项目启动时报错：
Description
An attempt was made to call a method that does not exist. The attempt was made from the following location:
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.省略
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The method's class, javax.persistence.PersistenceContext, is available from the following locations:
file:/E:/maven/sprboot-mysql/lib/javax.persistence.jar
Action:
Correct the classpath of your application so that it contains a single, compatible version of javax.persistence.PersistenceContext
原因： file:/E:/maven/sprboot-mysql/lib/javax.persistence.jar 这个文件夹中的jar包冲突
解决方法： 从file:/E:/maven/sprboot-mysql/lib文件夹中找到冲突的jar包，然后删除。
