Hibernate 5.1.1和5.2.2之间有什么变化?如果我使用5.2.2,我将收到一个错误消息“EntityManager命名为pu的持久性提供程序”.完全相同的配置适用于5.1.1.我应该如何更改代码以使5.2.2工作?
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>jpatest</groupId> <artifactId>jpatest</artifactId> <version>0.0.1-SNAPSHOT</version> <properties> <hibernate.version>5.2.2.Final</hibernate.version> </properties> <dependencies> <!-- https://mvnrepository.com/artifact/junit/junit --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency> <!-- https://mvnrepository.com/artifact/org.postgresql/postgresql --> <dependency> <groupId>org.postgresql</groupId> <artifactId>postgresql</artifactId> <version>9.4.1209.jre7</version> </dependency> <!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-core --> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-core</artifactId> <version>${hibernate.version}</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-entitymanager</artifactId> <version>${hibernate.version}</version> </dependency> </dependencies> </project>
src / main / resources / meta-inf中的persistence.xml
<?xml version="1.0" encoding="UTF-8" ?> <persistence xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd" version="2.0" xmlns="http://java.sun.com/xml/ns/persistence"> <persistence-unit name="pu" > <provider>org.hibernate.ejb.HibernatePersistence</provider> <properties> <property name="hibernate.archive.autodetection" value="class" /> <property name="hibernate.dialect" value="org.hibernate.dialect.PostgresqlDialect" /> <property name="hibernate.connection.driver_class" value="org.postgresql.Driver" /> <property name="hibernate.connection.url" value="jdbc:postgresql://localhost:5432/mydb" /> <property name="hibernate.default_schema" value="myschema" /> <property name="hibernate.connection.username" value="xxx" /> <property name="hibernate.connection.password" value="zzz" /> <!-- <property name="hibernate.show_sql" value="true"/> --> <property name="hibernate.flushMode" value="FLUSH_AUTO" /> <property name="hibernate.hbm2ddl.auto" value="validate" /> </properties> </persistence-unit> </persistence>
创建EntityManager
factory = Persistence.createEntityManagerFactory("pu"); em = factory.createEntityManager(); tx = em.getTransaction();
解决方法
hibernate-release-5.2.2.Final.zip包文件中不存在org.hibernate.ejb.HibernatePersistence类.这就是为什么无法找到提供程序的原因,因为类不能(在项目库jars).相反,我使用类org.hibernate.jpa.HibernatePersistenceProvider,可以在hibernate-core-5.2.2.Final.jar(它附带hibernate-release-5.2.2.Final.zip包)中找到,通过更改在persistence.xml中的提供者到< provider> org.hibernate.jpa.HibernatePersistenceProvider< / provider> ;.这样做,工作正常!希望问题只有这样.
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