Springboot中获取SqlSession后执行selectList报错，请问如何解决

//代码信息

public List<Map<String, Object>> selectListSql( String sqlID, Map<String, Object> params) {
List<Map<String, Object>> results = null;
SqlSession session=null;
try {
session=sqlSessionFactory.openSession();
results = session.selectList(sqlID,params);
} catch (Exception e) {
log.error("【SqlShellConfig】selectListSql查询失败:" + e.getMessage());
} finally {
if (null != session)
session.close();
}
return results;
}

//错误信息

2017-11-05 22:57:02.556 ERROR 9264 --- [p-nio-80-exec-1] o.a.tomcat.jdbc.pool.ConnectionPool : Unable to create initial connections of pool.

java.sql.SQLException: Unable to load class: driver from ClassLoader:sun.misc.Launcher$AppClassLoader@3e58f124;ClassLoader:TomcatEmbeddedWebappClassLoader

context: web

delegate: true

----------> Parent Classloader:

sun.misc.Launcher$AppClassLoader@3e58f124

at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:283) ~[tomcat-jdbc-8.5.23.jar:na]

at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:203) ~[tomcat-jdbc-8.5.23.jar:na]

at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:735) [tomcat-jdbc-8.5.23.jar:na]

at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:667) [tomcat-jdbc-8.5.23.jar:na]

at org.apache.tomcat.jdbc.pool.ConnectionPool.init(ConnectionPool.java:482) [tomcat-jdbc-8.5.23.jar:na]

at org.apache.tomcat.jdbc.pool.ConnectionPool.<init>(ConnectionPool.java:154) [tomcat-jdbc-8.5.23.jar:na]

at org.apache.tomcat.jdbc.pool.DataSourceProxy.pCreatePool(DataSourceProxy.java:118) [tomcat-jdbc-8.5.23.jar:na]

at org.apache.tomcat.jdbc.pool.DataSourceProxy.createPool(DataSourceProxy.java:107) [tomcat-jdbc-8.5.23.jar:na]

at org.apache.tomcat.jdbc.pool.DataSourceProxy.getConnection(DataSourceProxy.java:131) [tomcat-jdbc-8.5.23.jar:na]

at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:111) [spring-jdbc-4.3.12.RELEASE.jar:4.3.12.RELEASE]

at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77) [spring-jdbc-4.3.12.RELEASE.jar:4.3.12.RELEASE]

at org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:81) [mybatis-spring-1.2.2.jar:1.2.2]

at org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:67) [mybatis-spring-1.2.2.jar:1.2.2]

at org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:279) [mybatis-3.2.8.jar:3.2.8]

at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:72) [mybatis-3.2.8.jar:3.2.8]

at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:59) [mybatis-3.2.8.jar:3.2.8]

at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:267) [mybatis-3.2.8.jar:3.2.8]

at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:137) [mybatis-3.2.8.jar:3.2.8]

at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:96) [mybatis-3.2.8.jar:3.2.8]

at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:77) [mybatis-3.2.8.jar:3.2.8]

at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:108) [mybatis-3.2.8.jar:3.2.8]

at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102) [mybatis-3.2.8.jar:3.2.8]

at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:98) [mybatis-3.2.8.jar:3.2.8]

at com.itbofeng.springbootmybatis.config.SqlShellConfig.selectListSql(SqlShellConfig.java:25) [classes/:na]

at com.itbofeng.springbootmybatis.service.UserService.selectAll(UserService.java:15) [classes/:na]

at com.itbofeng.springbootmybatis.controller.UserController.getAllUsers(UserController.java:16) [classes/:na]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.0_71]

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:1.7.0_71]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.7.0_71]

at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_71]

at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) [spring-web-4.3.12.RELEASE.jar:4.3.12.RELEASE]

at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133) [spring-web-4.3.12.RELEASE.jar:4.3.12.RELEASE]

at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97) [spring-webmvc-4.3.12.RELEASE.jar:4.3.12.RELEASE]

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) [spring-webmvc-4.3.12.RELEASE.jar:4.3.12.RELEASE]

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) [spring-webmvc-4.3.12.RELEASE.jar:4.3.12.RELEASE]

at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) [spring-webmvc-4.3.12.RELEASE.jar:4.3.12.RELEASE]

at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967) [spring-webmvc-4.3.12.RELEASE.jar:4.3.12.RELEASE]

at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901) [spring-webmvc-4.3.12.RELEASE.jar:4.3.12.RELEASE]

at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) [spring-webmvc-4.3.12.RELEASE.jar:4.3.12.RELEASE]

at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861) [spring-webmvc-4.3.12.RELEASE.jar:4.3.12.RELEASE]

at javax.servlet.http.HttpServlet.service(HttpServlet.java:635) [tomcat-embed-core-8.5.23.jar:8.5.23]

at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) [spring-webmvc-4.3.12.RELEASE.jar:4.3.12.RELEASE]

at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) [tomcat-embed-core-8.5.23.jar:8.5.23]

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) [tomcat-embed-core-8.5.23.jar:8.5.23]