> For the complete documentation index, see [llms.txt](https://team-everywhere.gitbook.io/backend/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://team-everywhere.gitbook.io/backend/spring/servlet/07-jstl-jsp.md).
# 07 JSTL(JSP 스탠다드 태그 라이브러리)
p160 - build.gradle
```gradle
plugins {
id 'java'
id 'war'
id 'org.springframework.boot' version '3.2.8'
id 'io.spring.dependency-management' version '1.1.6'
}
group = 'education'
version = '0.0.1-SNAPSHOT'
java {
toolchain {
languageVersion = JavaLanguageVersion.of(17)
}
}
repositories {
mavenCentral()
}
dependencies {
implementation 'org.springframework.boot:spring-boot-starter-web'
implementation 'org.apache.tomcat.embed:tomcat-embed-jasper'
implementation 'jakarta.servlet.jsp.jstl:jakarta.servlet.jsp.jstl-api'
implementation 'org.glassfish.web:jakarta.servlet.jsp.jstl'
providedRuntime 'org.springframework.boot:spring-boot-starter-tomcat'
implementation 'jakarta.servlet:jakarta.servlet-api'
testImplementation 'org.springframework.boot:spring-boot-starter-test'
testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
implementation 'org.projectlombok:lombok'
annotationProcessor 'org.projectlombok:lombok'
}
tasks.named('test') {
useJUnitPlatform()
}
```
p161 - src/main/webapp/jsp/jstl/core-out.jsp
```html
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%
String userName = "LEE";
request.setAttribute("userName", userName);
%>
Title
Welcome,
```
p162 - src/main/webapp/jsp/jstl/core-set.jsp
```markup
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%
String userName = "LEE";
request.setAttribute("userName", userName);
%>
Title
<%-- request 스코프에서 greeting 변수를 설정 --%>
<%-- session 스코프에서 greeting 변수를 설정 --%>
Message:
<%-- application 스코프에서 greeting 변수를 설정 --%>
```
p164 - src/main/webapp/jsp/jstl/core-remove.jsp
```markup
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%
String userName = "LEE";
request.setAttribute("userName", userName);
%>
Title
Message:
```
p165 - src/main/webapp/jsp/jstl/core-if.jsp
```markup
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
User Age Check
<%-- 나이 변수를 설정 --%>
<%-- 조건에 따라 성인 여부를 출력 --%>
You are an adult.
You are not an adult.
```
p166 - src/main/webapp/jsp/jstl/core-choose.jsp
```markup
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
User Age Check
<%-- 나이 변수를 설정 --%>
Welcome, Admin!
Welcome, User!
Welcome, Guest!
```
p168 - src/main/webapp/jsp/jstl/core-foreach.jsp
```html
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
User Roles Check
<%-- 역할 리스트 설정 --%>
<%-- 각 역할에 따른 메시지 출력 --%>
Welcome, Admin!
Welcome, User!
Welcome, Guest!
```
p169 - src/main/webapp/jsp/jstl/core-fortokens.jsp
```markup
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
User Age Check
${language}
```
p170 - src/main/webapp/jsp/jstl/core-import.jsp
```markup
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
This is the main content of the page.
```
p171 - src/main/webapp/jsp/jstl/core-url.jsp
```markup
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
User Age Check
<%-- 나이 변수를 설정 --%>
View Profile
```
p173 - src/main/webapp/jsp/jstl/fmt.jsp
```markup
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<%
java.util.Date now = new java.util.Date();
request.setAttribute("now", now);
%>
<%
double amount = 1234567.89;
request.setAttribute("amount", amount);
%>
Current Date and Time:
Original Number: ${amount}
Formatted Number:
Formatted Currency:
Formatted Percentage:
Custom Pattern:
Current Locale is set to US
Current Locale is set to Korea
```
p174, 176 - src/main/webapp/jsp/jstl/fmt-messages.jsp
```html
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<%----%>
<%----%>
<%----%>
Browser Accept-Language: ${header['Accept-Language']}
```
p178 - src/main/webapp/jsp/jstl/fn.jsp
```html
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
Length of 'Hello World': ${fn:length('Hello World')}
'World' is found in 'Hello World'.
<%
String[] words = {"Hello", "World", "JSTL"};
request.setAttribute("words", words);
%>
Joined String: ${fn:join(words, ', ')}
Substring of 'Hello World': ${fn:substring('Hello World', 0, 5)}
```
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