MyBatis中的mapping.xml和dao层接口组合使用

本是古典何须时尚 2022-05-22 01:35 140阅读 0赞

Springboot与mybatis整合

在application.properties文件中

mybatis.mapper-locations=classpath*:mapping/*.xml

mybatis中的mapping.xml的与Dao层组合使用

bean实体类

(@Data相当于给属性给设置set和get，相关资料 https://blog.csdn.net/u010931123/article/details/80510849

@Data

@AllArgsConstructor
    @NoArgsConstructor

public class FjsTic \{    private String spchCode;    private String settMonth;    private String ticType;    private String ticAccAddress;    private String ticAccP;    private String ticTelephone;    private String companyName;    private String taxpayerNum;    private String taxpayerAddress;    private String taxpayerTelephone;    private String taxpayerBankname;    private String taxpayerAccountname;    private String taxpayerAccountno; \}

FjsTicMapper.xml(位置为src/main/resource/mapping/FjsTicMapper.xml)

![20180612153417953][]

说明：

resultMap中的result中的property与实体类属性一致，column中的数据库表的字段值一致

select中的id与Dao层中的方法一样

parameterType参数类型

<?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.baidu.test.dao.FjsTicDao">
    
        <resultMap id="fjsTicResultMap" type="com.baidu.test.entity.FjsTic">
            <result property="spchCode" column="spch_code"/>
            <result property="settMonth" column="sett_month"/>
            <result property="ticType" column="tic_type"/>
            <result property="ticAccAddress" column="tic_acc_address"/>
            <result property="ticAccP" column="tic_acc_p"/>
            <result property="ticTelephone" column="tic_telephone"/>
            <result property="companyName" column="company_name"/>
            <result property="taxpayerNum" column="taxpayer_num"/>
            <result property="taxpayerAddress" column="taxpayer_address"/>
            <result property="taxpayerTelephone" column="taxpayer_telephone"/>
            <result property="taxpayerBankname" column="taxpayer_bankname"/>
            <result property="taxpayerAccountname" column="taxpayer_accountname"/>
            <result property="taxpayerAccountno" column="taxpayer_accountno"/>
        </resultMap>
    <select id="queryFjsTicExport" parameterType="String" resultMap="fjsTicResultMap">
            SELECT
              *
            FROM
              agm_fjs_tic
            WHERE file_id=#{fileId}
        </select>
    </mapper>

Dao层：

@Mapper
    public interface FjsTicDao {
    
        List<FjsTic> queryFjsTicExport(@Param("fileId") String fileId);

@AllArgsConstructor
    @NoArgsConstructor

[20180612153417953]: /images/20220522/2d7316b30bfa44a191c22a5543fe6873.png