我遇到了Hibernate-JPA-Maven的一些问题
这是我第一次使用JPA和hibernate而且我遇到了一些问题:我有一个用JPA创建的数据库,我想用JUnit5对它进行一些CRUD测试 . 使用pom.xml我添加依赖项以使用SQLite方言和hibernate,并且我有一个persistence.xml文件 . 我使用Eclipse来运行项目,看看第一个简单的测试是否有效,我有这个问题:
oct . 28,2017 2:42:32 PM org.hibernate.jpa.internal.util.LogHelper logPersistenceUnitInformation INFO:HHH000204:处理PersistenceUnitInfo [name:Bla ...] oct . 28,2017 2:42:32 PM org.hibernate.Version logVersion INFO:HHH000412:Hibernate Core {5.2.12.Final} oct . 28,2017 2:42:32 PM org.hibernate.cfg.Environment INFO:HHH000206:hibernate.properties not found oct . 28,2017 2:42:32 PM org.hibernate.annotations.common.reflection.java.JavaReflectionManager INFO:HCANN000001:Hibernate Commons Annotations {5.0.1.Final} oct . 28,2017 2:42:33 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl配置WARN:HHH10001002:使用Hibernate内置连接池(不用于 生产环境 用途!)oct . 28,2017 2:42:33 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator INFO:HHH10001005:在URL [jdbc:sqlite :: memory:] oct使用驱动程序[org.sqlite.JDBC] . 28,2017 2:42:33 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator INFO:HHH10001001:连接属性:{charSet = UTF-8,password = ****,user = test} oct . 28,2017 2:42:33 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator INFO:HHH10001003:Autocommit mode:false oct . 28,2017 2:42:33 PM org.hibernate.engine.jdbc.connections.internal.PooledConnections INFO:HHH000115:Hibernate连接池大小:20(min = 1)oct . 28,2017 2:42:33 PM org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator initiateService WARN:HHH000342:无法获取与查询元数据的连接:无法确定要使用的Dialect [name = SQLite,majorVersion = 3] ;用户必须注册解析器或在线程“main”org.hibernate.service.spi.ServiceException中显式设置'hibernate.dialect'异常:无法创建请求的服务[org.hibernate.engine.jdbc.env.spi.JdbcEnvironment] at . . . 引起:org.hibernate.HibernateException:当'hibernate.dialect'没有设置时,对DialectResolutionInfo的访问不能为null . . . ......还有14个
所以我试着找出原因:
警告:HHH000342:无法获取与查询元数据的连接:无法确定要使用的Dialect [name = SQLite,majorVersion = 3];用户必须注册解析器或明确设置'hibernate.dialect'
显然这是因为SQLite 3和Hibernate 5不兼容,所以我试试这个:Does Hibernate Fully Support SQLite但它不适合我 .
然后我尝试采用较低版本的hibernate并在我的pom.xml中修改hibernate版本和hibernate-core版本到4.3.11.Final但同样,它并没有解决我的问题 .
经过几个小时后,如果问题来自hibernate和SQLite的版本,或者这是我的pom.xml中的配置问题(缺少依赖项?),或者这是我的持久性,我无法弄明白 . xml,或者这来自我的类Test .
如果您需要更多详细信息,请与我们联系 . 预先感谢您的帮助 .
我的pom.xml文件:
<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>fr.umlv.orthopro</groupId>
<artifactId>OrthoPro_brain</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>OrthoPro_brain</name>
<url>http://maven.apache.org</url>
<properties>
<java.version>9</java.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<junit.jupiter.version>5.0.1</junit.jupiter.version>
<junit.platform.version>1.0.1</junit.platform.version>
<hibernate.version>5.2.12.Final</hibernate.version>
<sqlite.version>3.20.1</sqlite.version>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
<showWarnings>true</showWarnings>
<showDeprecation>true</showDeprecation>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-javadoc-plugin</artifactId>
<version>3.0.0-M1</version>
<configuration>
<reportOutputDirectory>${project.build.directory}/javadoc</reportOutputDirectory>
<destDir>javadoc</destDir>
<nohelp>true</nohelp>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-engine</artifactId>
<version>${junit.jupiter.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.platform</groupId>
<artifactId>junit-platform-runner</artifactId>
<version>${junit.platform.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>${hibernate.version}</version>
</dependency>
<dependency>
<groupId>org.xerial</groupId>
<artifactId>sqlite-jdbc</artifactId>
<version>${sqlite.version}</version>
<!-- <scope>test</scope> -->
</dependency>
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.1-api</artifactId>
<version>1.0.0.Final</version>
</dependency>
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>org.eclipse.persistence.jpa</artifactId>
<version>2.7.0</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.2.12.Final</version>
</dependency>
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.3.0</version>
</dependency>
</dependencies>
</project>
我的persistence.xml文件:
<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence
http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd"
version="2.1">
<persistence-unit name="first_test" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<class>fr.umlv.orthpro.db.User</class>
<class>fr.umlv.orthpro.db.Rule</class>
<class>fr.umlv.orthpro.db.UserRule</class>
<class>fr.umlv.orthpro.db.Sentence</class>
<properties>
<property name="dialect" value="org.hibernate.dialect.SQLiteDialect" />
<property name="javax.persistence.jdbc.driver" value="org.sqlite.JDBC" />
<property name="javax.persistence.jdbc.url" value="jdbc:sqlite::memory:" />
<property name="javax.persistence.jdbc.user" value="test" />
<property name="javax.persistence.jdbc.password" value="test" />
<property name="hibernate.show_sql" value="true" />
<property name="format_sql" value="true" />
<property name="hibernate.connection.charSet" value="UTF-8" />
<property name="hibernate.hbm2ddl.auto" value="create" />
</properties>
</persistence-unit>
</persistence>
这是我在数据库上运行测试的类:
package fr.umlv.orthopro.db;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
public class Test {
EntityManagerFactory emfactory = Persistence.createEntityManagerFactory( "first_test" );
EntityManager entitymanager = emfactory.createEntityManager( );
entitymanager.getTransaction( ).begin( );
User quentin = new User( );
quentin.setId(1201);
quentin.setAdmin(false);
entitymanager.persist( quentin );
entitymanager.getTransaction( ).commit( );
entitymanager.close( );
emfactory.close( );
}
}
编辑:我改变了<property name="dialect" value="org.hibernate.dialect.SQLiteDialect" />
来<property name="hibernate.dialect" value="org.hibernate.dialect.SQLiteDialect" />
现在我有了这个:
无法将名称[org.hibernate.dialect.SQLiteDialect]解析为策略[org.hibernate.dialect.Dialect]
1 回答
我使用SQLite 3.10和Hibernate 5.2,配置如下:
pom.xml中:
persistence.xml中:
当然,您必须根据需要更改
hibernate.connection.url
和hibernate.hbm2ddl.auto
以及其他属性的值 .