인프런 커뮤니티 질문&답변

빈 등록이 제대로 안되서 생긴 오류 같은데 원인을 모르겠습니다

package hello.servlet;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;

@ServletComponentScan
@SpringBootApplication
public class ServletApplication {

	public static void main(String[] args) {
		SpringApplication.run(ServletApplication.class, args);
	}

}

package hello.servlet.basic.request;

import jakarta.servlet.ServletException;
import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

import java.io.IOException;

@WebServlet(name = "requestHeaderServlet", urlPatterns = "/request-header")
public class RequestHeaderServlet extends HttpServlet {

    @Override
    protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        printStartLine(request);
    }

    private static void printStartLine(HttpServletRequest request) {
        System.out.println("--- REQUEST-LINE - start ---");
        System.out.println("request.getMethod() = " + request.getMethod()); // GET
        System.out.println("request.getProtocol() = " + request.getProtocol()); // HTTP/1.1
        System.out.println("request.getScheme() = " + request.getScheme()); // http
        // http://localhost:8080/request-header
        System.out.println("request.getRequestURL() = " + request.getRequestURL());
        // /request-header
        System.out.println("request.getRequestURI() = " + request.getRequestURI());
        // username=hi
        System.out.println("request.getQueryString() = " + request.getQueryString());
        System.out.println("request.isSecure() = " + request.isSecure()); // https 사용유무
        System.out.println("--- REQUEST-LINE - end ---");
        System.out.println();
    }
}

2024-05-28T16:16:58.435+09:00 WARN 10588 --- [ main] s.c.a.AnnotationConfigApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'servletComponentRegisteringPostProcessor': Instantiation of supplied bean failed

2024-05-28T16:16:58.452+09:00 INFO 10588 --- [ main] .s.b.a.l.ConditionEvaluationReportLogger :

Error starting ApplicationContext. To display the condition evaluation report re-run your application with 'debug' enabled.

2024-05-28T16:16:58.498+09:00 ERROR 10588 --- [ main] o.s.boot.SpringApplication : Application run failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'servletComponentRegisteringPostProcessor': Instantiation of supplied bean failed

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.obtainFromSupplier(AbstractAutowireCapableBeanFactory.java:1223) ~[spring-beans-6.1.6.jar:6.1.6]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1161) ~[spring-beans-6.1.6.jar:6.1.6]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:562) ~[spring-beans-6.1.6.jar:6.1.6]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:522) ~[spring-beans-6.1.6.jar:6.1.6]

at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:326) ~[spring-beans-6.1.6.jar:6.1.6]

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-6.1.6.jar:6.1.6]

at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:324) ~[spring-beans-6.1.6.jar:6.1.6]

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:205) ~[spring-beans-6.1.6.jar:6.1.6]

at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:202) ~[spring-context-6.1.6.jar:6.1.6]

at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:788) ~[spring-context-6.1.6.jar:6.1.6]

at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:606) ~[spring-context-6.1.6.jar:6.1.6]

at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754) ~[spring-boot-3.2.5.jar:3.2.5]

at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:456) ~[spring-boot-3.2.5.jar:3.2.5]

at org.springframework.boot.SpringApplication.run(SpringApplication.java:334) ~[spring-boot-3.2.5.jar:3.2.5]

at org.springframework.boot.SpringApplication.run(SpringApplication.java:1354) ~[spring-boot-3.2.5.jar:3.2.5]

at org.springframework.boot.SpringApplication.run(SpringApplication.java:1343) ~[spring-boot-3.2.5.jar:3.2.5]

at hello.servlet.ServletApplication.main(ServletApplication.java:12) ~[main/:na]

Caused by: java.lang.NoClassDefFoundError: jakarta/servlet/annotation/WebServlet

at org.springframework.boot.web.servlet.WebServletHandler.<init>(WebServletHandler.java:39) ~[spring-boot-3.2.5.jar:3.2.5]

at org.springframework.boot.web.servlet.ServletComponentRegisteringPostProcessor.<clinit>(ServletComponentRegisteringPostProcessor.java:62) ~[spring-boot-3.2.5.jar:3.2.5]

at org.springframework.boot.web.servlet.ServletComponentScanRegistrar$ServletComponentRegisteringPostProcessorBeanDefinition.lambda$getInstanceSupplier$0(ServletComponentScanRegistrar.java:94) ~[spring-boot-3.2.5.jar:3.2.5]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.obtainInstanceFromSupplier(AbstractAutowireCapableBeanFactory.java:1257) ~[spring-beans-6.1.6.jar:6.1.6]

at org.springframework.beans.factory.support.DefaultListableBeanFactory.obtainInstanceFromSupplier(DefaultListableBeanFactory.java:951) ~[spring-beans-6.1.6.jar:6.1.6]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.obtainFromSupplier(AbstractAutowireCapableBeanFactory.java:1217) ~[spring-beans-6.1.6.jar:6.1.6]

... 16 common frames omitted

Caused by: java.lang.ClassNotFoundException: jakarta.servlet.annotation.WebServlet

at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641) ~[na:na]

at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188) ~[na:na]

at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526) ~[na:na]

... 22 common frames omitted