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Entity层、DAO层、Service层、Controller层 先后顺序
2022-07-07 21:52:00 【狂野小白兔】
写法顺序:
1.数据库表
2.实体层
3.DAO层写接口
4.Mapper层写和DAO层对应的映射规则,即SQL和POJO的映射规则。其中<select>元素定义的resultType指向实体层的表;
5.Service层
6.ServiceImpl
7.Controller层
Note:Service层应该既调用DAO层的接口,接收DAO层返回的数据,又要提供接口给Controller层的类来进行调用。
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