[Java知识库]Mybatis框架使用之mapper接口不被spring容器识别

Mybatis框架使用之mapper接口不被spring容器识别

原因：mapper接口上面只单单添加一个@Mapper注解不够，这个是Mybatis的注解.还必须添加spring的注解如@Repositoty

@Repository
@Mapper
public interface MyBookMapper{
   
}

//==========================Sprng的注解Repository 
package org.springframework.stereotype;

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.springframework.core.annotation.AliasFor;

@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Component
public @interface Repository {
    @AliasFor(
        annotation = Component.class
    )
    String value() default "";
}


//==========================Mybatis的注解Mapper 
package org.apache.ibatis.annotations;

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Inherited;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Documented
@Inherited
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.TYPE, ElementType.METHOD, ElementType.FIELD, ElementType.PARAMETER})
public @interface Mapper {
}