我想通過遵循Hibernate EntityManager documentation中的信息來設置一個簡單的jpa 2.0項目。我一直在這幾個小時了,但不管我做什麼,當我嘗試創建一個EntityManagerFactory的我總是得到這樣的例外:使用Hibernate作爲提供者的JPA 2.0 - 例外:沒有EntityManager的持久性提供者
Exception in thread "main" javax.persistence.PersistenceException: No Persistence provider for EntityManager named manager1
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:32)
at se.mycomp.UserTest.main(UserTest.java:9)
我發現相當對此例外幾個類似的問題,但沒有解決方案,我能夠去工作。我在這裏做錯了什麼?
目錄結構
.
├── pom.xml
└── src
├── main
│ ├── java
│ │ └── se
│ │ └── mycomp
│ │ ├── UserTest.java
│ │ └── domain
│ │ └── User.java
│ └── resources
│ ├── META-INF
│ │ └── persistence.xml
│ └── log4j.properties
└── test
└── java
我的persistence.xml
<persistence xmlns="http://java.sun.com/xml/ns/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">
<persistence-unit name="manager1" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>se.mycomp.domain.User</class>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect"/>
<property name="hibernate.hbm2ddl.auto" value="create-drop"/>
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost/test"/>
<property name="javax.persistence.jdbc.user" value="test"/>
<property name="javax.persistence.jdbc.password" value="1234"/>
</properties>
</persistence-unit>
</persistence>
我的pom.xml
<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>se.lil.tryjpa</groupId>
<artifactId>try-jpa</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<hibernate-core.version>3.6.4.Final</hibernate-core.version>
<mysql-connector-java.version>5.1.16</mysql-connector-java.version>
<slf4j.version>1.6.1</slf4j.version>
<log4j.version>1.6.1</log4j.version>
</properties>
<dependencies>
<!-- HIBERNATE DEPENDENCIES -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>${hibernate-core.version}</version>
</dependency>
<!-- MYSQL DEPENDENCIES -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql-connector-java.version}</version>
</dependency>
<!-- Logging Dependencies -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${log4j.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
<optimize>true</optimize>
<debug>true</debug>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-eclipse-plugin</artifactId>
<version>2.8</version>
<configuration>
<downloadSources>true</downloadSources>
</configuration>
</plugin>
</plugins>
</build>
UserTest.java
public class UserTest {
public static void main(String[] args) {
EntityManagerFactory emf = Persistence.createEntityManagerFactory("manager1");
EntityManager em = emf.createEntityManager();
}
}
根本沒有令人尷尬,該錯誤信息是單獨無用的(適用於大量的問題)。 –
我想補充一點,這個依賴關係應該替代'hibernate-core',而不僅僅是一起添加,因爲它實際上已經包含了'hibernate-core'。查看Hibernate [下載頁面]上的Maven依賴關係列表(http://hibernate.org/orm/downloads/)。他們明確地說'對於JPA,使用hibernate-entitymanager而不是hibernate-core'。 – jFrenetic
我沒有使用maven,所以通過添加hibernate-entity-manager.jar(可在hibernate 5.5.2 zip的dist \ lib \ optional \ jpa目錄中找到),然後下載並添加jta-1.1來解決此問題。罐 –