안녕하세요 강사님! 컬럼에 특수기호 중 + (플러스) 문자가 포함된 값을 찾으려고하는데요 정규식에 해당 기호를 쓰면 오류가 발생하는데 어떻게 해당 문자만 골라 뽑을 수 있을지 질문드립니다 .

else {일치하는 회원이 없습니다.}이 부분에서 리스트에서 클릭해서 들어오니까일치하는 회원이 없을 수가 없는 거 같은데 맞나요?!

[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed: java.lang.IllegalArgumentException: Name for argument of type [java.lang.String] not specified, and parameter name information not available via reflection. Ensure that the compiler uses the '-parameters' flag.] with root cause계속 위와 같은 에러가 떠서gpt랑 구글링을 하니까 생성자 클래스에 @ConstructorProperties({"number1", "number2"}) 어노테이션을 추가하라고 해서 추가했더니 값이 출력되는데 이 어노테이션을 작성하는게 맞나요?또 다른 글에는 java compiler를 수정하라고 하는데 맞는지 궁금합니다 !저는 sts4로 진행중입니다 !

안녕하세요.다름이 아니라 제가 혼자 연습하다가 헷갈리는 점이 있어서 질문드립니다!! 일단 JSON형식의 응답을 만들기 위해서 DTO에 멤버변수에 대한 getter메서드가 있어야 한다는 것은 알고 있습니다!! 그래서 아래 코드와 같이 응답 DTO를 만들었습니다.@Getter @Setter public class WeatherInfoResponse { private String baseDate; private String baseTime; private String category; private String fcstDate; private String fcstTime; private List<WeatherAndTemp> weatherAndTempList; public WeatherInfoResponse(List<WeatherAndTemp> weatherAndTempList) { this.weatherAndTempList = weatherAndTempList; } }그런데 문제가 저 WeatherAndTemp 객체를 담는 리스트 부분입니다.아래가 WeatherAndTemp 클래스입니다.@Getter public class WeatherAndTemp { private String weather; private String temp; public WeatherAndTemp(String weather, String temp) { this.weather = weather; this.temp = temp; } }제가 헷갈리는 점이 처음에 WeatherAndTemp 클래스를 getter 메서드를 생성하지 않고 만들었다가 오류가 났었습니다. 그런데 getter 메서드를 생성하니 잘됩니다. 저는 원래 응답 DTO만 Getter가 필요하다고 알고 있었는데 저런 경우는 어떤 경우인가요? 응답 DTO의 멤버변수에 사용되는 클래스도 Getter 메서드를 만들어야 하나요?

spring: datasource: url: "jdbc:mysql://localhost/library" username: "root" password: "비밀번호" driver-class-name: com.mysql.cj.jdbc.Driver위와 같이 application.yml 파일을 작성했는데, 사용자 등록을 하면 서버 내부 오류라고 뜨면서 아무것도 안되더라구요.개발자 도구로도 봤는데 뭐가 문제인지 잘 모르겠어서 구글을 찾아보다가 jpa: database: mysql hibernate.ddl-auto: update show-sql: trueapplication.yml 파일에 추가로 이걸 입력하니까 정상적으로 작동하네요.. 혹시 이렇게 두고 실행해도 괜찮은건지 여쭤보고싶었습니다!   

최근 전자정부프레임워크 버전이 4.2인데 4.2로 학습해도 문제가 없나요??

다수의 강의들이 화면이 아래 그림과 같이 나오지 않습니다. 일부 강의는 잘 나오고 일부 강의는 음성만 나오네요.

다음과 같은 현상이 일어나며, 정상적으로 설치는 완료하였습니다. 다만 연결하는 디렉토리를 /db/~~ 로 시작하는 것을 제 개인 폴더 /mnt/db/~~ 로 설정해주었는데 이러한 이유가 무엇떄문에 일어날까요?

이렇게 db001제외하곤 안만들어지는데 어떻게할까요? 

dto에서 request를 구성할 때에 Create와 Update에 대한 request를 두 개로 나누어 구성하시는 것을 봤습니다.제가 생각하기에 user 테이블에 접근하여, userService에 사용되기 위한 것이니 UserRequest라는 클래스를 만들어 하나로 통합하여 사용하면 보기 편하고 사용하기 쉬울 것 같습니다.성능에서 차이가 있다던지 request를 따로 구별해서 사용하신 이유가 있는지 궁금합니다.

 다음과 같이 제 공인 IP로 요청할때 testdb까지는 만들어졌는데 insert_test 가 없다고 뜨는데 어떻게 해야할까요? insert_test만 만들면 될까요?

26강 듣는중간에 실행 시켰는데 오류가 나오네요섹션3까지는 문제없이 잘 됐습니다.Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.2024-05-26 21:37:17.517 ERROR 12508 --- [ main] o.s.boot.SpringApplication : Application run failedorg.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'dataSourceScriptDatabaseInitializer' defined in class path resource [org/springframework/boot/autoconfigure/sql/init/DataSourceInitializationConfiguration.class]: Unsatisfied dependency expressed through method 'dataSourceScriptDatabaseInitializer' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Hikari.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.zaxxer.hikari.HikariDataSource]: Factory method 'dataSource' threw exception; nested exception is java.lang.IllegalStateException: Cannot load driver class: com.mysql.cj.jdbc.Driver at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:541) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1352) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1195) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1154) ~[spring-context-5.3.24.jar:5.3.24] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:908) ~[spring-context-5.3.24.jar:5.3.24] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.24.jar:5.3.24] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:147) ~[spring-boot-2.7.6.jar:2.7.6] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:731) ~[spring-boot-2.7.6.jar:2.7.6] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408) ~[spring-boot-2.7.6.jar:2.7.6] at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) ~[spring-boot-2.7.6.jar:2.7.6] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1303) ~[spring-boot-2.7.6.jar:2.7.6] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1292) ~[spring-boot-2.7.6.jar:2.7.6] at com.group.libraryapp.LibraryAppApplication.main(LibraryAppApplication.java:10) ~[main/:na]Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Hikari.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.zaxxer.hikari.HikariDataSource]: Factory method 'dataSource' threw exception; nested exception is java.lang.IllegalStateException: Cannot load driver class: com.mysql.cj.jdbc.Driver at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:658) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:638) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1352) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1195) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1391) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1311) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:887) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791) ~[spring-beans-5.3.24.jar:5.3.24] ... 21 common frames omittedCaused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.zaxxer.hikari.HikariDataSource]: Factory method 'dataSource' threw exception; nested exception is java.lang.IllegalStateException: Cannot load driver class: com.mysql.cj.jdbc.Driver at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:653) ~[spring-beans-5.3.24.jar:5.3.24] ... 35 common frames omittedCaused by: java.lang.IllegalStateException: Cannot load driver class: com.mysql.cj.jdbc.Driver at org.springframework.util.Assert.state(Assert.java:97) ~[spring-core-5.3.24.jar:5.3.24] at org.springframework.boot.autoconfigure.jdbc.DataSourceProperties.determineDriverClassName(DataSourceProperties.java:171) ~[spring-boot-autoconfigure-2.7.6.jar:2.7.6] at org.springframework.boot.autoconfigure.jdbc.DataSourceProperties.initializeDataSourceBuilder(DataSourceProperties.java:123) ~[spring-boot-autoconfigure-2.7.6.jar:2.7.6] at org.springframework.boot.autoconfigure.jdbc.DataSourceConfiguration.createDataSource(DataSourceConfiguration.java:48) ~[spring-boot-autoconfigure-2.7.6.jar:2.7.6] at org.springframework.boot.autoconfigure.jdbc.DataSourceConfiguration$Hikari.dataSource(DataSourceConfiguration.java:90) ~[spring-boot-autoconfigure-2.7.6.jar:2.7.6] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na] at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.3.24.jar:5.3.24] ... 36 common frames omittedProcess finished with exit code 1 그리고 yml도 좀 이상합니다

26강 듣는중간에 실행 시켰는데 오류가 나오네요섹션3까지는 문제없이 잘 됐습니다.Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.2024-05-26 21:37:17.517 ERROR 12508 --- [ main] o.s.boot.SpringApplication : Application run failedorg.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'dataSourceScriptDatabaseInitializer' defined in class path resource [org/springframework/boot/autoconfigure/sql/init/DataSourceInitializationConfiguration.class]: Unsatisfied dependency expressed through method 'dataSourceScriptDatabaseInitializer' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Hikari.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.zaxxer.hikari.HikariDataSource]: Factory method 'dataSource' threw exception; nested exception is java.lang.IllegalStateException: Cannot load driver class: com.mysql.cj.jdbc.Driver at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:541) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1352) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1195) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1154) ~[spring-context-5.3.24.jar:5.3.24] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:908) ~[spring-context-5.3.24.jar:5.3.24] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.24.jar:5.3.24] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:147) ~[spring-boot-2.7.6.jar:2.7.6] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:731) ~[spring-boot-2.7.6.jar:2.7.6] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408) ~[spring-boot-2.7.6.jar:2.7.6] at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) ~[spring-boot-2.7.6.jar:2.7.6] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1303) ~[spring-boot-2.7.6.jar:2.7.6] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1292) ~[spring-boot-2.7.6.jar:2.7.6] at com.group.libraryapp.LibraryAppApplication.main(LibraryAppApplication.java:10) ~[main/:na]Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Hikari.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.zaxxer.hikari.HikariDataSource]: Factory method 'dataSource' threw exception; nested exception is java.lang.IllegalStateException: Cannot load driver class: com.mysql.cj.jdbc.Driver at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:658) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:638) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1352) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1195) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1391) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1311) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:887) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791) ~[spring-beans-5.3.24.jar:5.3.24] ... 21 common frames omittedCaused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.zaxxer.hikari.HikariDataSource]: Factory method 'dataSource' threw exception; nested exception is java.lang.IllegalStateException: Cannot load driver class: com.mysql.cj.jdbc.Driver at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.3.24.jar:5.3.24] at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:653) ~[spring-beans-5.3.24.jar:5.3.24] ... 35 common frames omittedCaused by: java.lang.IllegalStateException: Cannot load driver class: com.mysql.cj.jdbc.Driver at org.springframework.util.Assert.state(Assert.java:97) ~[spring-core-5.3.24.jar:5.3.24] at org.springframework.boot.autoconfigure.jdbc.DataSourceProperties.determineDriverClassName(DataSourceProperties.java:171) ~[spring-boot-autoconfigure-2.7.6.jar:2.7.6] at org.springframework.boot.autoconfigure.jdbc.DataSourceProperties.initializeDataSourceBuilder(DataSourceProperties.java:123) ~[spring-boot-autoconfigure-2.7.6.jar:2.7.6] at org.springframework.boot.autoconfigure.jdbc.DataSourceConfiguration.createDataSource(DataSourceConfiguration.java:48) ~[spring-boot-autoconfigure-2.7.6.jar:2.7.6] at org.springframework.boot.autoconfigure.jdbc.DataSourceConfiguration$Hikari.dataSource(DataSourceConfiguration.java:90) ~[spring-boot-autoconfigure-2.7.6.jar:2.7.6] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na] at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.3.24.jar:5.3.24] ... 36 common frames omittedProcess finished with exit code 1 그리고 yml도 좀 이상합니다

안녕하세요! 지난 1탄 강의 잘 들었습니다.다름이 아니라 1탄과 2탄에서 go로 작성된 코드가 조금 다른거 같은데 혹시 누락된 강의가 있는걸까요 ?1탄에선 network 디렉토리에 network.go와 socket.go만 작성했었는데 2탄에선 server.go와 util.go가 생기면서 코드가 조금 변경된거 같습니다.누락된 강의가 없다면, 변경된 부분이 어떤 것들인지 알고싶어서 질문드립니다.

컴파일시 오류가 발생합니다.포트가 사용되고 있다고 하면서 웹서버 구동이 안되는데 포트를 바꿔봐도 오류가 발생합니다.깃허브에서 소스코드는 받았습니다.해결방법 좀 부탁드립니다. AI 답변이 달렸길래 추가 내용을 적습니다. 포트도 변경해봤고, 사용중인 포트가 없는것도 확인했습니다. 오류 코드는 다음과 같습니다.***************************APPLICATION FAILED TO START***************************Description:Web server failed to start. Port 8080 was already in use.Action:Identify and stop the process that's listening on port 8080 or configure this application to listen on another port.Process finished with exit code 1 

[제로초 강좌 질문 필독 사항입니다]세션 6번app.js 시퀄라이즈 싱크에 관한 문의 입니다.const { sequelize } = require('./models');app.js 에서 시퀄라이즈를 가져오는데 해당 모둘안에는 3개의 파일 있습니다 .( user, comment, index ) index 파일만 실행하면 될거 같은데 sequelize 자져오는 이유가 궁금하고 , 여기서 가르키는 sequelize 가 index에 있는 sequelize 인지 궁금합니다.

현재 spring boot 프로젝트를 GCP를 통해 배포하는 중인데요,rds 만들어서 연동도 잘 해두었고 ssh로 들어갔을때 mysql 연동도 잘 됩니다.근데 jar 파일로 서버를 실행하려고 할 때 이런 에러가 나더라구요ㅜㅜ 찾아보니까 mysql 연동 문제라고 하던데 아무리 봐도 모르겠습니다...제발 도와주세요ㅜㅜㅜ

기초반 들었는데 너무 쉽게 설명해주셔서 좋았어요중급반 들으러 갑니다

영상 실행은 되는데 화면이 검정색으로 뜨고 아무것도 안보여용...어제만 해도 별문제 없엇는데 확장프로그램 문제인가 해서 사파리로도 들어갔는데 똑같이 어둡게 나오네요...  혹시 다른 강의도 그런가 하고 다른분 강의 켜봤는데 그분 강의는 잘 화면이 나오고 여기 해당 강의만 어둡게나와요! 근데 아이패드로 접속해서 틀면 제대로 나오는데.. 노트북에서 보고 싶은데 해결방법이 뭘까요... 추가적으로 강력새로고침해서 캐시도 지워보고 시크릿모드에서도 해보고 다해봤는데도 같은 현상입니다. 혹시해서 확장프로그램 삭제하고 노트북도 껏다 켜봤습니닥 ㅠㅠ...

실무 요구사항에서 blob, text, 긴 varchar와 같은 칼럼을 인덱싱하는 경우가 있을까요?당장 기억나는건 게시글 내용 검색 밖에 생각이 안나네요.. 그리고 요 아래글에 나와있는 prefix index의 한계점도 맞는 말일까요?https://stackoverflow.com/questions/31526618/mysql-prefix-index-vs-index(아래는 챗지피티가 요약해준거라 정확하지 않을 수 있습니다 ㅠ)인덱스를 통해 "가능한" 행들을 먼저 찾고, 이후 실제 데이터 행을 검색하여 추가 필터링을 수행(두 단계를 거치므로 인덱스를 사용하지 않을때보다 더 많은 시간 소요..?)2.정렬(sorting)이나 그룹화(grouping) 작업에는 사용되지 않음.ORDER BY 절을 명시적으로 사용하지 않는 한 결과의 순서는 보장되지 않음커버링 인덱스로 사용 불가