Hibernate 异常 集锦
2024-10-06 19:35:28
异常1.Error parsing JNDI name [foo]
异常信息摘要:
org.hibernate.engine.jndi.JndiException: Error parsing JNDI name [foo]
at org.hibernate.engine.jndi.internal.JndiServiceImpl.parseName(JndiServiceImpl.java:141)
异常信息说明:不能解析连接池foo
拷贝官方配置文件hibernate.cfg.xml的里面<session-factory name=”foo”>默认包含此foo属性配置,此异常不过是不影响运行的结果
解决思路:删除name=”foot”即可
异常2.org.hibernate.boot.registry.classloading.spi.ClassLoadingException: Unable to load class [com.mysql.jdbc.Driver]
异常信息摘要:
org.hibernate.boot.registry.classloading.spi.ClassLoadingException: Unable to load class [com.mysql.jdbc.Driver]
at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.classForName(ClassLoaderServiceImpl.java:243)
at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl.loadDriverIfPossible(DriverManagerConnectionProviderImpl.java:200)
异常信息说明:不能加载mysql驱动
解决思路:拷贝mysql驱动至classpath或者修改maven的pom.xml
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.40</version>
</dependency>
异常3.密码错误
异常信息摘要:
org.hibernate.exception.JDBCConnectionException: Error calling Driver#connect
Caused by: java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)
异常信息说明:不能获取连接
解决思路:修改mysql的密码至正确
密码写错或者connection.pasword少写一个s字母
<property name="connection.pasword">12345</property>
异常4.连接数据库url错误
异常信息摘要:
java.lang.UnsupportedOperationException: The application must supply JDBC connections
<property name="connection.urls">jdbc:mysql:///hibernate</property>
org.hibernate.HibernateException: Unable to make JDBC Connection [jdbc:mysql6:///hibernate]
<property name="connection.url">jdbc:mysql:///hibernate</property>
异常信息说明:url地址或者key写错
解决思路:修改url地址或者key
<property name="connection.url">jdbc:mysql:///hibernate</property>
异常5.未知实体类
异常信息摘要:
org.hibernate.MappingException: Unknown entity: com.jege.hibernate.single.table.User
at org.hibernate.internal.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:1096)
at org.hibernate.internal.SessionImpl.getEntityPersister(SessionImpl.java:1443)
异常信息说明:映射异常,hibernate配置文件没有加载映射文件
解决思路:在配置文件中通过mapping元素将映射文件加载进来
<mapping resource="com/jege/hibernate/single/table/User.hbm.xml" />
异常6.全类名写错
异常信息摘要:
org.hibernate.InvalidMappingException: Could not parse mapping document from resource com/jege/hibernate/single/table/User.hbm.xml
Caused by: org.hibernate.MappingException: class com.jege.hibernate.single.table.User.User not found while looking for property: id
Caused by: java.lang.ClassNotFoundException: com.jege.hibernate.single.table.User.User
<hibernate-mapping package="com.jege.hibernate.single.table.User">
<class name="User" table="t_user">
异常信息说明:映射文件全类名不正确
解决思路:修改全类名
属性package只写包路径,不要将类名也写进去
<hibernate-mapping package="com.jege.hibernate.single.table">
<class name="User" table="t_user">
异常7.属性名写错
异常信息摘要:
org.hibernate.InvalidMappingException: Could not parse mapping document from resource com/jege/hibernate/single/table/User.hbm.xml
Caused by: org.hibernate.PropertyNotFoundException: field [userUame] not found on com.jege.hibernate.single.table.User
<property name="userUame" column="name" />
异常信息说明:映射文件属性名不正确
解决思路:修改属性名
<property name="username" column="name" />
异常8.对象不存在
异常信息摘要:
org.hibernate.ObjectNotFoundException: No row with the given identifier exists: [com.jege.hibernate.single.table.User#5]
User user = (User)session.load(User.class, 5L);
System.out.println(user.getPassword());
异常信息说明:load方法没有找到对应的主键的实体
解决思路:使用get方法替换load,判断返回值是否null
User user = (User) session.get(User.class, 5L);
if (user != null) {
System.out.println(user.getPassword());
}
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