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实体表
刚开始在Java代码层面批量插入
for (int i = 1; i <1000000 ; i++) { Orders orders=new Orders(); orders.
setAmount(i); orders.setPid(i); orders.setSno(i); ordersService.save(orders); }
结果插入特别的慢，可惜没统计时间，大概几分钟了还在5万条左右。
我估计是我这么操作，每次都要创建连接，连接关闭，交给mysql一条条执行导致大量的数据库连接以及IO操作，太慢了。
然后我想着把它放到一个集合里面，调用批处理。
List<Orders> list=new ArrayList<>(1000000); for (int i = 1; i <1000000 ; i++) {
Orders orders=new Orders(); orders.setAmount(i); orders.setPid(i); orders.setSno
(i); list.add(orders); } ordersService.saveBatch(list);
结果感觉比之前快了几倍，但还是慢。
改进用存储过程
drop PROCEDURE if exists test_insert; delimiter // CREATE PROCEDURE test_insert
(n int) begin declare v int default 1; SET AUTOCOMMIT=0; while v < n do insert
into orders values(v,v,v,v); set v = v + 1; end while; SET AUTOCOMMIT=1; end //
调用
30秒左右百万数据就插入了
还有一个想法就是直接循环拼接到一条sql里面，然后insert执行。这样就只有一次连接。
