连接 PersistenceManagerFactory 和 Persistence.xml 时出错
Error in connecting PersistenceManagerFactoryand Persistence.xml
我的目标是在java中使用datanucleus、h2数据库做CRUD操作。但卡在连接 PersistenceManagerFactory 和 persistence.xml
我尝试过不同版本的 datanucleus-core、h2database、datanucleus-api-jdo。我目前参考的是官方文档：http://www.datanucleus.org/products/accessplatform/jdo/getting_started.html
主要代码文件
import javax.jdo.JDOHelper;
import javax.jdo.PersistenceManager;
import javax.jdo.PersistenceManagerFactory;
public class Main {
public static void main(String[] args)
{
PersistenceManagerFactory pmf = JDOHelper.getPersistenceManagerFactory("Tutorial");
PersistenceManager pm = pmf.getPersistenceManager();
pm.currentTransaction().begin();
try {
Users user = new Users();
user.setId(1);
user.setUser("himmat");
user.setEmail("xyz@gmail.com");
user.setMobileNo("7896585687");
pm.currentTransaction().commit();
}finally {
if(pm.currentTransaction().isActive())
{
pm.currentTransaction().rollback();
}
pm.close();
}
}
}
persistence.xml
<?xml version="1.0" encoding="UTF-8" ?>
<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">
<!-- JDO tutorial "unit" -->
<persistence-unit name="Tutorial">
<class>Users</class>
<exclude-unlisted-classes/>
<properties>
<property name="javax.jdo.option.ConnectionURL" value="jdbc:h2:mem:nucleus1"/>
<property name="javax.jdo.option.ConnectionUserName" value="sa"/>
<property name="javax.jdo.option.ConnectionPassword" value=""/>
<property name="datanucleus.schema.autoCreateAll" value="true"/>
</properties>
</persistence-unit>
</persistence>
错误代码
"C:\Program Files\Java\jdk1.8.0_211\bin\java.exe" "-javaagent:C:\Users\shyam\AppData\Local\JetBrains\IntelliJ IDEA 2019.1.3\lib\idea_rt.jar=56680:C:\Users\shyam\AppData\Local\JetBrains\IntelliJ IDEA 2019.1.3\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_211\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\rt.jar;C:\Users\shyam\eclipse-workspace\DemoJDO\target\classes;C:\Users\shyam\.m2\repository\org\datanucleus\datanucleus-api-jdo.2.1\datanucleus-api-jdo-5.2.1.jar;C:\Users\shyam\.m2\repository\org\datanucleus\datanucleus-core.2.1\datanucleus-core-5.2.1.jar;C:\Users\shyam\.m2\repository\org\datanucleus\datanucleus-rdbms.2.1\datanucleus-rdbms-5.2.1.jar;C:\Users\shyam\.m2\repository\javax\jdo\jdo-api.0.1\jdo-api-3.0.1.jar;C:\Users\shyam\.m2\repository\javax\transaction\jta.1\jta-1.1.jar" Main
Exception in thread "main" javax.jdo.JDOFatalUserException: A property named javax.jdo.PersistenceManagerFactoryClass must be specified, or a jar file with a META-INF/services/javax.jdo.PersistenceManagerFactory entry must be in the classpath, or a property named javax.jdo.option.PersistenceUnitName must be specified.
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:861)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:1099)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:919)
at Main.main(Main.java:8)
NestedThrowablesStackTrace:
javax.jdo.JDOException: Errors were encountered when loading the MetaData for the persistence-unit "Tutorial". See the nested exceptions for details
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.initialiseMetaData(JDOPersistenceManagerFactory.java:807)
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.<init>(JDOPersistenceManagerFactory.java:600)
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.createPersistenceManagerFactory(JDOPersistenceManagerFactory.java:316)
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.getPersistenceManagerFactory(JDOPersistenceManagerFactory.java:225)
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 javax.jdo.JDOHelper.run(JDOHelper.java:1965)
at java.security.AccessController.doPrivileged(Native Method)
at javax.jdo.JDOHelper.invoke(JDOHelper.java:1960)
at javax.jdo.JDOHelper.invokeGetPersistenceManagerFactoryOnImplementation(JDOHelper.java:1166)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:844)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:1099)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:919)
at Main.main(Main.java:8)
NestedThrowablesStackTrace:
Errors were encountered when loading the MetaData for the persistence-unit "Tutorial". See the nested exceptions for details
org.datanucleus.exceptions.NucleusUserException: Errors were encountered when loading the MetaData for the persistence-unit "Tutorial". See the nested exceptions for details
at org.datanucleus.metadata.MetaDataManagerImpl.loadPersistenceUnit(MetaDataManagerImpl.java:1124)
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.initialiseMetaData(JDOPersistenceManagerFactory.java:797)
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.<init>(JDOPersistenceManagerFactory.java:600)
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.createPersistenceManagerFactory(JDOPersistenceManagerFactory.java:316)
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.getPersistenceManagerFactory(JDOPersistenceManagerFactory.java:225)
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 javax.jdo.JDOHelper.run(JDOHelper.java:1965)
at java.security.AccessController.doPrivileged(Native Method)
at javax.jdo.JDOHelper.invoke(JDOHelper.java:1960)
at javax.jdo.JDOHelper.invokeGetPersistenceManagerFactoryOnImplementation(JDOHelper.java:1166)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:844)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:1099)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:919)
at Main.main(Main.java:8)
Caused by: java.lang.NoClassDefFoundError: javax/jdo/AttributeConverter$UseDefault
at org.datanucleus.api.jdo.metadata.JDOAnnotationReader.processMemberAnnotations(JDOAnnotationReader.java:955)
at org.datanucleus.metadata.annotations.AbstractAnnotationReader.getMetaDataForClass(AbstractAnnotationReader.java:251)
at org.datanucleus.metadata.annotations.AnnotationManagerImpl.getMetaDataForClass(AnnotationManagerImpl.java:190)
at org.datanucleus.metadata.MetaDataManagerImpl.loadAnnotationsForClass(MetaDataManagerImpl.java:2818)
at org.datanucleus.metadata.MetaDataManagerImpl.loadPersistenceUnit(MetaDataManagerImpl.java:1095)
... 16 more
Caused by: java.lang.ClassNotFoundException: javax.jdo.AttributeConverter$UseDefault
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 21 more
Nested Throwables StackTrace:
java.lang.NoClassDefFoundError: javax/jdo/AttributeConverter$UseDefault
at org.datanucleus.api.jdo.metadata.JDOAnnotationReader.processMemberAnnotations(JDOAnnotationReader.java:955)
at org.datanucleus.metadata.annotations.AbstractAnnotationReader.getMetaDataForClass(AbstractAnnotationReader.java:251)
at org.datanucleus.metadata.annotations.AnnotationManagerImpl.getMetaDataForClass(AnnotationManagerImpl.java:190)
at org.datanucleus.metadata.MetaDataManagerImpl.loadAnnotationsForClass(MetaDataManagerImpl.java:2818)
at org.datanucleus.metadata.MetaDataManagerImpl.loadPersistenceUnit(MetaDataManagerImpl.java:1095)
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.initialiseMetaData(JDOPersistenceManagerFactory.java:797)
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.<init>(JDOPersistenceManagerFactory.java:600)
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.createPersistenceManagerFactory(JDOPersistenceManagerFactory.java:316)
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.getPersistenceManagerFactory(JDOPersistenceManagerFactory.java:225)
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 javax.jdo.JDOHelper.run(JDOHelper.java:1965)
at java.security.AccessController.doPrivileged(Native Method)
at javax.jdo.JDOHelper.invoke(JDOHelper.java:1960)
at javax.jdo.JDOHelper.invokeGetPersistenceManagerFactoryOnImplementation(JDOHelper.java:1166)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:844)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:1099)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:919)
at Main.main(Main.java:8)
Caused by: java.lang.ClassNotFoundException: javax.jdo.AttributeConverter$UseDefault
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 21 more
Process finished with exit code 1
您可以使用属性代替 persistence.xml
实际上，我已经使用属性做了一个类似的例子。另一个问题是你可能缺少一些依赖项，我正在分享 pom.xml。尝试使用你可能会得到结果。如果您使用 Maven，这很容易做到。您还需要对其进行增强，如官方文档中所示。
http://www.datanucleus.org/products/accessplatform/jdo/getting_started.html
为此，您需要关注
http://www.datanucleus.org/products/accessplatform_3_2/jdo/enhancer.html
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>com.automated</groupId>
<artifactId>DemoJDO</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-api-jdo</artifactId>
<version>5.2.1</version>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>1.4.199</version>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-rdbms</artifactId>
<version>5.2.1</version>
</dependency>
<dependency>
<groupId>javax.jdo</groupId>
<artifactId>jdo-api</artifactId>
<version>3.1</version>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-core</artifactId>
<version>5.2.1</version>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>javax.jdo</artifactId>
<version>3.2.0-m3</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-maven-plugin</artifactId>
<version>3.2.0-m3</version>
<configuration>
<log4jConfiguration>${basedir}/log4j.properties</log4jConfiguration>
<verbose>true</verbose>
</configuration>
<executions>
<execution>
<phase>process-classes</phase>
<goals>
<goal>enhance</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
主文件代码
public static void main(String[] args)
{
Properties properties = new Properties();
properties.setProperty("javax.jdo.PersistenceManagerFactoryClass",
"org.datanucleus.api.jdo.JDOPersistenceManagerFactory");
properties.setProperty("javax.jdo.option.ConnectionDriverName","org.h2.Driver");
properties.setProperty("javax.jdo.option.ConnectionURL","jdbc:h2:~/test");
properties.setProperty("javax.jdo.option.ConnectionUserName","sa");
properties.setProperty("javax.jdo.option.ConnectionPassword","");
properties.setProperty("datanucleus.schema.autoCreateAll","true");
PersistenceManagerFactory pmf = JDOHelper.getPersistenceManagerFactory(properties);
PersistenceManager pm = pmf.getPersistenceManager();
pm.currentTransaction().begin();
try {
//...
//You can use your logic here
//...
pm.currentTransaction().commit();
}finally {
if(pm.currentTransaction().isActive())
{
pm.currentTransaction().rollback();
}
pm.close();
}
}
我的目标是在java中使用datanucleus、h2数据库做CRUD操作。但卡在连接 PersistenceManagerFactory 和 persistence.xml
我尝试过不同版本的 datanucleus-core、h2database、datanucleus-api-jdo。我目前参考的是官方文档：http://www.datanucleus.org/products/accessplatform/jdo/getting_started.html
主要代码文件
import javax.jdo.JDOHelper;
import javax.jdo.PersistenceManager;
import javax.jdo.PersistenceManagerFactory;
public class Main {
public static void main(String[] args)
{
PersistenceManagerFactory pmf = JDOHelper.getPersistenceManagerFactory("Tutorial");
PersistenceManager pm = pmf.getPersistenceManager();
pm.currentTransaction().begin();
try {
Users user = new Users();
user.setId(1);
user.setUser("himmat");
user.setEmail("xyz@gmail.com");
user.setMobileNo("7896585687");
pm.currentTransaction().commit();
}finally {
if(pm.currentTransaction().isActive())
{
pm.currentTransaction().rollback();
}
pm.close();
}
}
}
persistence.xml
<?xml version="1.0" encoding="UTF-8" ?>
<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">
<!-- JDO tutorial "unit" -->
<persistence-unit name="Tutorial">
<class>Users</class>
<exclude-unlisted-classes/>
<properties>
<property name="javax.jdo.option.ConnectionURL" value="jdbc:h2:mem:nucleus1"/>
<property name="javax.jdo.option.ConnectionUserName" value="sa"/>
<property name="javax.jdo.option.ConnectionPassword" value=""/>
<property name="datanucleus.schema.autoCreateAll" value="true"/>
</properties>
</persistence-unit>
</persistence>
错误代码
"C:\Program Files\Java\jdk1.8.0_211\bin\java.exe" "-javaagent:C:\Users\shyam\AppData\Local\JetBrains\IntelliJ IDEA 2019.1.3\lib\idea_rt.jar=56680:C:\Users\shyam\AppData\Local\JetBrains\IntelliJ IDEA 2019.1.3\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_211\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_211\jre\lib\rt.jar;C:\Users\shyam\eclipse-workspace\DemoJDO\target\classes;C:\Users\shyam\.m2\repository\org\datanucleus\datanucleus-api-jdo.2.1\datanucleus-api-jdo-5.2.1.jar;C:\Users\shyam\.m2\repository\org\datanucleus\datanucleus-core.2.1\datanucleus-core-5.2.1.jar;C:\Users\shyam\.m2\repository\org\datanucleus\datanucleus-rdbms.2.1\datanucleus-rdbms-5.2.1.jar;C:\Users\shyam\.m2\repository\javax\jdo\jdo-api.0.1\jdo-api-3.0.1.jar;C:\Users\shyam\.m2\repository\javax\transaction\jta.1\jta-1.1.jar" Main
Exception in thread "main" javax.jdo.JDOFatalUserException: A property named javax.jdo.PersistenceManagerFactoryClass must be specified, or a jar file with a META-INF/services/javax.jdo.PersistenceManagerFactory entry must be in the classpath, or a property named javax.jdo.option.PersistenceUnitName must be specified.
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:861)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:1099)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:919)
at Main.main(Main.java:8)
NestedThrowablesStackTrace:
javax.jdo.JDOException: Errors were encountered when loading the MetaData for the persistence-unit "Tutorial". See the nested exceptions for details
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.initialiseMetaData(JDOPersistenceManagerFactory.java:807)
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.<init>(JDOPersistenceManagerFactory.java:600)
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.createPersistenceManagerFactory(JDOPersistenceManagerFactory.java:316)
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.getPersistenceManagerFactory(JDOPersistenceManagerFactory.java:225)
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 javax.jdo.JDOHelper.run(JDOHelper.java:1965)
at java.security.AccessController.doPrivileged(Native Method)
at javax.jdo.JDOHelper.invoke(JDOHelper.java:1960)
at javax.jdo.JDOHelper.invokeGetPersistenceManagerFactoryOnImplementation(JDOHelper.java:1166)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:844)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:1099)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:919)
at Main.main(Main.java:8)
NestedThrowablesStackTrace:
Errors were encountered when loading the MetaData for the persistence-unit "Tutorial". See the nested exceptions for details
org.datanucleus.exceptions.NucleusUserException: Errors were encountered when loading the MetaData for the persistence-unit "Tutorial". See the nested exceptions for details
at org.datanucleus.metadata.MetaDataManagerImpl.loadPersistenceUnit(MetaDataManagerImpl.java:1124)
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.initialiseMetaData(JDOPersistenceManagerFactory.java:797)
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.<init>(JDOPersistenceManagerFactory.java:600)
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.createPersistenceManagerFactory(JDOPersistenceManagerFactory.java:316)
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.getPersistenceManagerFactory(JDOPersistenceManagerFactory.java:225)
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 javax.jdo.JDOHelper.run(JDOHelper.java:1965)
at java.security.AccessController.doPrivileged(Native Method)
at javax.jdo.JDOHelper.invoke(JDOHelper.java:1960)
at javax.jdo.JDOHelper.invokeGetPersistenceManagerFactoryOnImplementation(JDOHelper.java:1166)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:844)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:1099)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:919)
at Main.main(Main.java:8)
Caused by: java.lang.NoClassDefFoundError: javax/jdo/AttributeConverter$UseDefault
at org.datanucleus.api.jdo.metadata.JDOAnnotationReader.processMemberAnnotations(JDOAnnotationReader.java:955)
at org.datanucleus.metadata.annotations.AbstractAnnotationReader.getMetaDataForClass(AbstractAnnotationReader.java:251)
at org.datanucleus.metadata.annotations.AnnotationManagerImpl.getMetaDataForClass(AnnotationManagerImpl.java:190)
at org.datanucleus.metadata.MetaDataManagerImpl.loadAnnotationsForClass(MetaDataManagerImpl.java:2818)
at org.datanucleus.metadata.MetaDataManagerImpl.loadPersistenceUnit(MetaDataManagerImpl.java:1095)
... 16 more
Caused by: java.lang.ClassNotFoundException: javax.jdo.AttributeConverter$UseDefault
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 21 more
Nested Throwables StackTrace:
java.lang.NoClassDefFoundError: javax/jdo/AttributeConverter$UseDefault
at org.datanucleus.api.jdo.metadata.JDOAnnotationReader.processMemberAnnotations(JDOAnnotationReader.java:955)
at org.datanucleus.metadata.annotations.AbstractAnnotationReader.getMetaDataForClass(AbstractAnnotationReader.java:251)
at org.datanucleus.metadata.annotations.AnnotationManagerImpl.getMetaDataForClass(AnnotationManagerImpl.java:190)
at org.datanucleus.metadata.MetaDataManagerImpl.loadAnnotationsForClass(MetaDataManagerImpl.java:2818)
at org.datanucleus.metadata.MetaDataManagerImpl.loadPersistenceUnit(MetaDataManagerImpl.java:1095)
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.initialiseMetaData(JDOPersistenceManagerFactory.java:797)
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.<init>(JDOPersistenceManagerFactory.java:600)
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.createPersistenceManagerFactory(JDOPersistenceManagerFactory.java:316)
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.getPersistenceManagerFactory(JDOPersistenceManagerFactory.java:225)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at javax.jdo.JDOHelper.run(JDOHelper.java:1965)
at java.security.AccessController.doPrivileged(Native Method)
at javax.jdo.JDOHelper.invoke(JDOHelper.java:1960)
at javax.jdo.JDOHelper.invokeGetPersistenceManagerFactoryOnImplementation(JDOHelper.java:1166)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:844)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:1099)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:919)
at Main.main(Main.java:8)
Caused by: java.lang.ClassNotFoundException: javax.jdo.AttributeConverter$UseDefault
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 21 more
Process finished with exit code 1
您可以使用属性代替 persistence.xml 实际上，我已经使用属性做了一个类似的例子。另一个问题是你可能缺少一些依赖项，我正在分享 pom.xml。尝试使用你可能会得到结果。如果您使用 Maven，这很容易做到。您还需要对其进行增强，如官方文档中所示。
http://www.datanucleus.org/products/accessplatform/jdo/getting_started.html
为此，您需要关注
http://www.datanucleus.org/products/accessplatform_3_2/jdo/enhancer.html
POM.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.automated</groupId>
<artifactId>DemoJDO</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-api-jdo</artifactId>
<version>5.2.1</version>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>1.4.199</version>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-rdbms</artifactId>
<version>5.2.1</version>
</dependency>
<dependency>
<groupId>javax.jdo</groupId>
<artifactId>jdo-api</artifactId>
<version>3.1</version>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-core</artifactId>
<version>5.2.1</version>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>javax.jdo</artifactId>
<version>3.2.0-m3</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-maven-plugin</artifactId>
<version>3.2.0-m3</version>
<configuration>
<log4jConfiguration>${basedir}/log4j.properties</log4jConfiguration>
<verbose>true</verbose>
</configuration>
<executions>
<execution>
<phase>process-classes</phase>
<goals>
<goal>enhance</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
主文件代码
public static void main(String[] args)
{
Properties properties = new Properties();
properties.setProperty("javax.jdo.PersistenceManagerFactoryClass",
"org.datanucleus.api.jdo.JDOPersistenceManagerFactory");
properties.setProperty("javax.jdo.option.ConnectionDriverName","org.h2.Driver");
properties.setProperty("javax.jdo.option.ConnectionURL","jdbc:h2:~/test");
properties.setProperty("javax.jdo.option.ConnectionUserName","sa");
properties.setProperty("javax.jdo.option.ConnectionPassword","");
properties.setProperty("datanucleus.schema.autoCreateAll","true");
PersistenceManagerFactory pmf = JDOHelper.getPersistenceManagerFactory(properties);
PersistenceManager pm = pmf.getPersistenceManager();
pm.currentTransaction().begin();
try {
//...
//You can use your logic here
//...
pm.currentTransaction().commit();
}finally {
if(pm.currentTransaction().isActive())
{
pm.currentTransaction().rollback();
}
pm.close();
}
}