MapperScan导致的启动报错

SpringBoot 整合mybatis,启动报错

1.报错信息

org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.stoneppy.ec.service.LoginService.getPassword
	at org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>(MapperMethod.java:235)
	at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:53)
	at org.apache.ibatis.binding.MapperProxy.lambda$cachedInvoker$0(MapperProxy.java:115)
	at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660)
	at org.apache.ibatis.binding.MapperProxy.cachedInvoker(MapperProxy.java:102)
	at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:85)
	at com.sun.proxy.$Proxy100.getPassword(Unknown Source)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
	at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:88)
	at com.stoneppy.ec.aspect.LogAnnotationAspect.testAround(LogAnnotationAspect.java:36)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:644)
	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:633)
	at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:95)

2.报错2

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'loginServiceImpl': Unsatisfied dependency expressed through field 'userMapper'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.stoneppy.ec.mapper.UserMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:643)
	at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:130)
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1420)

出现第一种现象

@SpringBootApplication
@EnableEurekaClient
@MapperScan("com.stoneppy.ec")
@EnableCircuitBreaker
public class EcServerApplication {

    public static void main(String[] args) {
        SpringApplication.run(EcServerApplication.class, args);
    }

}

出现第二种现象

@SpringBootApplication
@EnableEurekaClient
@MapperScan("com.stoneppy.ec.mapper.*")
@EnableCircuitBreaker
public class EcServerApplication {

    public static void main(String[] args) {
        SpringApplication.run(EcServerApplication.class, args);
    }

}

mapperScan 的具体作用

作用：扫描指定包下所有的接口类，然后所有接口在编译之后都会生成相应的实现类
位置：是在SpringBoot启动类上面添加，
SpringBootApplication 启动类
@MapperScan(“com.springboot.mapper”)
@SpringBootApplication
public class SpringBootApplication {
public static void main(String[] args) {
SpringApplication.run(SpringBootApplication.class, args);
}
}

添加 @MapperScan(“com.springboot.mapper”) 注解以后，扫描 com.springboot.mapper 包下面所有的接口类，在编译之后都会生成相应的实现类。

注意：是该包下的所有接口类都会生成一个实现类

出现一的原因：

包下面有loginService和userMapper两个接口，都创建了对应的实现类，而loginService本身有实现类LoginServiceImpl导致autoWired赵不到对应的类进行自动注入

出现二的原因：

默认为查找包下面的所有类，没有该类写法，，可能是获取*下面的子包了，，，百度无果 。。。。。