解决两个SSM项目整合Hikari数据库连接池遇到的问题

解决两个SSM项目整合Hikari数据库连接池遇到的问题

• 问题一：
• • 错误的配置
  • • jdbc.properties中关于Hikari连接池的配置
    • application.xml中关于Hikari连接池的配置
  • 报错信息
  • 报错原因分析
  • 正确的配置
  • • jdbc.properties中关于关于Hikari连接池的配置
    • application.xml中关于关于Hikari连接池的配置
• 问题二：
• • 报错信息
  • 报错原因分析
  • 正确的的配置
  • • jdbc.properties中关于关于Hikari连接池的配置
    • application.xml中关于关于Hikari连接池的配置

今天在维护一个老SSM项目的时候，想提升系统在连接数据库时候的性能，把原来的C3P0连接池换成了Hikari连接池，但是期间也碰到了一些问题：

问题一：

参考Hikari的官方GitHub的说明，地址: https://github.com/brettwooldridge/HikariCP/wiki/MySQL-Configuration ，连接MySQL数据库的时候只需要配置三个参数，jdbcUrl，username，password，如下图所示。

错误的配置

jdbc.properties中关于Hikari连接池的配置

jdbcUrl=jdbc:mysql://39.97.3.120:3306/error_discrimination?useUnicode=true&characterEncoding=utf8
username=root
password=123

application.xml中关于Hikari连接池的配置

<!-- 加载配置文件 -->
<context:property-placeholder location="classpath:jdbc.properties" />

<!-- 数据库连接池 -->
<bean id="dataSource" class="com.zaxxer.hikari.HikariDataSource">
	<property name="jdbcUrl" value="${jdbcUrl}" />
	<property name="username" value="${username}" />
	<property name="password" value="${password}" />
</bean>

报错信息

严重: Servlet.service() for servlet [Sample] in context with path [/Sample_Data_Storage] threw exception [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: Could not get JDBC Connection; nested exception is java.sql.SQLException: Access denied for user 'CandyWall'@'117.136.2.47' (using password: YES)
### The error may exist in top/jacktgq/sample_data_storage/mapper/UserinfoMapper.xml
### The error may involve top.jacktgq.sample_data_storage.mapper.UserinfoMapper.checkUserLogin
### The error occurred while executing a query
### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLException: Access denied for user 'CandyWall'@'117.136.2.47' (using password: YES)] with root cause
java.sql.SQLException: Access denied for user 'CandyWall'@'117.136.2.47' (using password: YES)
	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3878)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3814)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:871)
	at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1694)
	at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1215)
	at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2255)
	at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2286)
	at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2085)
	at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:795)
	at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:44)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at com.mysql.jdbc.Util.handleNewInstance(Util.java:404)
	at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:400)
	at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:327)
	at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138)
	at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:358)
	at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:206)
	at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:477)
	at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:560)
	at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115)
	at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112)
	at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:111)
	at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77)
	at org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:82)
	at org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:68)
	at org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:279)
	at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:72)
	at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:59)
	at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:267)
	at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:137)
	at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:96)
	at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:77)
	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:108)
	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102)
	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:66)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:386)
	at com.sun.proxy.$Proxy31.selectOne(Unknown Source)
	at org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:165)
	at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:68)
	at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:52)
	at com.sun.proxy.$Proxy49.checkUserLogin(Unknown Source)
	at top.jacktgq.sample_data_storage.service.impl.UserinfoServiceImpl.checkUserLogin(UserinfoServiceImpl.java:22)
	at top.jacktgq.sample_data_storage.controller.UserinfoController.checkUserLogin(UserinfoController.java:23)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:776)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:705)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
	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.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	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:502)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:748)

报错原因分析

经过百度查阅资料之后了解到，Spring整合Hikari的时候使用${}取jdbc.properties中的参数的时候不能想当然，必须指定为 jdbc.url，jdbc.username, jdbc.password，否则不能识别到，因此正确的配置应该为：

正确的配置

jdbc.properties中关于关于Hikari连接池的配置

jdbc.url=jdbc:mysql://39.97.3.120:3306/error_discrimination?useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=123

application.xml中关于关于Hikari连接池的配置

<!-- 加载配置文件 -->
<context:property-placeholder location="classpath:jdbc.properties" />

<!-- 数据库连接池 -->
<bean id="dataSource" class="com.zaxxer.hikari.HikariDataSource">
	<property name="jdbcUrl" value="${jdbc.url}" />
	<property name="username" value="${jdbc.username}" />
	<property name="password" value="${jdbc.password}" />
</bean>

将关于Hikari数据库连接池的相关配置改成spring支持的格式后，项目就在我的电脑本地启动了（我是用maven提供的tomcat插件启动的），也能正确连接数据库。

问题二：

将项目打包后在服务器部署，又报了如下错误：

报错信息

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: java.lang.RuntimeException: Failed to get driver instance for jdbcUrl=jdbc:mysql://39.97.3.120:3306/error_discrimination?useUnicode=true&characterEncoding=utf8
### The error may exist in top/jacktgq/sample_data_storage/mapper/UserinfoMapper.xml
### The error may involve top.jacktgq.sample_data_storage.mapper.UserinfoMapper.checkUserLogin
### The error occurred while executing a query
### Cause: java.lang.RuntimeException: Failed to get driver instance for jdbcUrl=jdbc:mysql://39.97.3.120:3306/error_discrimination?useUnicode=true&characterEncoding=utf8
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:978)
	org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
root cause

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: java.lang.RuntimeException: Failed to get driver instance for jdbcUrl=jdbc:mysql://39.97.3.120:3306/error_discrimination?useUnicode=true&characterEncoding=utf8
### The error may exist in top/jacktgq/sample_data_storage/mapper/UserinfoMapper.xml
### The error may involve top.jacktgq.sample_data_storage.mapper.UserinfoMapper.checkUserLogin
### The error occurred while executing a query
### Cause: java.lang.RuntimeException: Failed to get driver instance for jdbcUrl=jdbc:mysql://39.97.3.120:3306/error_discrimination?useUnicode=true&characterEncoding=utf8
	org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:76)
	org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:399)
	com.sun.proxy.$Proxy21.selectOne(Unknown Source)
	org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:165)
	org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:68)
	org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:52)
	com.sun.proxy.$Proxy40.checkUserLogin(Unknown Source)
	top.jacktgq.sample_data_storage.service.impl.UserinfoServiceImpl.checkUserLogin(UserinfoServiceImpl.java:22)
	top.jacktgq.sample_data_storage.controller.UserinfoController.checkUserLogin(UserinfoController.java:23)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.lang.reflect.Method.invoke(Method.java:498)
	org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
	org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
	org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:776)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:705)
	org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)
	org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
root cause

org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: java.lang.RuntimeException: Failed to get driver instance for jdbcUrl=jdbc:mysql://39.97.3.120:3306/error_discrimination?useUnicode=true&characterEncoding=utf8
### The error may exist in top/jacktgq/sample_data_storage/mapper/UserinfoMapper.xml
### The error may involve top.jacktgq.sample_data_storage.mapper.UserinfoMapper.checkUserLogin
### The error occurred while executing a query
### Cause: java.lang.RuntimeException: Failed to get driver instance for jdbcUrl=jdbc:mysql://39.97.3.120:3306/error_discrimination?useUnicode=true&characterEncoding=utf8
	org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:26)
	org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:111)
	org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102)
	org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:66)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.lang.reflect.Method.invoke(Method.java:498)
	org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:386)
	com.sun.proxy.$Proxy21.selectOne(Unknown Source)
	org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:165)
	org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:68)
	org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:52)
	com.sun.proxy.$Proxy40.checkUserLogin(Unknown Source)
	top.jacktgq.sample_data_storage.service.impl.UserinfoServiceImpl.checkUserLogin(UserinfoServiceImpl.java:22)
	top.jacktgq.sample_data_storage.controller.UserinfoController.checkUserLogin(UserinfoController.java:23)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.lang.reflect.Method.invoke(Method.java:498)
	org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
	org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
	org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:776)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:705)
	org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)
	org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
root cause

java.lang.RuntimeException: Failed to get driver instance for jdbcUrl=jdbc:mysql://39.97.3.120:3306/error_discrimination?useUnicode=true&characterEncoding=utf8
	com.zaxxer.hikari.util.DriverDataSource.<init>(DriverDataSource.java:114)
	com.zaxxer.hikari.pool.PoolBase.initializeDataSource(PoolBase.java:325)
	com.zaxxer.hikari.pool.PoolBase.<init>(PoolBase.java:114)
	com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:108)
	com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112)
	org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:111)
	org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77)
	org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:82)
	org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:68)
	org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:279)
	org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:72)
	org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:59)
	org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:267)
	org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:137)
	org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:96)
	org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:77)
	org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:108)
	org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102)
	org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:66)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.lang.reflect.Method.invoke(Method.java:498)
	org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:386)
	com.sun.proxy.$Proxy21.selectOne(Unknown Source)
	org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:165)
	org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:68)
	org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:52)
	com.sun.proxy.$Proxy40.checkUserLogin(Unknown Source)
	top.jacktgq.sample_data_storage.service.impl.UserinfoServiceImpl.checkUserLogin(UserinfoServiceImpl.java:22)
	top.jacktgq.sample_data_storage.controller.UserinfoController.checkUserLogin(UserinfoController.java:23)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.lang.reflect.Method.invoke(Method.java:498)
	org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
	org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
	org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:776)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:705)
	org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)
	org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
root cause

java.sql.SQLException: No suitable driver
	java.sql.DriverManager.getDriver(DriverManager.java:315)
	com.zaxxer.hikari.util.DriverDataSource.<init>(DriverDataSource.java:106)
	com.zaxxer.hikari.pool.PoolBase.initializeDataSource(PoolBase.java:325)
	com.zaxxer.hikari.pool.PoolBase.<init>(PoolBase.java:114)
	com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:108)
	com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112)
	org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:111)
	org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77)
	org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:82)
	org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:68)
	org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:279)
	org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:72)
	org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:59)
	org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:267)
	org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:137)
	org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:96)
	org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:77)
	org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:108)
	org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102)
	org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:66)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.lang.reflect.Method.invoke(Method.java:498)
	org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:386)
	com.sun.proxy.$Proxy21.selectOne(Unknown Source)
	org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:165)
	org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:68)
	org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:52)
	com.sun.proxy.$Proxy40.checkUserLogin(Unknown Source)
	top.jacktgq.sample_data_storage.service.impl.UserinfoServiceImpl.checkUserLogin(UserinfoServiceImpl.java:22)
	top.jacktgq.sample_data_storage.controller.UserinfoController.checkUserLogin(UserinfoController.java:23)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.lang.reflect.Method.invoke(Method.java:498)
	org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
	org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
	org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:776)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:705)
	org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)
	org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

报错原因分析

看到这个错误我是崩溃的，经过网上一番搜索和分析错误信息，这一行报错信息引起了我的注意

java.sql.SQLException: No suitable driver

翻译过来就是没有找到合适的驱动，我去服务器的tomcat中发布的项目的lib目录下仔细看了看，MySQL驱动也在啊，怎么会报这个错误呢？经过认真推敲，我报着试一试的心态在jdbc.properties和application.xml文件中指定了jdbc的驱动，，然后数据库就能正常访问了，看来官方的配置也不能全信啊！具体配置如下：

正确的的配置

jdbc.properties中关于关于Hikari连接池的配置

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://39.97.3.120:3306/error_discrimination?useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=123

application.xml中关于关于Hikari连接池的配置

<!-- 加载配置文件 -->
<context:property-placeholder location="classpath:jdbc.properties" />

<!-- 数据库连接池 -->
<bean id="dataSource" class="com.zaxxer.hikari.HikariDataSource">
	<property name="driverClassName" value="${jdbc.driver}" />
	<property name="jdbcUrl" value="${jdbc.url}" />
	<property name="username" value="${jdbc.username}" />
	<property name="password" value="${jdbc.password}" />
</bean>

到此项目无论在本地还是服务器上都能正常运行了。