Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException:
Error creating bean with name 'userController': Unsatisfied dependency expressed through field 'userService';
nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException:
No qualifying bean of type 'com.boron.service.UserService' available: expected at least 1 bean which qualifies as autowire candidate.
Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
原因：service层没有加注解
在搭spring mvc框架时，ide不会报错但会有编译错误的几个注意事项：
1.controller 加注解
@Controller 而不是@RestController
@RequestMapping("/user")
2.service加注解
@Service
@Autowired
3.dao 加注解和实现接口
@Param("")
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