mybatis3 batch update batch insert

In the development of the company's ERP project, when encountering batch data insertion or update, it is time-consuming to connect to the database each time, so it is decided to change to batch operation to improve efficiency. When importing inventory, a large amount of data is required for batch operations.

1: Batch operations must be enabled in the database connection code. Add this sentence, &allowMultiQueries=true , the complete is as follows:

jdbc:mysql://localhost:3306/jeesite2016?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true

 

2: Batch update, note that the separator of update is ;, which is different from batch insert.

<update id="batchUpdateQuantity" parameterType="java.util.List">
                  <foreach collection="list" item="item" index="index"  open="" close="" separator=";">
                  update erp_store
                  <set>
                  quantity=#{item.quantity},
                  update_date=#{item.updateDate}
                  </set>
                  where id = #{item.id}
                 </foreach>
	</update>
	

After testing, there are a total of 1662 pieces of data, the batch insertion takes 466ms, and the loop insert takes 1898ms. It is much more efficient to operate in batches.

 

3. Batch insert  

<insert id="batchInsert">
		INSERT INTO erp_store_detail(
			id,
			store_id,
			type,
			change_quantity,
			after_quantity,
			update_date,
			remarks,
			link_id
		) VALUES
	 <foreach collection="list" item="item" index="index" separator="," >  
        (
			#{item.id},
			#{item.store.id},
			#{item.type},
			#{item.changeQuantity},
			#{item.afterQuantity},
			#{item.updateDate},
			#{item.remarks},
			# {item.linkId}
		)
	 </foreach>  
    
	</insert>