我正在使用maven,hibernate和mysql进行项目。这是我的pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.heroku.realstate</groupId>
<artifactId>realstate-database</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.38</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.1.0.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.1.0.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>ejb3-persistence</artifactId>
<version>1.0.2.GA</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-tools</artifactId>
<version>4.3.2.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-annotations</artifactId>
<version>3.5.6-Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-commons-annotations</artifactId>
<version>3.2.0.Final</version>
</dependency>
</dependencies>
</project>
这是我的资源/ hibernate.cfg.xml:
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">
com.mysql.jdbc.Driver
</property>
<property name="hibernate.connection.url">
jdbc:mysql://localhost:3306/$DATABASE_NAME
</property>
<property name="hibernate.connection.password">
$PASSWORD
</property>
<property name="hibernate.connection.username">
@USERNAME
</property>
<property name="hibernate.dialect">
org.hibernate.dialect.MySQLDialect
</property>
<property name="show_sql">
true
</property>
<property name="hbm2ddl.auto">
create
</property>
<mapping class="com.heroku.realstate.database.user.UserEntity"/>
<mapping class="com.heroku.realstate.database.user.ClientEntity"/>
<mapping class="com.heroku.realstate.database.user.BotEntity"/>
<mapping class="com.heroku.realstate.database.sms.SmsEntity"/>
</session-factory>
</hibernate-configuration>
我已经安装了mysql并创建了一个名为$ DATABASE_NAME的数据库,但是我没有在数据库中创建任何表(因为我不是sql方面的专家,我希望休眠可以为像我这样的人做!)。这就是我使用休眠方式:
class HibernateUtils {
private static final SessionFactory sessionFactory = buildSessionFactory();
private static SessionFactory buildSessionFactory() {
// Create the SessionFactory from hibernate.cfg.xml
return new AnnotationConfiguration().configure(new File("hibernate.cfg.xml")).buildSessionFactory();
}
static SessionFactory getSessionFactory() {
return sessionFactory;
}
static void shutdown() {
// Close caches and connection pools
getSessionFactory().close();
}
我通过maven构建了这个项目,并且构建成功。但是,当我运行应用程序JVM时,出现以下错误:java.lang.NoClassDefFoundError:org / hibernate / cfg / Mappings在此行:
return new AnnotationConfiguration().configure(new File("hibernate.cgf.xml")).buildSessionFactory();
问题是什么?我该如何解决?谢谢!
库的问题。您使用的是Hibernate5。因此,您不需要pom.xml
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>ejb3-persistence</artifactId>
<version>1.0.2.GA</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-annotations</artifactId>
<version>3.5.6-Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-commons-annotations</artifactId>
<version>3.2.0.Final</version>
</dependency>
Hibernate 5可以使用hibernate-commons-annotations-5.0.1.Final.jar
,您无需指定它。因此,它是一个传递依赖。
您也不需要它,因为您不使用 JPA
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.1.0.Final</version>
</dependency>
AnnotationConfiguration
Hibernate 4和Hibernate 5中没有。它是Hibernate 3的形式!不知道从哪里得到的。
配置Hibernate 5
private static SessionFactory buildSessionFactory() {
return new Configuration().configure().buildSessionFactory();
}
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