1.并没有实现类啊？2.@Autowired有什么用？
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Because the specific implementation method is implemented for you by mybatis. You can study it in depth
@Autowired
@AutowiredYou can annotate member variables, methods and constructors to complete automatic assembly.
To put it simply: Spring helps you find a class that implements this interface and instantiates the marked variable.
Because the variable is marked @Autowired.
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Because the specific implementation method is implemented for you by mybatis. You can study it in depth
1. What is the use of
@Autowired?To put it simply: Spring helps you find a class that implements this interface and instantiates the marked variable.
2. There is no implemented class?
Because the variable is marked
@Autowired.