在一个SSM分布式项目中一个服务报错：
### Error querying database. Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLException: ${jdbc.driver} ### The error may exist in com/pinyougou/mapper/TbGoodsMapper.xml ### The error may involve com.pinyougou.mapper.TbGoodsMapper.selectByPrimaryKey ### The error occurred while executing a query ### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLException: ${jdbc.driver} at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:26) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:111) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:66) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:358) ... 16 more
获取不到数据池连接，其他service都好好的。最后发现是数据库配置文件没有读取的原因
<!-- 加载配置文件 -->
<context:property-placeholder location="classpath*:properties/*.properties" />
Could not get JDBC Connection; nested exception is java.sql.SQLException: ${jdbc.driver}
原文：https://www.cnblogs.com/zeussbook/p/11492530.html