Caused by: java.lang.ClassNotFoundException: com.mysql.cj.jdbc.Driver

作者：我家小花儿 | 2024-04-29 12:01:52

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caused by: java.lang.classnotfoundexception: com.mysql.cj.jdbc.driver

Caused by: java.lang.ClassNotFoundException: com.mysql.cj.jdbc.Driver
at org.apache.catalina.loader.WebappClassLoader.loadClass (WebappClassLoader.java:1713)
at org.apache.catalina.loader.WebappClassLoader.loadClass (WebappClassLoader.java:1558)
at java.lang.Class.forName0 (Native Method)
at java.lang.Class.forName (Class.java:264)
at com.alibaba.druid.util.JdbcUtils.createDriver (JdbcUtils.java:518)
at com.alibaba.druid.pool.DruidDataSource.init (DruidDataSource.java:583)
at com.alibaba.druid.pool.DruidDataSource.getConnection (DruidDataSource.java:915)
at com.alibaba.druid.pool.DruidDataSource.getConnection (DruidDataSource.java:911)
at com.alibaba.druid.pool.DruidDataSource.getConnection (DruidDataSource.java:98)
at org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection (DataSourceUtils.java:151)
at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection (DataSourceUtils.java:115)
at org.springframework.jdbc.datasource.DataSourceUtils.getConnection (DataSourceUtils.java:78)
at org.springframework.jdbc.core.JdbcTemplate.execute (JdbcTemplate.java:600)
at org.springframework.jdbc.core.JdbcTemplate.query (JdbcTemplate.java:657)
at org.springframework.jdbc.core.JdbcTemplate.query (JdbcTemplate.java:688)
at org.springframework.jdbc.core.JdbcTemplate.query (JdbcTemplate.java:700)
at org.springframework.jdbc.core.JdbcTemplate.queryForObject (JdbcTemplate.java:778)
at cn.jx.dao.impl.UserDaoImpl.findUsername (UserDaoImpl.java:17)
at cn.jx.service.impl.UserServiceImpl.register (UserServiceImpl.java:11)
at cn.jx.web.servlet.RegisterUserServlet.doPost (RegisterUserServlet.java:58)
at javax.servlet.http.HttpServlet.service (HttpServlet.java:647)
at javax.servlet.http.HttpServlet.service (HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter (ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke (StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke (StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke (AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke (StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke (ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke (AccessLogValve.java:936)
at org.apache.catalina.core.StandardEngineValve.invoke (StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service (CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process (AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol $A b s t r a c t C o n n e c t i o n H a n d l e r . p r o c e s s (A b s t r a c t P r o t o c o l . j a v a : 589) a t o r g . a p a c h e . t o m c a t . u t i l . n e t . J I o E n d p o i n t$ SocketProcessor.run (JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:624)
at java.lang.Thread.run (Thread.java:748)

**个人原因：
将 druid连接池配置文件中的

	 com.mysql.cj.jdbc.Driver（这个类无法找到）
	替换成
	driverClassName=com.mysql.jdbc.Driver**
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