MyBatis+Oracle实现主键自增长的几种常用方式

<insert id="addLoginLog" parameterType="map" >
          <selectKey  keyProperty="id" resultType="int" order="BEFORE">
              select nvl(max(id),0)+1 from ap_loginlog
          </selectKey>
          insert into ap_loginlog(ID,MEMBER_ID) values(#{id},#{memberId})
  </insert>

CREATE SEQUENCE loginlog_squence   
INCREMENT BY 1  
NOMAXVALUE  
NOCYCLE  
CACHE 10;  

<insert id="addLoginLog" parameterType="map" >
      insert into ap_loginlog(ID,MEMBER_ID) values(loginlog_squence.nextval,#{memberId})
</insert>

create or replace trigger loginlog_trigger  
  before insert on ap_loginlog    
  for each row  
begin  
  select loginlog_sequence.nextval into :new.id from dual;  
end loginlog_trigger;  

<insert id="addLoginLog" parameterType="map" >
      insert into ap_loginlog(MEMBER_ID) values(#{memberId})
  </insert>