春天3.2.9;瓷砖2.0.7;init方法的调用失败;嵌套的异常. lang。IllegalArgumentException:没有指定的数据源

I'm trying to update our Spring project from 2.5.6 to 3.2.9. We're using Tiles 2.0.7, and Spring Web Flow 2.3. I'm stuck on an error that doesn't have a relevant solution in Stack Overflow or in other forums: (Partial Stacktrace):I'm trying to update our Spring project from 2.