티스토리 뷰

FRONT-END/JSP

[JSP] JSTL <c:forEach>로 변경

진심스테이크 2018. 5. 6. 15:44

예제 1

 

ElTest.java

package el.test;

public class ElTest {
    private String[] productList = { "test1", "test2", "test3", "test4", "test5" };
    private int num1 = 30;
    private int num2 = 50;

    public String[] getProductList() {
        return productList;
    }

    public void setProductList(String[] productList) {
        this.productList = productList;
    }

    public int getNum1() {
        return num1;
    }

    public void setNum1(int num1) {
        this.num1 = num1;
    }

    public int getNum2() {
        return num2;
    }

    public void setNum2(int num2) {
        this.num2 = num2;
    }
}

 

 

Eltest.jsp

<%@ page language="java" contentType="text/html; charset=EUC-KR"
    pageEncoding="EUC-KR"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=EUC-KR">
<title>Insert title here</title>
</head>
<body>
    <form name=from1 method="post" action="sel.jsp">
        <jsp:useBean id="eltest" class="el.test.ElTest" scope="session"></jsp:useBean>

        <select name="sel">
            <%
                for (String item : eltest.getProductList()) {
                    out.println("<option>" + item + "</option>");
                }
            %>
        </select> <br> <input type="submit" value="선택" />
    </form>
</body>
</html>

 

 

sel.jsp

<%@ page language="java" contentType="text/html; charset=EUC-KR"
    pageEncoding="EUC-KR"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=EUC-KR">
<title>Insert title here</title>
</head>
<body>
    선택한 상품 : ${ param.sel}
    <br> num1 값 : ${eltest.num1 }
    <br> num2 값 : ${eltest.num2 }
    <br> num1 + num2 = ${eltest.num1 + eltest.num2 }
</body>
</html>

 

 

 

 

forEach로 변경

 

 

ElTest_forEach.jsp

<%@ 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>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=EUC-KR">
<title>Insert title here</title>
</head>
<body>
    <form name=from1 method="post" action="sel_forEach.jsp">
        <jsp:useBean id="eltest_forEach" class="el.test.ElTest"
            scope="session"></jsp:useBean>

        <select name="sel">
            <c:forEach var="item" items="${eltest_forEach.getProductList()}">
                <option>${item }</option>
            </c:forEach>
        </select> <br> <input type="submit" value="선택" />
    </form>
</body>
</html>

 

 

sel_forEach.jsp

<%@ page language="java" contentType="text/html; charset=EUC-KR"
    pageEncoding="EUC-KR"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=EUC-KR">
<title>Insert title here</title>
</head>
<body>
    선택한 상품 : ${ param.sel}
    <br> num1 값 : ${eltest_forEach.num1 }
    <br> num2 값 : ${eltest_forEach.num2 }
    <br> num1 + num2 = ${eltest_forEach.num1 + eltest_forEach.num2 }
</body>
</html>

 

 

 

 

 

 

예제 2

 

<c:forTokens>를 <c:forEach>로 변경

 

 

forTokens

<%@ 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>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=EUC-KR">
<title>Insert title here</title>
</head>
<body>
    <h3>&lt;c:forTokens&gt;</h3>
    <c:forTokens items="123-456-789" delims="-" var="sel">
${sel }<br>
    </c:forTokens>
</body>
</html>

 

 

forEach

<%@ page language="java" contentType="text/html; charset=EUC-KR"
    pageEncoding="EUC-KR"%>

<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%>
<%@ 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>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=EUC-KR">
<title>Insert title here</title>
</head>
<body>
    <h3>&lt;c:forEach&gt;</h3>
    <c:set var="tel" value="123-456-789" />
    <c:set var="result" value="${fn:split(tel,'-')}" />
    <c:forEach var="telNum" items="${result}">
        ${telNum } <br>
    </c:forEach>
</body>
</html>
저작자표시 비영리 변경금지

'FRONT-END > JSP' 카테고리의 다른 글

[JSP] JSTL  (0) 2018.05.04
[JSP] MVC PATTERN  (0) 2018.05.02
[JSP] JAVABEAN  (0) 2018.04.16
[JSP] ACTION TAG - 액션 태그  (0) 2018.04.16
[JSP] 간단한 장바구니  (0) 2018.04.13
댓글