hibernate执行保存对象时出现异常:org.hibernate.exception.GenericJDBCException

hibernate执行保存对象时出现异常:
org.hibernate.exception.GenericJDBCException: could not insert: [com.hibernate.domain.User] Caused by: java.sql.SQLException: Field 'user_id' doesn't have a default value

具体的代码和配置如下:
hibernate.cfg.xml:


<!-- Database connection settings -->
com.mysql.jdbc.Driver
jdbc:mysql://localhost:3306/hibernate3
root
ytkj

    <!-- JDBC connection pool (use the built-in) -->
    <property name="connection.pool_size">1</property>

    <!-- SQL dialect -->
    <property name="dialect">org.hibernate.dialect.MySQLDialect</property>

    <!-- Enable Hibernate's automatic session context management -->
    <!-- <property name="current_session_context_class">thread</property>  -->

    <!-- Disable the second-level cache  -->
    <!-- <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>  -->

    <!-- Echo all executed SQL to stdout -->
    <!-- show sql dml -->
    <property name="show_sql">true</property>

    <!-- Drop and re-create the database schema on startup -->
    <!-- <property name="hbm2ddl.auto">update</property>  -->

    <mapping resource="com/hibernate/domain/User.hbm.xml"/>

</session-factory>

建表语句(成功):
CREATE TABLE t_user (
user_id int(11) NOT NULL,
user_name varchar(20) default NULL,
user_age int(11) default NULL,
PRIMARY KEY (user_id)

) ENGINE=InnoDB DEFAULT CHARSET=utf8

测试类:
package com.hibernate.manager;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;

import com.hibernate.domain.User;
import com.hibernate.util.HibernateUtil;

public class UserManager {
public static void main(String[] args) {
SessionFactory sessionFactory = HibernateUtil.getSessionFactory();
Session session = sessionFactory.openSession();
Transaction ts = session.beginTransaction();

    User user = new User();
    user.setId(1);
    user.setName("zhangsan");
    user.setAge(21);
    session.save(user);
    ts.commit();

    session.close();
    sessionFactory.close();
}

}

User.hbm.xml:





<!-- -->


以上代码执行过后,就包上面的异常。
如果不使用id生成策略(及时没有generator标签),则可以insert成功。
请问这问题是出在哪里?高手指点。

2个回答

使用hibernate时不应该是自动创建表吗,请问怎么在建表的时候指定为auto_increment的啊
我在配置文件中使用的是 使用的也是native

我知道了,是我的建表语句有问题应该是:
CREATE TABLE t_user (
user_id int(11) NOT NULL auto_increment,
user_name varchar(20) default NULL,
user_age int(11) default NULL,
PRIMARY KEY (user_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8

我少了auto_increment,但是在mysql情况下,少了是会出错的。
因为,这时候的id的生成策略native, id是自动生成的,只要在建表的时候指定为auto_increment即可。

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at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5213) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:752) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:728) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734) at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1702) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:564) at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300) at java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:809) at java.management/com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:482) at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:431) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:564) at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300) at java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:809) at java.management/com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) at java.management.rmi/javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1466) at java.management.rmi/javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:75) at java.management.rmi/javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1307) at java.management.rmi/javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1399) at java.management.rmi/javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:827) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:564) at java.rmi/sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:359) at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:200) at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:197) at java.base/java.security.AccessController.doPrivileged(Native Method) at java.rmi/sun.rmi.transport.Transport.serviceCall(Transport.java:196) at java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:567) at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:800) at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:682) at java.base/java.security.AccessController.doPrivileged(Native Method) at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:681) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) at java.base/java.lang.Thread.run(Thread.java:844) Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: com/fasterxml/jackson/databind/exc/InvalidDefinitionException at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:175) at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:88) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1223) ... 65 more Caused by: java.lang.NoClassDefFoundError: com/fasterxml/jackson/databind/exc/InvalidDefinitionException at org.springframework.http.converter.support.AllEncompassingFormHttpMessageConverter.<init>(AllEncompassingFormHttpMessageConverter.java:67) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.<init>(RequestMappingHandlerAdapter.java:190) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:488) at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:163) ... 67 more Caused by: java.lang.ClassNotFoundException: com.fasterxml.jackson.databind.exc.InvalidDefinitionException at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1275) at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1109) ... 74 more

Exception in thread "main" java.lang.NoClassDefFoundError如何解决

本人初学Hibernate框架,网络上找的视频自学的,刚刚到第一次运行文件就出现这个错误,用的是eclipse,错误代码如下: ``` Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/JAXBException at org.hibernate.boot.spi.XmlMappingBinderAccess.<init>(XmlMappingBinderAccess.java:43) at org.hibernate.boot.MetadataSources.<init>(MetadataSources.java:87) at org.hibernate.cfg.Configuration.<init>(Configuration.java:123) at org.hibernate.cfg.Configuration.<init>(Configuration.java:118) at cn.ljs.text.HibernateTest.main(HibernateTest.java:13) Caused by: java.lang.ClassNotFoundException: javax.xml.bind.JAXBException at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(Unknown Source) at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(Unknown Source) at java.base/java.lang.ClassLoader.loadClass(Unknown Source) ... 5 more ``` 文件代码如下: ``` package cn.ljs.text; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.boot.registry.StandardServiceRegistryBuilder; import org.hibernate.cfg.Configuration; import org.hibernate.service.ServiceRegistry; import cn.ljs.pojo.User; public class HibernateTest { public static void main(String[] args) { Configuration cfg=new Configuration().configure(); ServiceRegistry registry=new StandardServiceRegistryBuilder().applySettings(cfg.getProperties()).build(); SessionFactory factory=cfg.buildSessionFactory(registry); Session session=factory.openSession(); User user=(User) session.get(User.class, 1); System.out.println(user); session.close(); factory.close(); } } ``` 很简单,就是测试一下布置有没有问题 以下是包图: ![图片说明](https://img-ask.csdn.net/upload/201902/15/1550193069_565517.jpg) 跟着教学视频走的,代码无误,视频里直接输出了数据库表中的信息,而我就报错... 已自行百度后作出以下修改: ------------------------- 1.将jar包修改到classpath目录下, ![图片说明](https://img-ask.csdn.net/upload/201902/15/1550193227_189559.jpg) 无效 2.修改classpath等配置, ![图片说明](https://img-ask.csdn.net/upload/201902/15/1550193280_600490.jpg) ![图片说明](https://img-ask.csdn.net/upload/201902/15/1550193296_623025.jpg) path:D:\OracleWINDOWS.X64_180000_db_home\bin;%JAVA_HOME%\bin;%MAVEN_HOME%\bin;C:\Program Files (x86)\Common Files\Oracle\Java\javapath;D:\java\bin;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\system32\wbem 我半路出家,在外面培训班学过4个月java基础,学的是SSM框架,现在想自己拓展一下学习Hibernate,哪知道一开始就遇到这问题 o(╥﹏╥)o,请高手指点!谢谢!

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import java.sql.SQLException; import org.apache.commons.dbcp.BasicDataSource; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.Transaction; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class Test { public static void main(String[] args) throws SQLException { ApplicationContext ap=new ClassPathXmlApplicationContext("applicationContext.xml"); // BasicDataSource dataSource=(BasicDataSource) ap.getBean("dataSource"); // Connection con=(Connection) dataSource.getConnection(); // System.out.println(con); SessionFactory sf=(SessionFactory) ap.getBean("sessionFactory"); Session session = sf.openSession(); Transaction trans=session.beginTransaction(); trans.begin(); session.createSQLQuery("create table users").executeUpdate(); trans.commit(); } } 这是我Test类,主要是通过ApplicationContext ap得到dataSource或者sessionFactory实例来测试数据库是否连接正常,但是却爆出无法create bean异常: Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in class path resource [applicationContext.xml]: Invocation of init method failed; nested exception is org.hibernate.HibernateException: Error applying BeanValidation relational constraints at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1455) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:567) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464) at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139) at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83) at com.idealworkshop.test.Test.main(Test.java:20) Caused by: org.hibernate.HibernateException: Error applying BeanValidation relational constraints at org.hibernate.cfg.beanvalidation.BeanValidationIntegrator.applyRelationalConstraints(BeanValidationIntegrator.java:219) at org.hibernate.cfg.beanvalidation.BeanValidationIntegrator.integrate(BeanValidationIntegrator.java:126) at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:306) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1744) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1782) at org.springframework.orm.hibernate4.LocalSessionFactoryBuilder.buildSessionFactory(LocalSessionFactoryBuilder.java:189) at org.springframework.orm.hibernate4.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:350) at org.springframework.orm.hibernate4.LocalSessionFactoryBean.afterPropertiesSet(LocalSessionFactoryBean.java:335) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1514) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1452) ... 12 more

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spring声明式事务中tx:method标签中的name属性不生效

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为什么程序员做外包会被瞧不起?

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当HR压你价,说你只值7K,你该怎么回答?

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编程语言层出不穷,从最初的机器语言到如今2500种以上的高级语言,程序员们大呼“学到头秃”。程序员一边面临编程语言不断推陈出新,一边面临由于许多代码已存在,程序员编写新应用程序时存在重复“搬砖”的现象。 无代码/低代码编程应运而生。无代码/低代码是一种创建应用的方法,它可以让开发者使用最少的编码知识来快速开发应用程序。开发者通过图形界面中,可视化建模来组装和配置应用程序。这样一来,开发者直...

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大三实习生,字节跳动面经分享,已拿Offer

说实话,自己的算法,我一个不会,太难了吧

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前几天我们公司做了一件蠢事,非常非常愚蠢的事情。我原以为从学校出来之后,除了找工作有测试外,不会有任何与考试有关的事儿。 但是,天有不测风云,公司技术总监、人事总监两位大佬突然降临到我们事业线,叫上我老大,给我们组织了一场别开生面的“考试”。 那是一个风和日丽的下午,我翘着二郎腿,左手端着一杯卡布奇诺,右手抓着我的罗技鼠标,滚动着轮轴,穿梭在头条热点之间。 “淡黄的长裙~蓬松的头发...

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导读 前天面试了一个985高校的实习生,问了他平时用什么开发工具,他想也没想的说IDEA,于是我抛砖引玉的问了一下IDEA的调试用过吧,你说说怎么设置断点...

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来看几个问题想不想月薪超过5万?想不想进入公司架构组?想不想成为项目组的负责人?想不想成为spring的高手,超越99%的对手?那么本文内容是你必须要掌握的。本文主要详解bean的生命...

自从喜欢上了B站这12个UP主,我越来越觉得自己是个废柴了!

不怕告诉你,我自从喜欢上了这12个UP主,哔哩哔哩成为了我手机上最耗电的软件,几乎每天都会看,可是吧,看的越多,我就越觉得自己是个废柴,唉,老天不公啊,不信你看看…… 间接性踌躇满志,持续性混吃等死,都是因为你们……但是,自己的学习力在慢慢变强,这是不容忽视的,推荐给你们! 都说B站是个宝,可是有人不会挖啊,没事,今天咱挖好的送你一箩筐,首先啊,我在B站上最喜欢看这个家伙的视频了,为啥 ,咱撇...

代码注释如此沙雕,会玩还是你们程序员!

某站后端代码被“开源”,同时刷遍全网的,还有代码里的那些神注释。 我们这才知道,原来程序员个个都是段子手;这么多年来,我们也走过了他们的无数套路… 首先,产品经理,是永远永远吐槽不完的!网友的评论也非常扎心,说看这些代码就像在阅读程序员的日记,每一页都写满了对产品经理的恨。 然后,也要发出直击灵魂的质问:你是尊贵的付费大会员吗? 这不禁让人想起之前某音乐app的穷逼Vip,果然,穷逼在哪里都是...

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之前有很多读者咨询我:武哥,在拼多多上班是一种什么样的体验?由于一直很忙,没抽出时间来和大家分享。上周末特地花点时间来写了一篇文章,跟大家分享一下拼多多的日常。 1. 倒时差的作息 可能很多小伙伴都听说了,拼多多加班很严重。这怎么说呢?作息上确实和其他公司有点区别,大家知道 996,那么自然也就能理解拼多多的“11 11 6”了。 所以当很多小伙伴早上出门时,他们是这样的: 我们是这样的: 当...

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又一次被面试官带到坑里面了。面试官:springmvc用过么?我:用过啊,经常用呢面试官:springmvc中为什么需要用父子容器?我:嗯。。。没听明白你说的什么。面试官:就是contr...

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