解决： nested exception is

Mybatis结合Spring报错：

: nested exception is : Expected one result (or null) to be returned by selectOne(), but found: 6
	at (:92)
	at $(:440)
	at .$(Unknown Source)
	at (:159)
	at (:87)
	at $(:152)
	at (:85)
	at .$(Unknown Source)

解决方法：

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