JAVA高级面试进阶训练营视频教程

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Hibernate: insert into test1.WarnWeather (WAREA, wdate, WDAYS, WINFO, WTYPE, WNO) values (?, ?, ?, ?, ?, ?)
Hibernate: select weathers0_.WNO as WNO1_0_, weathers0_.WAREA as WAREA2_0_, weathers0_.wdate as wdate3_0_, weathers0_.WDAYS as WDAYS4_0_, weathers0_.WINFO as WINFO5_0_, weathers0_.WTYPE as WTYPE6_0_ from test1.WarnWeather weathers0_
Hibernate: insert into test1.WarnWeather (WAREA, wdate, WDAYS, WINFO, WTYPE, WNO) values (?, ?, ?, ?, ?, ?)
ERROR SqlExceptionHelper ORA-00001: 违反唯一约束条件 (TEST1.SYS_C0011549)

ERROR ExceptionMapperStandardImpl HHH000346: Error during managed flush [org.hibernate.exception.ConstraintViolationException: could not execute statement]

 

异常问题：

客户端只能插入一条数据，当插入第二条数据时出现异常 ERROR SqlExceptionHelper ORA-00001: 违反唯一约束条件 (TEST1.SYS_C0011549)

 

原因：在实体类中没有配置Oracle的id主键导致Oracle主键的冲突

 

解决方案：在实体类中添加注解的序列

//@GeneratedValue中generator里面的值对应@SequenceGenerator中name里面的值（可以随便定义但一定要相同），
//sequenceName是创建的sequence名字（对应数据库中创建的序列名），allocationSize表示序列自增长的大小为1
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator="seq")
@SequenceGenerator(name="seq", sequenceName="SEQ_WEATHER",allocationSize = 1)