spring/springMVC/mybatis（持久层、业务层、控制层思路小结）

  public class Province {
        private Integer id;
        private String code;
        private String name;


        // 构造方法，SET/GET，toString，实现Serializable
    }


    public class City {
        private Integer id;
        private String provinceCode;
        private String code;
        private String name;


        // 构造方法，SET/GET，toString，实现Serializable
    }


    public class Area {
        private Integer id;
        private String cityCode;
        private String code;
        private String name;


        // 构造方法，SET/GET，toString，实现Serializable
    }

 /**
     * 获取所有省的列表
     */
    List<Province> getProvinceList();



    /**
     * 根据省的代号，获取省的信息
     */
    Province getProvinceByCode(String provinceCode);

<mapper namespace="cn.tedu.store.mapper.ProvinceMapper">
        
        <!-- 获取所有省的列表 -->
        <!-- List<Province> getProvinceList() -->
        <select id="getProvinceList"
            resultType="cn.tedu.store.entity.Province">
            SELECT
                id,
                province_code   AS code,
                province_name   AS name
            FROM
                t_dict_provinces
        </select>


        <!-- 根据省的代号，获取省的信息 -->
        <!-- Province getProvinceByCode(String provinceCode) -->
        <select id="getProvinceByCode"
            resultType="cn.tedu.store.entity.Province">
            SELECT
                id,
                province_code   AS code,
                province_name   AS name
            FROM
                t_dict_provinces
            WHERE
                province_code=#{provinceCode}
        </select>


    </mapper>
    

 /**
     * 获取所有省的列表
     */
    List<Province> getProvinceList();



    /**
     * 根据省的代号，获取省的信息
     */
    Province getProvinceByCode(String provinceCode);

public List<Province> getProvinceList() {
        return provinceMapper.getProvinceList();
    }


    public Province getProvinceByCode(String provinceCode) {
        return provinceMapper.getProvinceByCode(provinceCode);
    }