MyBatis Generator 返回自增ID

<table tableName="表名" domainObjectName="CollectInfo" >
     <generatedKey column="自增主建" sqlStatement="MySql" identity="true" />
</table>
<!--例-->
<table tableName="User" domainObjectName="CollectInfo" >
     <generatedKey column="user_id" sqlStatement="MySql" identity="true" />
</table>

//获取
User user = new User();
user.setName("测试");
// i 并非返回的userId 而是插入数据成功的条数
int i = userMapper.insertSelective(user)
if(i==1){
    Integer userId = user.getUserId();
}