1.建立sequence
create sequence seq_test
minvalue 10
maxvalue 999999
start with 20000
increment by 1
查询 select seq_test.nextval from dual;
2 写入配置文件**.hbm.xml
<id name="id' type='"java.lang.Long">
<column name="ID" >
<genrator class="sequence">
<param name="sequence">seq_test(序列名)</param>
</genrator>
</id>