Hibernate - EntityManager没有持久性提供程序

时间：2016-07-02 11:04:04

标签： java eclipse hibernate maven jpa

我知道关于这个话题已经有很多问题，但到目前为止我已经尝试了所有内容并阅读了我能找到的所有内容，但它仍然没有解决我的问题。

我使用Hibernate 5.2.1在Eclipse中开发Java应用程序。 Final和SQLite JDBC（Xerial 3.8.11.2）和Maven。每当我尝试从Eclipse运行项目时，我都会遇到这个令人讨厌的例外：

    Exception in thread "JavaFX Application Thread" Exception in thread "main" java.lang.ExceptionInInitializerError
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:348)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplicationWithArgs$156(LauncherImpl.java:352)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
    at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
    at java.lang.Thread.run(Thread.java:745)
Caused by: javax.persistence.PersistenceException: No Persistence provider for EntityManager named database
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:85)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54)
    at pl.nombritech.Produktor.Main.<clinit>(Main.java:18)
    ... 11 more
java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:767)
Caused by: java.lang.NullPointerException
    at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:383)
    at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
    ... 5 more

当然，我检查了我的META-INF目录是否在正确的位置（src / main / resources / META-INF / persistence.xml），以及它是否包含在类路径中。持久性单元名称也与Main类中给出的名称相对应：

public static final EntityManagerFactory ENTITY_MANAGER_FACTORY = Persistence.createEntityManagerFactory(
    "database");

我不知道为什么会这样。每当我尝试从.jar启动它时，我会得到另一个例外：

    Exception in thread "JavaFX Application Thread" java.lang.NoClassDefFoundError: javax/persistence/Persistence
        at pl.nombritech.Produktor.Main.<clinit>(Main.java:18)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Unknown Source)
        at com.sun.javafx.application.LauncherImpl.lambda$launchApplicationWithArgs$156(LauncherImpl.java:352)
        at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
        at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
        at java.security.AccessController.doPrivileged(Native Method)
        at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
        at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
        at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
        at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
        at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: javax.persistence.Persistence
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        ... 12 more
Exception in thread "main" java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at sun.launcher.LauncherHelper$FXHelper.main(Unknown Source)
Caused by: java.lang.NullPointerException
        at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:383)
        at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
        ... 5 more

最后，我附上了我的POM.xml和persistence.xml：

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>pl.nombritech</groupId>
    <artifactId>Produktor</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>Produktor</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <build>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>

            <!-- LIBRARIES IN LIB DIRECTORY -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-dependency-plugin</artifactId>
                <executions>
                    <execution>
                        <id>copy-dependencies</id>
                        <phase>prepare-package</phase>
                        <goals>
                            <goal>copy-dependencies</goal>
                        </goals>
                        <configuration>
                            <outputDirectory>${project.build.directory}/classes/lib</outputDirectory>
                            <overWriteReleases>false</overWriteReleases>
                            <overWriteSnapshots>false</overWriteSnapshots>
                            <overWriteIfNewer>true</overWriteIfNewer>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <configuration>
                    <archive>
                        <manifest>
                            <addClasspath>true</addClasspath>
                            <!-- <classpathPrefix>lib</classpathPrefix> -->
                            <mainClass>pl.nombritech.Produktor.Main</mainClass>
                        </manifest>
                        <manifestEntries>
                            <Class-Path>lib/</Class-Path>
                        </manifestEntries>
                    </archive>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <dependencies>
        <!-- https://mvnrepository.com/artifact/org.xerial/sqlite-jdbc -->
        <dependency>
            <groupId>org.xerial</groupId>
            <artifactId>sqlite-jdbc</artifactId>
            <version>3.8.11.2</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.eclipse.persistence/javax.persistence -->
        <dependency>
            <groupId>org.eclipse.persistence</groupId>
            <artifactId>javax.persistence</artifactId>
            <version>2.1.1</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.hibernate.javax.persistence/hibernate-jpa-2.1-api -->
        <dependency>
            <groupId>org.hibernate.javax.persistence</groupId>
            <artifactId>hibernate-jpa-2.1-api</artifactId>
            <version>1.0.0.Final</version>
        </dependency>


        <!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-core -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>5.2.1.Final</version>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

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="database" transaction-type="RESOURCE_LOCAL">
        <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
        <properties>
            <property name="javax.persistence.jdbc.driver" value="org.sqlite.JDBC" />
            <property name="javax.persistence.jdbc.user" value="" />
            <property name="javax.persistence.jdbc.password" value="" />
            <property name="javax.persistence.jdbc.url" value="jdbc:sqlite:bazadb.db" />
            <property name="hibernate.dialect" value="pl.nombritech.Produktor.util.SQLiteDialect" />
            <!-- create-drop tworzy i kasuje, create tworzy tylko -->
            <property name="hibernate.hbm2ddl.auto" value="create"></property>
        </properties>
    </persistence-unit>
</persistence>

我将非常感谢所有的帮助。请不要写它是重复的，因为我搜索了这些主题的解决方案，但没有一个对我有帮助。非常感谢您的帮助。

PS。我尝试使用以前主要版本的Hibernate进行此配置（4.3.11.Final - 我想我只使用了另一个提供程序：org.hibernate.ejb.HibernatePersistence现已弃用且在Hibernate-Core 5中不存在）并且它可以用作一个魅力，所以我真的不知道版本5中发生了什么，它的行为如此不同。

编辑：

Eclipse中的项目结构是：

Project structure in Eclipse

EDIT3：

上传我的项目（我自己的托管）：

Download my project (Eclipse Project)

1 个答案:

答案 0 :(得分：1)

为什么要混合使用eclipseLink和hibernate？ 使用

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-entitymanager</artifactId>
    <version>5.2.1.Final</version>
</dependency>

并删除eclipseLink依赖项

你的副本依赖目标应该

<outputDirectory>${project.build.directory}/lib</outputDirectory>

最后，在构建jar时，请在maven-jar-plugin中使用此代码段。罐子应该在你的主罐子外面，而不是在它里面

                    <archive>
                        <manifest>
                            <addClasspath>true</addClasspath>
                            <classpathPrefix>lib</classpathPrefix>
                            <mainClass>pl.nombritech.Produktor.Main</mainClass>
                        </manifest>
                    </archive>
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