I am trying to make the SpringBoot tutorial from Youtube. But in IntelliJ + Maven, not Eclipse. At the 1 hour mark, they add the jasper dependency and then run the program and it works nicely.
Before I add the jasper dependency, I have no errors. After I add it, I get this error:
Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is java.lang.NoClassDefFoundError: jakarta/servlet/jsp/JspFactory. This is my main App File:
import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.web.servlet.support.SpringBootServletInitializer; @SpringBootApplication public class CoursesWebApp { public static void main(String[] args) { SpringApplication.run(CoursesWebApp.class, args); } } and the controller file
package com.example.springboot; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; @Controller public class CoursesController { @RequestMapping("/courses") public void coursesDisplay() { System.out.println("Welcome to courses!"); //return "course.jsp"; } } This is my pom.xml file:
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.5.2</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.example</groupId> <artifactId>spring-boot</artifactId> <version>0.0.1-SNAPSHOT</version> <name>spring-boot</name> <description>Project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jersey</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web-services</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.apache.tomcat</groupId> <artifactId>tomcat-jasper</artifactId> <version>10.0.8</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project> I have installed Tomcat version 10.0.8 and matched the Jasper with the same version.
I tried to make public class CoursesWebApp extends SpringBootServletInitializer, didn't work.
There is the annotation for @SpringBootApplication.
I tried to add
<dependency> <groupId>org.apache.tomcat.embed</groupId> <artifactId>tomcat-embed-jasper</artifactId> <scope>provided</scope> </dependency> With scope changed to default or compile, didn't work.
I am utterly new at this and I have no idea how to fix it. It feels like it's something small, but I can't see it.
Thanks in advance for your help!
