使用MyBatis批量查询(select)、批量插入(insert)、批量更新(update)、批量删除(delete)

记录：412

场景：使用MyBatis批量查询(select)、批量插入(insert)、批量更新(update)、批量删除(delete)操作MySQL数据库。

版本：JDK 1.8,Spring Boot 2.6.3,mybatis-3.5.9,MySQL-5.7.33。

1.批量查询

提供两种方式。

方式一，返回值： List<CityPO>。

方式二，返回值： List<Map<String, Object>>。

1.1在CityBatchMapper中接口代码

@Repository
public interface CityBatchMapper {// 1.1批量查询List<CityPO> queryCity1_1(List<Long> paraList);// 2.1批量查询
}

1.2 在CityBatchMapper.xml中SQL代码

<?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.hub.example.mapper.CityBatchMapper"><!--1.1批量查询--><select id="queryCity1_1" parameterType="java.util.ArrayList" resultType="com.hub.example.domain.CityPO">select CITY_ID AS "cityId",CITY_NAME AS "cityName",LAND_AREA AS "landArea",POPULATION AS "population",GROSS AS "gross",CITY_DESCRIBE AS "cityDescribe",DATA_YEAR AS "dataYear",UPDATE_TIME AS "updateTime"from t_cityWHERE CITY_ID IN<foreach collection="list" item="cityId" open="(" separator="," close=")">#{cityId}</foreach></select><!--2.1批量查询--><select id="queryCity2_1" resultType="java.util.Map">select CITY_ID AS "cityId",CITY_NAME AS "cityName",LAND_AREA AS "landArea",POPULATION AS "population",GROSS AS "gross",CITY_DESCRIBE AS "cityDescribe",DATA_YEAR AS "dataYear",UPDATE_TIME AS "updateTime"from t_cityWHERE CITY_ID IN<foreach collection="list" item="cityId" open="(" separator="," close=")">#{cityId}</foreach></select>
</mapper>

2.批量插入

2.1在CityBatchMapper中接口代码

@Repository
public interface CityBatchMapper {// 1.2批量插入int insertCity1_2(List<CityPO> cityList);// 2.2批量插入int insertCity2_2(List<Map<String, Object>> cityList);
}

2.2 在CityBatchMapper.xml中SQL代码

<?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.hub.example.mapper.CityBatchMapper"><!--1.2批量插入--><insert id="insertCity1_2" parameterType="java.util.ArrayList">insert into t_city_01 (CITY_ID,CITY_NAME,LAND_AREA,POPULATION,GROSS,CITY_DESCRIBE,DATA_YEAR,UPDATE_TIME)values<foreach collection="list" item="cityPO" open="" separator="," close="">(#{cityPO.cityId},#{cityPO.cityName},#{cityPO.landArea},#{cityPO.population},#{cityPO.gross},#{cityPO.cityDescribe},#{cityPO.dataYear},#{cityPO.updateTime})</foreach></insert><!--2.2批量插入--><insert id="insertCity2_2" parameterType="java.util.List">insert into t_city_01 (CITY_ID,CITY_NAME,LAND_AREA,POPULATION,GROSS,CITY_DESCRIBE,DATA_YEAR,UPDATE_TIME)values<foreach collection="list" item="cityPO" open="" separator="," close="">(#{cityPO.cityId},#{cityPO.cityName},#{cityPO.landArea},#{cityPO.population},#{cityPO.gross},#{cityPO.cityDescribe},#{cityPO.dataYear},#{cityPO.updateTime})</foreach></insert>
</mapper>

3.批量更新

示例使用批量更新时，数据源请求URL需添加配置：allowMultiQueries=true。

3.1在CityBatchMapper中接口代码

@Repository
public interface CityBatchMapper {// 1.3批量更新int updateCity1_3(List<CityPO> cityList);// 2.3批量更新int updateCity2_3(List<Map<String, Object>> cityList);
}

3.2 在CityBatchMapper.xml中SQL代码

<?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.hub.example.mapper.CityBatchMapper"><!--1.3批量更新--><update id="updateCity1_3" parameterType="java.util.List">updatet_city_01set CITY_DESCRIBE='杭州是一个发达城市'WHERE CITY_ID IN<foreach collection="list" item="cityPO" open="(" separator="," close=")">#{cityPO.cityId}</foreach></update><!--2.3批量更新--><update id="updateCity2_3" parameterType="java.util.List"><foreach collection="list" item="cityPO" open="" separator=";" close="">updatet_city_01set CITY_DESCRIBE = #{cityPO.cityDescribe}where CITY_ID=#{cityPO.cityId}</foreach></update>
</mapper>

4.批量删除

4.1在CityBatchMapper中接口代码

@Repository
public interface CityBatchMapper {// 1.4批量删除int deleteCity1_4(List<CityPO> cityList);// 2.4批量删除int deleteCity2_4(List<Map<String, Object>> cityList);
}

4.2 在CityBatchMapper.xml中SQL代码

<?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.hub.example.mapper.CityBatchMapper"><!--1.4批量删除--><delete id="deleteCity1_4" parameterType="java.util.List">delete from t_city_01 where 1=1<if test="list.size()>0">AND CITY_ID IN<foreach collection="list" item="cityPO" open="(" separator="," close=")">#{cityPO.cityId}</foreach></if></delete><!--2.4批量删除--><delete id="deleteCity2_4" parameterType="java.util.List">delete from t_city_01 where 1=1<if test="list.size()>0">AND CITY_ID IN<foreach collection="list" item="cityPO" open="(" separator="," close=")">#{cityPO.cityId}</foreach></if></delete>
</mapper>

5.测试代码

5.1代码

@Slf4j
@RestController
@RequestMapping("/hub/example/cityBatch")
public class CityBatchController {@Autowiredprivate CityBatchMapper cityBatchMapper;@GetMapping("/load01")public Object load01() {log.info("测试开始...");List<Long> paraList =  Arrays.asList(1L,2L,3L);// 1.批量查询结果集: List<CityPO>List<CityPO> list01 = cityBatchMapper.queryCity1_1(paraList);// 2.批量插入参数集: List<CityPO>cityBatchMapper.insertCity1_2(list01);// 3.批量更新参数集: List<CityPO>cityBatchMapper.updateCity1_3(list01);// 4.批量删除: List<CityPO>
cityBatchMapper.deleteCity1_4(list01);
log.info("测试结束...");return "执行成功";}@GetMapping("/load02")public Object load02() {log.info("测试开始...");List<Long> paraList =  Arrays.asList(1L,2L);// 1.批量查询结果集: List<Map<String, Object>>List<Map<String, Object>> list02=cityBatchMapper.queryCity2_1(paraList);// 2.批量插入参数集: List<Map<String, Object>>cityBatchMapper.insertCity2_2(list02);AtomicInteger add= new AtomicInteger();list02.forEach((map -> {map.put("cityDescribe","杭州是一个互联网城市"+"_"+add.get());add.getAndIncrement();}));// 3.批量更新参数集: List<Map<String, Object>>cityBatchMapper.updateCity2_3(list02);// 4.批量删除: List<Map<String, Object>>cityBatchMapper.deleteCity2_4(list02);log.info("测试结束...");return "执行成功";}
}

5.2测试请求

URL01: http://127.0.0.1:18080/hub-example/hub/example/cityBatch/load01

URL02: http://127.0.0.1:18080/hub-example/hub/example/cityBatch/load02

6.基础支撑

6.1实体对象

@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class CityPO implements Serializable {private Long cityId;private String cityName;private Double landArea;private Long population;private Double gross;private String cityDescribe;private String dataYear;private Date updateTime;
}

6.2建表语句

CREATE TABLE t_city (CITY_ID BIGINT(16) NOT NULL COMMENT '唯一标识',CITY_NAME VARCHAR(64) COLLATE utf8_bin NOT NULL COMMENT '城市名',LAND_AREA DOUBLE DEFAULT NULL COMMENT '城市面积',POPULATION BIGINT(16) DEFAULT NULL COMMENT '城市人口',GROSS DOUBLE DEFAULT NULL COMMENT '生产总值',CITY_DESCRIBE VARCHAR(512) COLLATE utf8_bin DEFAULT NULL COMMENT '城市描述',DATA_YEAR VARCHAR(16) COLLATE utf8_bin DEFAULT NULL COMMENT '数据年份',UPDATE_TIME DATETIME DEFAULT NULL COMMENT '更新时间'
) ENGINE=INNODB DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='城市信息表';

6.3引入MyBatis依赖

使用mybatis-spring-boot-starter方式引入mybatis，对应mybatis-3.5.9和mybatis-spring-2.0.7核心依赖。

<dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId><version>2.2.2</version>
</dependency>

6.4application.yml配置

spring:datasource:url: jdbc:mysql://127.0.0.1:3306/hub_a_db?allowMultiQueries=trueusername: hub_apassword: 123456driver-class-name: com.mysql.cj.jdbc.Driverjackson:time-zone: GMT+8
mybatis:mapper-locations: classpath*:mapper/*.xmlconfiguration:log-impl: org.apache.ibatis.logging.stdout.StdOutImpl

以上，感谢。

2023年4月17日