsp/jstl/core" %>
<html>
<body>
    <c:set var = "pass" value="${param.pass}" />
    <c:if test="${!empty pass}">
        Pass value : ${pass}
    </c:if>
    <c:if test="${empty pass}">Please input param...
    </c:if>
    <%-- <c:out value="${pass}" /> --%>
</body>
</html>

<%@ page contentType = "text/html; charset=euckr" %>
<%@ taglib prefix = "c" uri = "http://java.sun.com/jsp/jstl/core" %>
<html>
<body>
    <c:set var = "pass" value="${param.pass}" />
    <c:if test="${!empty pass}">
        Pass value : ${pass}
    </c:if>

    <c:if test="${pass eq 'hello'}">, welcome
    </c:if>

    <c:if test="${pass ne 'hello'}">Again!!
    </c:if>

    <c:if test="${empty pass}">Please input param...
    

    </c:if>
</body>
</html>

<c:if> 태그 이용하여 파라메터에 따라 다른 값 출력하기

<%@ page contentType = "text/html; charset=euckr" %>
<%@ taglib prefix = "c" uri = "http://java.sun.com/jsp/jstl/core" %>
<html>
<body>
    <c:set var="score" value="${param.score}" />
        score : ${score}
        <br>
    <c:choose>
        <c:when test="${(100 >= score) && (score >= 90)}">
            <c:out value="'수'를 받으실 수 있겠네요!!" />
        </c:when>
        <c:when test="${(90>score) && (score >=80)}">
            <c:out value="'우'는 받으실 수 있겠네요." />
        </c:when>
        <c:when test="${ (80>score) && (score >= 70) }">
            <c:out value="'미'는 받으실 수 있겠어요. ㅡㅅ-);" />
        </c:when>
        <c:when test="${ (70>score) && (score >= 60) }">
            <c:out value="'양'는 받으실 수 있겠어요. ㅡㅅ-);" />
        </c:when>
        <c:when test="${ (60>score) && (score >= 50) }">
            <c:out value="'가'는 받으실 수 있겠어요. ㅡㅅ-);" />
        </c:when>
        <c:otherwise>
            <c:out value="모르겠네요. ㅡㅅ-); 뭘 입력한거에요? 공부좀 하세요." />
        </c:otherwise>
    </c:choose>
</body>
</html>

<c:forEach> 태그 이용하여 구구단 표현하기

<%@ page contentType = "text/html; charset=euckr" %>
<%@ taglib prefix = "c" uri = "http://java.sun.com/jsp/jstl/core" %>
<html>
<body>
    <table border="1">
    <c:forEach var="x" begin="1" end="9" step="1">
        <tr>
        <c:forEach var="y" begin="1" end="9" step="1">
        <td><c:out value="${y}" /> X <c:out value="${x}" /> = <c:out value="${x*y}"/></td>
        </c:forEach>
        </tr>
    </c:forEach>
    </table>
</body>
</html>

<c:import> 태그 사용

<%@ page language="java" contentType="text/html; charset=EUC-KR" pageEncoding="EUC-KR"%>
<%@ taglib prefix = "c" uri = "http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<body>
    <h1>이것은 구구단이다.</h1>
    <hr>
    <c:import url="test.jsp" />
    <hr>
</body>
</html>

<c:redirect> 태그 사용

<%@ page contentType = "text/html; charset=euckr" %>
<%@ taglib prefix = "c" uri = "http://java.sun.com/jsp/jstl/core" %>
<html>
<body>
    <c:set var = "pass" value="${param.pass}" />
    <c:if test="${!empty pass}">
        Pass value : ${pass}
    </c:if>

    <c:if test="${pass eq 'hello'}">, welcome
    </c:if>

    <c:if test="${pass ne 'hello'}">
        <c:redirect url="test.jsp" />
    </c:if>

    <c:if test="${empty pass}">Please input param...
    

    </c:if>
</body>
</html>

SQL 라이브러리

<%@ page contentType = "text/html; charset=euckr" %>
<%@ taglib prefix = "c" uri = "http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix = "sql" uri = "http://java.sun.com/jsp/jstl/sql" %>

<sql:setDataSource
    var="ds"
    driver = "oracle.jdbc.driver.OracleDriver"
    url = "jdbc:oracle:thin:@127.0.0.1:1521:cjedu"
    user = "scott"
    password = "tiger"
/>

<sql:query dataSource="${ds}" var="rs">
    SELECT * FROM customer
</sql:query>

<html>
    <table border = "1" >
        <c:forEach var="row" items="${rs.rows}"> 
            <tr>
                <td>${row.num}</td>
                <td>${row.name}</td>
                <td>${row.address}</td>
            </tr>
        </c:forEach>
    </table>
</html>

<c:include> 태그를 이용해서 처리하는 방법: DataSource 풀 사용

<%@ page contentType = "text/html; charset=euckr" %>
<%@ taglib prefix = "c" uri = "http://java.sun.com/jsp/jstl/core" %>

<%@ include file="OracleInfo.jsp" %>
<sql:query dataSource="jdbc/oracle" var="rs">
    SELECT * FROM store
</sql:query>

<html>
    <table border = "1" >
        <c:forEach var="row" items="${rs.rows}">
            <tr>
                <td>${row.pid}</td>
                <td>${row.pname}</td>
                </tr>
        </c:forEach>
    </table>
</html>

<sql:update> 태그 사용

<%@ page contentType = "text/html; charset=euckr" %>
<%@ taglib prefix = "c" uri = "http://java.sun.com/jsp/jstl/core" %>

<%@ include file="OracleInfo.jsp" %>
<%-- <sql:update dataSource="jdbc/oracle" var="rs">
    INSERT INTO customer VALUES('729','honeymon', 'earth')
</sql:update> --%>

<html>
    처리가 완료되었습니다.
    <hr>
<%@ include file="OracleInfo.jsp" %>
<sql:query dataSource="${ds}" var="rs">
    SELECT * FROM customer
</sql:query>

<html>
    <table border = "1" >
        <c:forEach var="row" items="${rs.rows}">
            <tr>
                <td>${row.num}</td>
                <td>${row.name}</td>
                <td>${row.address}</td>
            </tr>
        </c:forEach>
    </table>
</html>
</html>

<sql:transaction> 처리 한 경우

<%@ page contentType = "text/html; charset=euckr" %>
<%@ taglib prefix = "c" uri = "http://java.sun.com/jsp/jstl/core" %>

<%@ include file="OracleInfo.jsp" %>
<sql:transaction dataSource="${ds}">
<sql:update var="rs">
    INSERT INTO customer VALUES('730','honeymon', 'earth')
</sql:update>
in: %{rs}
<html>
    처리가 완료되었습니다.
    <hr>
<sql:query var="rs">
    SELECT * FROM customer
</sql:query>
</sql:transaction>

    <table border = "1" >
        <c:forEach var="row" items="${rs.rows}">
            <tr>
                <td>${row.num}</td>
                <td>${row.name}</td>
                <td>${row.address}</td>
            </tr>
        </c:forEach>
    </table>
</html>

이 글은 스프링노트에서 작성되었습니다.

'Java > Language' 카테고리의 다른 글

자바(JSP)를 이용한 암호화 기능 만들기 (2)	2009.06.06
Javaone : Change (Y)our World : 우리의 세상을 바꿀 수 있을까? (0)	2009.06.03
JSP - Bean을 이용하여 스크립트렛 줄이기 (0)	2009.05.27
09/05/22 쿠키 (0)	2009.05.25
허니몬, JavaFX 예제 만들기 (0)	2009.05.24

허니몬(Honeymon)의 자바guru