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这个checkLMDao是接口，为什么可以调方法？

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这个checkLMDao是接口，为什么可以调方法？

1.并没有实现类啊？
2.@Autowired有什么用？
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因为具体的实现方法是 mybatis帮你实现的.具体怎么实现的你可以深入研究一下


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