请将上面回答中对应AdvertMapper.xml对应的AdvertMapper.java文件内容展示出来

好的，假设您的AdvertMapper.xml文件中包含了类似以下的内容：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
  "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
  
<mapper namespace="com.example.mapper.AdvertMapper">
  
  <select id="getAdvertById" parameterType="int" resultType="com.example.model.Advert">
    SELECT * FROM adverts WHERE id = #{id}
  </select>
  
  <insert id="insertAdvert" parameterType="com.example.model.Advert">
    INSERT INTO adverts (title, description, created_at) VALUES (#{title}, #{description}, #{createdAt})
  </insert>
  
  <update id="updateAdvert" parameterType="com.example.model.Advert">
    UPDATE adverts SET title = #{title}, description = #{description}, updated_at = #{updatedAt} WHERE id = #{id}
  </update>
  
  <delete id="deleteAdvert" parameterType="int">
    DELETE FROM adverts WHERE id = #{id}
  </delete>
  
</mapper>

那么对应的AdvertMapper.java文件应该是类似以下的内容：

package com.example.mapper;

import com.example.model.Advert;
import org.apache.ibatis.annotations.*;

public interface AdvertMapper {

  @Select("SELECT * FROM adverts WHERE id = #{id}")
  public Advert getAdvertById(int id);

  @Insert("INSERT INTO adverts (title, description, created_at) VALUES (#{title}, #{description}, #{createdAt})")
  public int insertAdvert(Advert advert);

  @Update("UPDATE adverts SET title = #{title}, description = #{description}, updated_at = #{updatedAt} WHERE id = #{id}")
  public int updateAdvert(Advert advert);

  @Delete("DELETE FROM adverts WHERE id = #{id}")
  public int deleteAdvert(int id);

}

请注意，上面这个Java接口中的方法名和参数类型、注解等需要与AdvertMapper.xml文件中的SQL语句对应。这样MyBatis才能正确地自动将Java对象和数据库表之间进行映射。