Java hibernate在启动时抛出异常
Java hibernate在启动时抛出异常
提问于 2016-06-18 19:26:14
我现在正在使用Hibernate处理一个项目，但在运行我的项目时遇到错误。
在server.java (我的入口点)上，我得到了这个：
private static HibernateUtil hibernateUtil;在我的入口点：
hibernateUtil = new HibernateUtil();这是我的HibernateUtil类：
public class HibernateUtil {
private SessionFactory sessionFactory;
public HibernateUtil() {
StandardServiceRegistry registry = new StandardServiceRegistryBuilder().configure().build();
try {
sessionFactory = new MetadataSources( registry ).buildMetadata().buildSessionFactory();
}
catch (Exception e) {
StandardServiceRegistryBuilder.destroy( registry );
}
}
public SessionFactory getSessionFactory() {
return sessionFactory;
}
}现在我的Hibernate.cf.xml：
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">com.mysql.cj.jdbc.Driver</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">123</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/dynamicdb</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLInnoDBDialect</property>
<property name="show_sql">false</property>
<property name="connection.pool_size">1</property>
</session-factory>
现在我得到的错误是：
Jun 18, 2016 1:17:17 PM org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {5.2.0.Final}
Jun 18, 2016 1:17:17 PM org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
Jun 18, 2016 1:17:17 PM org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassist
Jun 18, 2016 1:17:18 PM org.hibernate.annotations.common.reflection.java.JavaReflectionManager <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {5.0.1.Final}
Jun 18, 2016 1:17:18 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
WARN: HHH10001002: Using Hibernate built-in connection pool (not for production use!)
Jun 18, 2016 1:17:18 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001005: using driver [com.mysql.cj.jdbc.Driver] at URL [jdbc:mysql://localhost:3306/dynamicdb]
Jun 18, 2016 1:17:18 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001001: Connection properties: {user=root, password=****}
Jun 18, 2016 1:17:18 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001003: Autocommit mode: false
Jun 18, 2016 1:17:18 PM org.hibernate.engine.jdbc.connections.internal.PooledConnections <init>
INFO: HHH000115: Hibernate connection pool size: 1 (min=1)
Jun 18, 2016 1:17:18 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl stop
INFO: HHH10001008: Cleaning up connection pool [jdbc:mysql://localhost:3306/dynamicdb]
Jun 18, 2016 1:17:18 PM org.hibernate.service.internal.AbstractServiceRegistryImpl stopService
INFO: HHH000369: Error stopping service [class org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl] : java.lang.NullPointerException我在MacOSX10.10和MAMP上运行Eclipse mars2。MySQL正在运行，数据库用户和数据库存在，并且密码正确。有什么问题吗？
回答 4
Stack Overflow用户
发布于 2017-01-06 16:58:20
我和你有同样的问题。似乎我们都从Hibernate官方代码示例中复制了代码。我认为这可能是mysql connecotrj 6.0的错误。在我向catch语句添加throw语句后：
final StandardServiceRegistry registry = new StandardServiceRegistryBuilder()
.configure()
.build();
try {
sessionFactory = new MetadataSources(registry).buildMetadata().buildSessionFactory();
} catch (Exception e) {
StandardServiceRegistryBuilder.destroy(registry);
throw new RuntimeException(e);
}我发现了原始异常：
Caused by: com.mysql.cj.core.exceptions.InvalidConnectionAttributeException: The server time zone value '�й���ʱ��' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time zone value if you want to utilize time zone support.mysql connectorj 5.1中没有出现这种情况
因此，有两种解决方案:将mysql jdbc驱动程序切换到5.1或向jdbc url字符串添加时区参数，如this。在hibernate.cfg.xml文件中，不要忘记将&更改为&；
Stack Overflow用户
发布于 2017-09-13 22:15:48
当我的映射文件包含一列两次时，我也遇到了同样的问题
<property column="STATE" name="state" type="java.lang.String" not-null="true"/>
<property column="BRANCH" name="branch" type="java.lang.String" not-null="true"/>
<property column="COUNTRY" name="country" type="java.lang.String" not-null="true"/>
<property column="STATE" name="state" type="java.lang.String" not-null="true"/>因此，一旦我将一个状态更改为适当的属性，例如
<property column="SITE" name="site" type="java.lang.String" not-null="true"/>问题已解决。所以要小心你的映射
Stack Overflow用户
发布于 2018-02-09 10:18:12
在我的例子中，我使用的是Netbeans，并且我的实体只使用Netbeans生成。
在摆弄了mysql和hibernate核心jar版本之后，在评论@NamedQueries之后，我修复了它。
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原文链接：
https://stackoverflow.com/questions/37896398
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