Spring MySQL 연결 오류

발생 환경

• SpringBoot v3.2.3
• MySQL 8.1

문제점

• application.properties

  spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

  Cannot resolve class or package 'mysql'
  Cannot resolve class or package 'cj'
  Cannot resolve class or package 'jdbc'
  Cannot resolve class 'Driver'

• gradle build 시

  User
  Starting a Gradle Daemon, 3 stopped Daemons could not be reused, use --status for details
  > Task :compileJava FAILED
  
  FAILURE: Build failed with an exception.
  
  * What went wrong:
  Execution failed for task ':compileJava'.
  > Could not resolve all files for configuration ':compileClasspath'.
     > Could not find mysql:mysql-connector-java:8.1.0.
       Required by:
           project :
  
  * Try:
  > Run with --stacktrace option to get the stack trace.
  > Run with --info or --debug option to get more log output.
  > Run with --scan to get full insights.
  > Get more help at https://help.gradle.org.
  
  BUILD FAILED in 3s
  2 actionable tasks: 2 executed

문제 탐색

build.gradle

implementation 'mysql:mysql-connector-java'

MySQL과 연결하기 위하여 build.gradle 파일에서 의존성을 추가하였지만, 이제 mysql:mysql-connector-java 의 네이밍이 변경됨.

해결

mysql:mysql-connector-java → com.mysql:mysql-connector-j 로 변경

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참고문헌

https://luvstudy.tistory.com/221

https://blogs.oracle.com/mysql/post/mysql-connectorj-has-new-maven-coordinates