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Published 20 hours ago • verified publisher icon lihengming

UserserviceImpl中的private UserMapper userMapper有什么用？

Open WendellHe opened this issue 6 years ago • 1 comments

UserserviceImpl.java 中有句 private UserMapper userMapper； 把它注释了对项目没什么影响！ 请问注入userMapper 的作用是什么？

WendellHe avatar Aug 27 '18 07:08 WendellHe

是为了让你实现dao层时用的，一般的增删改查是用不着，自定义的会用到

a173030685 avatar Aug 27 '18 08:08 a173030685