[Spring Boot] JSP with JSTL

Spring Boot 3.0이상에서 JSP와 JSTL을 사용하려고 maven 등록을 할 때 아래와 같은 코드에서는 에러가 발생한다.

	<!-- tomcat-embed-jasper -->
	<dependency>
		<groupId>org.apache.tomcat.embed</groupId>
		<artifactId>tomcat-embed-jasper</artifactId>
	</dependency>
	<!-- jstl -->
	<dependency>
		<groupId>javax.servlet</groupId>
		<artifactId>jstl</artifactId>
	</dependency>

javax.servlet:jstl:jar:unknown was not found in https://repo.maven.apache.org/maven2 during a previous attempt. This failure was cached in the local repository and resolution is not reattempted until the update interval of central has elapsed or updates are forced

알아보니까 Spring Boot 3.0이상에서는 Servlet의 패키지가 변경되었고 이에 따라 JSTL를 변경이 일어났나보다.

패키지 변경 : javax.servlet    ->    jakarta.servlet

JSP를 View로 리턴해줄 수 있도록 tomcat과 JSTL를 사용하기 위해 아래와 같이 주입해야 한다.

<!-- tomcat-embed-jasper -->
<dependency>
	<groupId>org.apache.tomcat.embed</groupId>
	<artifactId>tomcat-embed-jasper</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/jakarta.servlet/jakarta.servlet-api -->
<dependency>
	<groupId>jakarta.servlet</groupId>
	<artifactId>jakarta.servlet-api</artifactId>
	<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/jakarta.servlet.jsp.jstl/jakarta.servlet.jsp.jstl-api -->
<dependency>
	<groupId>jakarta.servlet.jsp.jstl</groupId>
	<artifactId>jakarta.servlet.jsp.jstl-api</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.glassfish.web/jakarta.servlet.jsp.jstl -->
<dependency>
	<groupId>org.glassfish.web</groupId>
	<artifactId>jakarta.servlet.jsp.jstl</artifactId>
</dependency>