MyBatis-Plus添加mapper层选装件，扩展BaseMapper

1、在自定义注入器MySqlInjector上添加选装件方法

public class MySqlInjector extends DefaultSqlInjector {
    @Override
    public List<AbstractMethod> getMethodList(Class<?> mapperClass) {
        List<AbstractMethod> methodList = super.getMethodList(mapperClass);
        methodList.add(new InsertBatchSomeColumn());
        methodList.add(new AlwaysUpdateSomeColumnById());
        methodList.add(new LogicDeleteByIdWithFill());
        return methodList;
    }
}

2、创建MP配置文件MybatisPlusConfig，放在config目录下

@Configuration
public class MybatisPlusConfig {
    @Bean
    public MySqlInjector sqlInjector(){
        return new MySqlInjector();
    }
}

3、创建MyBaseMapper,继承BaseMapper，添加内置选装件方法

public interface MyBaseMapper<T> extends BaseMapper<T> {
    int insertBatchSomeColumn(List<T> entityList);
    int alwaysUpdateSomeColumnById(@Param(Constants.ENTITY) T entity);
    int deleteByIdWithFill(T entity);
}