找不到類：javax.persistence.spi.ProviderUtil

我試圖用JPA設置一個簡單的彈簧web應用程序，但在運行mvn spring-boot:run後，我得到了以下堆棧跟蹤。當然，我試圖搜索，發現類不在「類路徑」中，但不知道類路徑在這種情況下意味着什麼，我怎樣才能添加一些東西，爲什麼我需要它。所以有一點幫助會很棒。找不到類：javax.persistence.spi.ProviderUtil

[WARNING] 
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 org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run(AbstractRunMojo.java:506) 
     at java.lang.Thread.run(Thread.java:748) 
Caused by: java.lang.NoClassDefFoundError: javax/persistence/spi/ProviderUtil 
     at java.lang.Class.getDeclaredConstructors0(Native Method) 
     at java.lang.Class.privateGetDeclaredConstructors(Class.java:2671) 
     at java.lang.Class.getConstructor0(Class.java:3075) 
     at java.lang.Class.newInstance(Class.java:412) 
     at javax.persistence.Persistence.findAllProviders(Persistence.java:112) 
     at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:79) 
     at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:60) 
     at hu.creativetribes.sga.configurations.PersistenceManager.<init>(PersistenceManager.java:13) 
     at hu.creativetribes.sga.configurations.PersistenceManager.<clinit>(PersistenceManager.java:8) 
     at hu.creativetribes.sga.Application.main(Application.java:18) 
     ... 6 more 
Caused by: java.lang.ClassNotFoundException: javax.persistence.spi.ProviderUtil 
     at java.net.URLClassLoader.findClass(URLClassLoader.java:381) 
     at java.lang.ClassLoader.loadClass(ClassLoader.java:424) 
     at java.lang.ClassLoader.loadClass(ClassLoader.java:357) 
     ... 16 more

這裏是我的主要方法，這是一個測試持續的對象：

@SpringBootApplication 
public class Application { 

    public static void main(String[] args) { 
     SpringApplication.run(Application.class, args); 

     Partner partner = new Partner("test", "test", "test", "test", "test", "test"); 

     EntityManager em = PersistenceManager.INSTANCE.getEntityManager(); 
     em.getTransaction().begin(); 
     em.persist(partner); 
     em.getTransaction().commit(); 
     em.close(); 
     PersistenceManager.INSTANCE.close(); 

    } 

}

持久化管理枚舉：

public enum PersistenceManager { 
    INSTANCE; 

    private EntityManagerFactory emFactory; 

    private PersistenceManager() { 
     emFactory = Persistence.createEntityManagerFactory("sga-jpa"); 
    } 

    public EntityManager getEntityManager() { 
     return emFactory.createEntityManager(); 
    } 

    public void close() { 
     emFactory.close(); 
    } 

}

我的persistence.xml：

<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="sga-jpa" transaction-type="RESOURCE_LOCAL"> 
     <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider> 
     <properties> 
      <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost/sg_be" /> 
      <property name="javax.persistence.jdbc.user" value="root" /> 
      <property name="javax.persistence.jdbc.password" value="" /> 
      <property name="javax.persistence.jdbc.driver" value="com.mysql.cj.jdbc.Driver" /> 
      <property name="hibernate.show_sql" value="true" /> 
      <property name="hibernate.format_sql" value="true" /> 
      <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect" /> 
      <property name="hibernate.hbm2ddl.auto" value="validate" /> 

      <property name="hibernate.c3p0.min_size" value="5" /> 
      <property name="hibernate.c3p0.max_size" value="20" /> 
      <property name="hibernate.c3p0.timeout" value="500" /> 
      <property name="hibernate.c3p0.max_statements" value="50" /> 
      <property name="hibernate.c3p0.idle_test_period" value="2000" /> 
     </properties> 
    </persistence-unit> 
</persistence>

最後是我的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/maven-v4_0_0.xsd"> 


    <modelVersion>4.0.0</modelVersion> 
    <groupId>stackoverflow_heplme</groupId> 
    <artifactId>sga</artifactId> 
    <packaging>war</packaging> 
    <version>1.0-VIVALDI</version> <!-- Haha, spring. --> 

    <parent> 
     <groupId>org.springframework.boot</groupId> 
     <artifactId>spring-boot-starter-parent</artifactId> 
     <version>1.4.1.RELEASE</version> 
    </parent> 

    <properties> 
     <java-version>1.8</java-version> 
     <hibernate.version>4.3.6.Final</hibernate.version> 
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> 
    </properties> 

    <dependencies> 

     <dependency> 
      <groupId>com.google.appengine.orm</groupId> 
      <artifactId>datanucleus-appengine</artifactId> 
      <version>2.1.2</version> 
     </dependency> 

     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-web</artifactId> 
     </dependency> 

     <dependency> 
      <groupId>javax.persistence</groupId> 
      <artifactId>persistence-api</artifactId> 
      <version>1.0</version> 
     </dependency> 

     <dependency> 
      <groupId>org.hibernate</groupId> 
      <artifactId>hibernate-entitymanager</artifactId> 
      <version>${hibernate.version}</version> 
      <exclusions> 
       <exclusion> 
        <groupId>org.hibernate.javax.persistence</groupId> 
        <artifactId>hibernate-jpa-2.1-api</artifactId> 
       </exclusion> 
      </exclusions> 
     </dependency> 

     <dependency> 
      <groupId>org.hibernate</groupId> 
      <artifactId>hibernate-c3p0</artifactId> 
      <version>${hibernate.version}</version> 
     </dependency> 

     <dependency> 
      <groupId>mysql</groupId> 
      <artifactId>mysql-connector-java</artifactId> 
     </dependency> 

     <dependency> 
      <groupId>junit</groupId> 
      <artifactId>junit</artifactId> 
      <version>4.11</version> 
      <scope>test</scope> 
      <exclusions> 
       <exclusion> 
        <groupId>org.hamcrest</groupId> 
        <artifactId>hamcrest-core</artifactId> 
       </exclusion> 
      </exclusions> 
     </dependency> 

     <dependency> 
      <groupId>org.hamcrest</groupId> 
      <artifactId>hamcrest-all</artifactId> 
      <version>1.3</version> 
      <scope>test</scope> 
     </dependency> 

    </dependencies> 


    <build> 
     <finalName>sga</finalName> 
     <plugins> 
      <plugin> 
       <groupId>org.apache.maven.plugins</groupId> 
       <artifactId>maven-compiler-plugin</artifactId> 
       <version>2.5.1</version> 
       <configuration> 
        <source>${java.version}</source> 
        <target>${java.version}</target> 
        <compilerArgument>-Xlint:all</compilerArgument> 
        <showWarnings>true</showWarnings> 
        <showDeprecation>true</showDeprecation> 

       </configuration> 
      </plugin> 
     </plugins> 
    </build> 

</project>

來源

2017-07-20 Hienz

的可能的複製[拋出java.lang.ClassNotFoundException：javax.persistence.spi.PersistenceProvider] （https://stackoverflow.com/questions/13584269/java-lang-classnotfoundexception-javax-persistence-spi-persistenceprovider） – JFPicard

在這種情況下，classpath指的是你在你的pom文件中的所有東西。 –

首先，如果你想使用hibernate，你不需要創建entityManager，因爲它會隨springboot bundle一起提供，持久性提供者也會在依賴關係下生成backround，所以你也不需要persistence.xml，你可以在pom .xml和application.properties。

org.springframework.boot 彈簧引導起動數據JPA

此添加你的pom.xml

來源

2017-07-20 20:26:15 eyupaksu

您是否嘗試過使用jpa 2.1依賴項而不是1.0？

來源

2017-07-20 20:18:37

找不到類：javax.persistence.spi.ProviderUtil

回答

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