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Java: 31. Cannot load JDBC driver class 'org.mysql.jdbc.Driver' [링크 복사], [링크+제목 복사],
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Cannot load JDBC driver class 'org.mysql.jdbc.Driver'

이런 오류가 나는데,

HTTP Status 500 – Internal Server Error
Type Exception Report

Message Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException:

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot load JDBC driver class 'org.mysql.jdbc.Driver'
### The error may exist in org/example/repository/UserMapper.java (best guess)
### The error may involve org.example.repository.UserMapper.selectAll
### The error occurred while executing a query
### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot load JDBC driver class 'org.mysql.jdbc.Driver'
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014)
...[생략]...
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
Root Cause

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot load JDBC driver class 'org.mysql.jdbc.Driver'
### The error may exist in org/example/repository/UserMapper.java (best guess)
### The error may involve org.example.repository.UserMapper.selectAll
### The error occurred while executing a query
### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot load JDBC driver class 'org.mysql.jdbc.Driver'
    org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:75)
...[생략]...
    javax.servlet.http.HttpServlet.service(HttpServlet.java:733)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
Root Cause

org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot load JDBC driver class 'org.mysql.jdbc.Driver'
### The error may exist in org/example/repository/UserMapper.java (best guess)
### The error may involve org.example.repository.UserMapper.selectAll
### The error occurred while executing a query
### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot load JDBC driver class 'org.mysql.jdbc.Driver'
    org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:26)
...[생략]...
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
Root Cause

org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot load JDBC driver class 'org.mysql.jdbc.Driver'
    org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:82)
...[생략]...
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
Root Cause

org.apache.commons.dbcp.SQLNestedException: Cannot load JDBC driver class 'org.mysql.jdbc.Driver'
    org.apache.commons.dbcp.BasicDataSource.createConnectionFactory(BasicDataSource.java:1429)
...[생략]...
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
Root Cause

java.lang.ClassNotFoundException: org.mysql.jdbc.Driver
    org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1372)
...[생략]...
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
Note The full stack trace of the root cause is available in the server logs.

도대체 내가 본 예제 코드는 왜? 

<property name="driverClassName" value="org.mysql.jdbc.Driver" />

org.mysql.jdbc.Driver라는 드라이버를 사용한 걸까요? ^^; 이것을 해결하려면 지난번처럼 "com.mysql.cj.jdbc.Driver"로 바꿔야 합니다.

<property name="driverClassName" value="com.mysql.cj.jdbc.Driver" />



[이 글에 대해서 여러분들과 의견을 공유하고 싶습니다. 틀리거나 미흡한 부분 또는 의문 사항이 있으시면 언제든 댓글 남겨주십시오.]





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[최종 수정일: 8/9/2021]

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이 저작물은 크리에이티브 커먼즈 코리아 저작자표시-비영리-변경금지 2.0 대한민국 라이센스에 따라 이용하실 수 있습니다.
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