ERROR SqlExceptionHelper:146 - 调用中无效的参数

Question

10:53:26,259 ERROR UserDaoImpl:43 - org.hibernate.exception.GenericJDBCException: Could not open connection
10:53:26,268 INFO StatisticalLoggingSessionEventListener:275 - Session Metrics {
330065 nanoseconds spent acquiring 1 JDBC connections;
0 nanoseconds spent releasing 0 JDBC connections;
4604078 nanoseconds spent preparing 1 JDBC statements;
0 nanoseconds spent executing 0 JDBC statements;
0 nanoseconds spent executing 0 JDBC batches;
0 nanoseconds spent performing 0 L2C puts;
0 nanoseconds spent performing 0 L2C hits;
0 nanoseconds spent performing 0 L2C misses;
63145043 nanoseconds spent executing 1 flushes (flushing a total of 1 entities and 0 collections);
0 nanoseconds spent executing 0 partial-flushes (flushing a total of 0 entities and 0 collections)
}
用的是spring加载c3p0连接池，真不知道问题在哪里
<!-- 配置数据源 -->


<!-- 指定连接数据库的驱动-->

${datasource.driverClassName}
<!-- 指定连接数据库的URL-->

${datasource.url}
<!-- 指定连接数据库的用户名-->

${datasource.username}
<!-- 指定连接数据库的密码-->
${datasource.password}

Answer 1

数据库连接驱动jar导入了吗？参数配置正确了吗？