@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({})
public @interface Result {
boolean id() default false;

String column() default "";

String property() default "";

Class javaType() default void.class;

JdbcType jdbcType() default JdbcType.UNDEFINED;

Class typeHandler() default UnknownTypeHandler.class;

One one() default @One;

Many many() default @Many;
}

Result 类映射了一个列，需要注意：
One one() default @One;
Many many() default @Many;