Java_12 批量插入数据、mapper分页模糊查
目录
- 批量插入数据
- mapper分页模糊查
批量插入数据
// 批量插入
if (!voteOwner1.isEmpty()) {
List voteOwners2 = new ArrayList<>();
//vo1为待插入数据
for (int i = 0; i < voteOwner1.size(); i++) {
//把vo1的数据加进新的列表vo2,若vo2的大小>=200或者vo1为最后一条数据,执行插入操作
voteOwners2.add(voteOwner1.get(i));
if (voteOwners2.size() >= 200 || i == voteOwner1.size() - 1) {
Map m = new HashMap<>();
m.put("list", voteOwners2);
try {
//每200条数据添加一次,添加完清空vo2
this.voteOwnerService.addList(m);
voteOwners2.clear();
} catch (Exception e) {
return ResultMap.error(e.getMessage());
}
}
}
}
//allowMultiQueries=true代表可以批量更新
spring.db2.datasource.url=jdbc:mysql://url/cs?useUnicode=true&characterEncoding=utf8&useSSL=false&zeroDateTimeBehavior=convertToNull&autoReconnect=true&failOverReadOnly=false&allowMultiQueries=true
mapper分页模糊查