Spring 500 내부 서버 오류가 발생하는데 원인을 못찾겠습니다.

Question

안녕하세요!JAVA Spring Framework login intercepter 구현 중에 웹 서버 실행 후 HTTP 상태 500 - 내부서버 오류 서블릿 [appServlet]을(를) 위한 Servlet.init() 호출이 예외를 발생시켰습니다. 에러가 발생합니다. (서버가, 해당 요청을 충족시키지 못하게 하는 예기치 않은 조건을 맞닥뜨렸습니다.) 예외javax.servlet.ServletException: 서블릿 [appServlet]을(를) 위한 Servlet.init() 호출이 예외를 발생시켰습니다. org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:690) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374) org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:880) org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1601) org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) java.base/java.lang.Thread.run(Thread.java:834)원인 org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userController': Unsatisfied dependency expressed through field 'service'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean found for dependency [org.zerock.service.UserService]: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@javax.inject.Inject()} org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:569) org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:349) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1219) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:751) org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:861) org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541) org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:668) org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:634) org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:682) org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:553) org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:494) org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136) javax.servlet.GenericServlet.init(GenericServlet.java:158) org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:690) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374) org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:880) org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1601) org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) java.base/java.lang.Thread.run(Thread.java:834)원인2 org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean found for dependency [org.zerock.service.UserService]: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@javax.inject.Inject()} org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1463) org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1094) org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1056) org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:566) org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:349) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1219) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:751) org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:861) org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541) org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:668) org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:634) org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:682) org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:553) org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:494) org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136) javax.servlet.GenericServlet.init(GenericServlet.java:158) org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:690) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374) org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:880) org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1601) org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) java.base/java.lang.Thread.run(Thread.java:834) usercontrollerpackage org.zerock.controller; import javax.inject.Inject; import javax.servlet.http.HttpSession; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.ModelAttribute; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.zerock.domain.UserVO; import org.zerock.dto.LoginDTO; import org.zerock.service.UserService; @Controller @RequestMapping("/user") public class UserController { @Inject private UserService service; @RequestMapping(value = "/login", method = RequestMethod.GET) public void loginGET(@ModelAttribute("dto") LoginDTO dto) { } @RequestMapping(value = "/loginPost", method = RequestMethod.POST) public void loginPOST(LoginDTO dto, HttpSession session, Model model) throws Exception { UserVO vo = service.login(dto); if (vo == null) { return; } model.addAttribute("userVO", vo); } } DAOpackage org.zerock.persistence; import org.zerock.domain.UserVO; import org.zerock.dto.LoginDTO; public interface UserDAO { public UserVO login(LoginDTO dto)throws Exception; } DAOIMPpackage org.zerock.persistence; import javax.inject.Inject; import org.apache.ibatis.session.SqlSession; import org.springframework.stereotype.Repository; import org.zerock.domain.UserVO; import org.zerock.dto.LoginDTO; @Repository public class UserDAOImpl implements UserDAO { @Inject private SqlSession session; private static String namespace = "org.zerock.mapper.UserMapper"; @Override public UserVO login(LoginDTO dto) throws Exception { return session.selectOne(namespace + ".login", dto); } } Servicepackage org.zerock.service; import javax.inject.Inject; // import javax.inject.Inject; // import org.apache.ibatis.session.SqlSession; import org.springframework.stereotype.Service; import org.zerock.domain.UserVO; import org.zerock.dto.LoginDTO; @Service public interface UserService { @Inject public UserVO login(LoginDTO dto) throws Exception; } Serviceimplpackage org.zerock.service; import javax.inject.Inject; import org.springframework.stereotype.Repository; import org.springframework.stereotype.Service; import org.zerock.domain.UserVO; import org.zerock.dto.LoginDTO; import org.zerock.persistence.UserDAO; @Repository @Service public class UserServiceImpl implements UserService { @Inject private UserDAO dao; @Override public UserVO login(LoginDTO dto) throws Exception { return dao.login(dto); } } web.xml

contextConfigLocation

/WEB-INF/spring/root-context.xml

org.springframework.web.context.ContextLoaderListener

appServlet

org.springframework.web.servlet.DispatcherServlet

contextConfigLocation

/WEB-INF/spring/appServlet/servlet-context.xml

1

appServlet

/

servlet-context.xml

Usermapper.xml 갓 입문한 웹 개발 신입입니다. 로그인 인터셉트 구현과정에서 다음과 같이 에러가 발생하는데 어디서부터 손을 봐야할지 모르겠습니다.의심가는 포인트가 몇 없어서 경로지정이 잘못됐는지 잘 모르겠습니다.도움이 절실하게 필요합니다. 조언 부탁드립니다!

공부는 습관 · Answer

&#64;Service public interface UserService { &#64;Inject public UserVO login(LoginDTO dto) throws Exception; }여기서 &#64;Inject는 왜 써주신거에요?

HJ K · Answer

HTTP 상태 500 - 내부 서버 오류 내용 중에서 원인 중에 'org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userController': Unsatisfied dependency expressed through field 'service'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean found for dependency [org.zerock.service.UserService]: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {&#64;javax.inject.Inject()}' 이런 내용이 있길래 해석할 줄 몰라서 맨 마지막 줄에 [org.zerock.service.Userservice] 부분과 '&#64;javax.inject.Inject()' 내용이 있길래 Userservice 인터페이스 페이지에 Inject 어노테이션을 붙여야 하는 줄로 이해하고 붙였어요.

공부는 습관 · Answer

servlet-context.xml 에서 <context:component-scan base-package&#61;&#34;org.zerock.controller&#34; /> 이부분을 service도 스캔 가능하도록 org.zerock로 변경해주셔야겠네요.

HJ K · Answer

말씀하신대로 servlet-context.xml 에서 를servlet-context.xml 에서 로 변경했습니다. 아직 해결이 안되었고 증상은 다음과 같이 나왔습니다.org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userController': Unsatisfied dependency expressed through field 'service'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userServiceImpl': Unsatisfied dependency expressed through field 'dao'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userDAOImpl': Unsatisfied dependency expressed through field 'session'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean found for dependency [org.apache.ibatis.session.SqlSession]: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@javax.inject.Inject()} 이런 상황에서 어떤 조치가 좋을까요?

공부는 습관 · Answer

오류 내용을 보면 SqlSession이라는 빈을 DAO가 주입 받지 못하기 때문에 발생하는 것으로 보이는데요, 제가 그냥 정답을 알려드릴 수도 있겠지만 이 오류를 해결하려면 어떻게 해야 할지 고민해보시면 좋을 것 같아요. 앞으로 개발을 하시다 보면 이런 오류들을 수없이 만나게 되는데, 왜 스프링이 userDAOImpl이라는 빈을 생성하는 과정에서 SqlSession이라는 빈을 주입받지 못하는지, 주입받으려면 어떻게 해야하는지 원리를 고민해보시고 그에 맞게 검색을 해보시면 충분히 답을 얻으실 수 있을거에요.

HJ K · Answer

감사합니다! 말씀하신 부분 테스트 계속 해 보고 개념과 원리에 대해 고민해 보겠습니다. 계속해서 시도하고 해결이 안 되거나, 궁금한 질문이 생기면 또 질문드리겠습니다!

Spring 500 내부 서버 오류가 발생하는데 원인을 못찾겠습니다.

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