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问题所在：
Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanInitializationException: Could not load properties; nested exception is java.io.FileNotFoundException: Could not open ServletContext resource [/jdbc.properties]
问题分析：
大概意思就是这个[/jdbc.properties]找不到。
问题解决：
在引入外部文件时，location加上classpath：