org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.mybatis.spring.mapper.MapperScannerConfigurer#0' defined in class path resource [spring-mybatis.xml]: Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [spring-mybatis.xml]: Cannot resolve reference to bean 'druidDataSource' while setting bean property 'druidDataSource'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'druidDataSource' defined in class path resource [spring-mybatis.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.lang.String' to required type 'int' for property 'initialSize'; nested exception is java.lang.NumberFormatException: For input string: "${druid.initialSize}"
当我删除除（ClassName,url,pass,name）以外的配置时，报初始化错误- dataSource init error。该怎么解决？
关于连接池的配置基本是没有问题的。
之前用DBCP的连接池，总是显示找不到${driver}。。
求求大神 帮看看是为什么。
