mybatis批量更新、修改，以及異常，新增。較優

springboot2.1.1

批量修改

<update id="updateBatch" parameterType="com.yst.user.entity.User">
		<foreach collection="list" item="item" index="index"
			separator=";" close=";">
			UPDATE T_USER
			<set>
				<if test="item.membershipId != null">MEMBERSHIP_ID = #{item.membershipId},</if>
				<if test="item.membershipType != null">MEMBERSHIP_TYPE = #{item.membershipType},</if>
				<if test="item.updateDate != null">UPDATE_DATE = #{item.updateDate}</if>
			</set>
			WHERE USER_ID = #{item.userId}
		</foreach>
	</update>

如果出現異常：BadSqlGrammarException

是沒有設置數據庫的配置&allowMultiQueries=true

spring.datasource.url=jdbc:mysql://localhost:3306/user?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf8&useSSL=false&autoReconnect=true&allowMultiQueries=true

另外還有一種方式，是不能修改配置的情況下才使用，附上原文鏈接：https://blog.csdn.net/soda_lw/article/details/88849259

批量添加：

<insert id="largeSave">
		INSERT INTO bus_project_maintenance_detail(
			id,
			create_by,
			create_date,
			update_by,
			update_date,
			remarks,
			del_flag,
			projectname,
			year,
			username,
			userid,
			coercion_type,
			compulsory_own_funds,
			compulsory_company_borrowing,
			compulsory_mammon_loan,
			isforceorright,
			people_type,
			mainid
		) VALUES
		 	<foreach collection="list" item="busProjectMaintenanceDetail" separator=",">
		 (
				#{busProjectMaintenanceDetail.id},
				#{busProjectMaintenanceDetail.createBy.id},
				#{busProjectMaintenanceDetail.createDate},
				#{busProjectMaintenanceDetail.updateBy.id},
				#{busProjectMaintenanceDetail.updateDate},
				#{busProjectMaintenanceDetail.remarks},
				#{busProjectMaintenanceDetail.delFlag},
				#{busProjectMaintenanceDetail.projectname},
				#{busProjectMaintenanceDetail.year},
				#{busProjectMaintenanceDetail.username},
				#{busProjectMaintenanceDetail.userid},
				#{busProjectMaintenanceDetail.coercionType},
				#{busProjectMaintenanceDetail.compulsoryOwnFunds},
				#{busProjectMaintenanceDetail.compulsoryCompanyBorrowing},
				#{busProjectMaintenanceDetail.compulsoryMammonLoan},
				#{busProjectMaintenanceDetail.isforceorright},
				#{busProjectMaintenanceDetail.peopleType},
				#{busProjectMaintenanceDetail.mainid}
		)
			</foreach>
	</insert>