欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  IT编程

ERROR: Field 'PostId' doesn't have a default value Exception in thread "main" org.hibernate.exception.GenericJDBCException: coul

程序员文章站 2022-06-27 14:08:26
例子: 在执行数据保持时提示session.save(p); 的错误。 INFO: HHH000232: Schema update complete Hibernate: insert into Post (postName) values (?) 八月 19, 2018 5:07:17 下午 o ......

 

  例子:    

post p = new post();
p.setpostid(3);
p.setpostname("技术");

 

在执行数据保持时提示session.save(p); 的错误。

ERROR: Field 'PostId' doesn't have a default value Exception in thread "main" org.hibernate.exception.GenericJDBCException: coul
info: hhh000232: schema update complete
hibernate: insert into post (postname) values (?)
八月 19, 2018 5:07:17 下午 org.hibernate.engine.jdbc.spi.sqlexceptionhelper logexceptions
warn: sql error: 1364, sqlstate: hy000
八月 19, 2018 5:07:17 下午 org.hibernate.engine.jdbc.spi.sqlexceptionhelper logexceptions
error: field 'postid' doesn't have a default value
exception in thread "main" org.hibernate.exception.genericjdbcexception: could not execute statement
    at org.hibernate.exception.internal.standardsqlexceptionconverter.convert(standardsqlexceptionconverter.java:54)
    at org.hibernate.engine.jdbc.spi.sqlexceptionhelper.convert(sqlexceptionhelper.java:126)
    at org.hibernate.engine.jdbc.spi.sqlexceptionhelper.convert(sqlexceptionhelper.java:112)
    at org.hibernate.engine.jdbc.internal.resultsetreturnimpl.executeupdate(resultsetreturnimpl.java:190)
    at org.hibernate.id.identitygenerator$getgeneratedkeysdelegate.executeandextract(identitygenerator.java:96)
    at org.hibernate.id.insert.abstractreturningdelegate.performinsert(abstractreturningdelegate.java:58)
    at org.hibernate.persister.entity.abstractentitypersister.insert(abstractentitypersister.java:3032)
    at org.hibernate.persister.entity.abstractentitypersister.insert(abstractentitypersister.java:3558)
    at org.hibernate.action.internal.entityidentityinsertaction.execute(entityidentityinsertaction.java:97)
    at org.hibernate.engine.spi.actionqueue.execute(actionqueue.java:488)
    at org.hibernate.engine.spi.actionqueue.addresolvedentityinsertaction(actionqueue.java:193)
    at org.hibernate.engine.spi.actionqueue.addinsertaction(actionqueue.java:177)
    at org.hibernate.engine.spi.actionqueue.addaction(actionqueue.java:212)
    at org.hibernate.event.internal.abstractsaveeventlistener.addinsertaction(abstractsaveeventlistener.java:324)
    at org.hibernate.event.internal.abstractsaveeventlistener.performsaveorreplicate(abstractsaveeventlistener.java:288)
    at org.hibernate.event.internal.abstractsaveeventlistener.performsave(abstractsaveeventlistener.java:194)
    at org.hibernate.event.internal.abstractsaveeventlistener.savewithgeneratedid(abstractsaveeventlistener.java:125)
    at org.hibernate.event.internal.defaultsaveorupdateeventlistener.savewithgeneratedorrequestedid(defaultsaveorupdateeventlistener.java:209)
    at org.hibernate.event.internal.defaultsaveeventlistener.savewithgeneratedorrequestedid(defaultsaveeventlistener.java:55)
    at org.hibernate.event.internal.defaultsaveorupdateeventlistener.entityistransient(defaultsaveorupdateeventlistener.java:194)
    at org.hibernate.event.internal.defaultsaveeventlistener.performsaveorupdate(defaultsaveeventlistener.java:49)
    at org.hibernate.event.internal.defaultsaveorupdateeventlistener.onsaveorupdate(defaultsaveorupdateeventlistener.java:90)
控制台出现的错误

 

 解决问题步骤:

  1. 查看post.hbm.xml 文件  
 <class name="hibernate.model.post" table="post">
        <id name="postid">
            <!-- 主键生成策略 -->
            <generator class="native"></generator>            
        </id>
        <property name="postname"/>

 

    2. <!-- 主键生成策略 -->

    <generator class="native"></generator>   
  

  3. 删掉。

  

  4. 重新运行。

 

 原因:

  post.hbm,xml配置文件里的<generator class="native"></generator>对主键已经默认赋值了,在post.java里在插入语句,造成冲突,所以出错。