当我编译我的Maven项目时，它说我的实体已经增强。但是，当我通过EntityManagerFactory启动数据库连接时，错误发生在这里的代码：em = factory.createEntityManager（）;我相信我已经遵循网络中的所有步骤..但是我遇到了这个错误。请帮忙......对此有何建议？非常感谢你。
错误导致错误的部分代码。
factory = Persistence.createEntityManagerFactory("LotMovementPU");
em = factory.createEntityManager();
Tihs是编译时的日志。
nothing to compile - all classes are up to date
[openjpa:enhance]
52 LotMovementPU INFO [main] openjpa.Tool - Enhancer running on type "class lotmovement.business.entity.UserProfile".
[resources:testResources]
[debug] execute contextualize
Using 'UTF-8' encoding to copy filtered resources.
skip non existing resourceDirectory C:\Users\god-gavedmework\Documents\NetBeansProjects\lotmovementMaven\src\test\resources
[compiler:testCompile]
No sources to compile
[surefire:test]
No tests to run.
Surefire report directory: C:\Users\god-gavedmework\Documents\NetBeansProjects\lotmovementMaven\target\surefire-reports
-------------------------------------------------------
T E S T S
-------------------------------------------------------
Results :
Tests run: 0, Failures: 0, Errors: 0, Skipped: 0
[war:war]
Packaging webapp
Warning: selected war files include a WEB-INF/web.xml which will be ignored
(webxml attribute is missing from war task, or ignoreWebxml attribute is specified as 'true')
------------------------------------------------------------------------
BUILD SUCCESS
------------------------------------------------------------------------
Total time: 8.386s
Finished at: Thu Nov 29 14:21:58 NZDT 2012
Final Memory: 22M/437M
------------------------------------------------------------------------
NetBeans: Deploying on Apache Tomcat 7.0.27.0
profile mode: false
debug mode: true
force redeploy: true
步骤到em.factory.createEntityManager（）;
时出错<openjpa-2.2.0-r422266:1244990 nonfatal user error> org.apache.openjpa.persistence.ArgumentException: This configuration disallows runtime optimization, but the following listed types were not enhanced at build time or at class load time with a javaagent: "
lotmovement.business.entity.UserProfile".
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>com.mycompany</groupId>
<artifactId>LotMovement</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>LotMovement</name>
<properties>
<endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<netbeans.hint.deploy.server>Tomcat</netbeans.hint.deploy.server>
</properties>
<repositories>
<repository>
<id>JBoss Repo</id>
<url>http://repository.jboss.com/maven2</url>
<name>JBoss Repo</name>
</repository>
<repository>
<id>ibiblio mirror</id>
<url>http://mirrors.ibiblio.org/pub/mirrors/maven2/</url>
</repository>
<repository>
<id>jboss-public-repository-group</id>
<name>JBoss Public Maven Repository Group</name>
<url>https://repository.jboss.org/nexus/content/groups/public/</url>
<layout>default</layout>
<releases>
<enabled>true</enabled>
<updatePolicy>never</updatePolicy>
</releases>
<snapshots>
<enabled>true</enabled>
<updatePolicy>never</updatePolicy>
</snapshots>
</repository>
<repository>
<url>http://ftp.ing.umu.se/mirror/eclipse/rt/eclipselink/maven.repo</url>
<id>eclipselink</id>
<layout>default</layout>
<name>Repository for library Library[eclipselink]</name>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-convention-plugin</artifactId>
<version>2.3.4</version>
</dependency>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-web-api</artifactId>
<version>6.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.openjpa</groupId>
<artifactId>openjpa</artifactId>
<!-- set the version to be the same as the level in your runtime -->
<version>2.2.0</version>
</dependency>
<dependency>
<groupId>org.apache.openjpa</groupId>
<artifactId>openjpa-all</artifactId>
<version>2.2.0</version>
</dependency>
<dependency>
<groupId>org.apache.openjpa</groupId>
<artifactId>openjpa-maven-plugin</artifactId>
<!-- set the version to be the same as the level in your runtime -->
<version>2.2.0</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>javassist</groupId>
<artifactId>javassist</artifactId>
<version>3.12.1.GA</version>
</dependency>
<!-- Spring framework -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring</artifactId>
<version>2.5.6.SEC03</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>2.5.6.SEC03</version>
</dependency>
<!-- Struts 2 + Spring plugins -->
<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-spring-plugin</artifactId>
<version>2.3.7</version>
</dependency>
<dependency>
<groupId>org.apache.derby</groupId>
<artifactId>derbyclient</artifactId>
<version>10.9.1.0</version>
</dependency>
<dependency>
<groupId>org.apache.derby</groupId>
<artifactId>derby</artifactId>
<version>10.9.1.0</version>
</dependency>
<dependency>
<groupId>org.apache.derby</groupId>
<artifactId>derbynet</artifactId>
<version>10.9.1.0</version>
</dependency>
<dependency>
<groupId>org.apache.derby</groupId>
<artifactId>derbytools</artifactId>
<version>10.9.1.0</version>
</dependency>
</dependencies>
<build>
<resources>
<resource>
<directory> src/main/java </directory>
<includes>
<include> **/*.xml </include>
</includes>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.openjpa</groupId>
<artifactId>openjpa-maven-plugin</artifactId>
<version>2.2.0</version>
<configuration>
<includes>lotmovement/business/entity/*.class</includes>
<addDefaultConstructor>true</addDefaultConstructor>
<enforcePropertyRestrictions>true</enforcePropertyRestrictions>
<!-- Pass additional properties to the Plugin here -->
<toolProperties>
<property>
<name>directory</name>
<value>otherdirectoryvalue</value>
</property>
</toolProperties>
</configuration>
<executions>
<execution>
<id>enhancer</id>
<phase>process-classes</phase>
<goals>
<goal>enhance</goal>
</goals>
</execution>
</executions>
</plugin>
<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>
<compilerArguments>
<endorseddirs>${endorsed.dir}</endorseddirs>
</compilerArguments>
<showDeprecation>true</showDeprecation>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.1.1</version>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.1</version>
<executions>
<execution>
<phase>validate</phase>
<goals>
<goal>copy</goal>
</goals>
<configuration>
<outputDirectory>${endorsed.dir}</outputDirectory>
<silent>true</silent>
<artifactItems>
<artifactItem>
<groupId>javax</groupId>
<artifactId>javaee-endorsed-api</artifactId>
<version>6.0</version>
<type>jar</type>
</artifactItem>
</artifactItems>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
的persistence.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
<persistence-unit name="LotMovementPU" transaction-type="RESOURCE_LOCAL">
<provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
<jta-data-source>openjpa</jta-data-source>
<class>lotmovement.business.entity.UserProfile</class>
<exclude-unlisted-classes>false</exclude-unlisted-classes>
<properties>
<property name="javax.persistence.jdbc.url" value="jdbc:derby://localhost:1527/sample"/>
<property name="javax.persistence.jdbc.password" value="app"/>
<property name="javax.persistence.jdbc.driver" value="org.apache.derby.jdbc.ClientDriver"/>
<property name="javax.persistence.jdbc.user" value="app"/>
<property name="openjpa.jdbc.SynchronizeMappings" value="buildSchema(ForeignKeys=true)"/>
</properties>
</persistence-unit>
</persistence>
关于构建这个的ANT风格，这是在BUILD.XML中找到的也许我的增强器没有发布编译增强它？如果是的话，你怎么能在maven中进行后编译增强？
build.xml以增强ant中的实体。
<target name="-post-compile">
<!-- Empty placeholder for easier customization. -->
<!-- You can override this target in the ../build.xml file. -->
<echo message="begin openJPAC"/>
<path id="openjpa.path.id">
<pathelement location="${build.classes.dir}"/>
<!-- Adding the OpenJPA jars into the classpath -->
<fileset dir="D:\openjpa\apache-openjpa-2.2.0\" includes="*.jar"/>
<!-- or if you create a OpenJPA Library you can use that instead -->
<!--<pathelement path="${libs.OpenJPA.classpath}"/>-->
</path>
<taskdef name="openjpac" classname="org.apache.openjpa.ant.PCEnhancerTask">
<classpath refid="openjpa.path.id"/>
</taskdef>
<openjpac>
<classpath refid="openjpa.path.id"/>
</openjpac>
<echo message="end openJPAC"/>
答案 0 :(得分：0)
我找到了解决方案。我删除了插件“openjpa-maven-plugin”并将其替换为POM.XML - Plugin元素中的（请参阅下面的插件。）。编译时，您将在下面看到此消息。请参阅编译消息。顺便说一句，我使用的是Netbeans 7.2.1，Maven和struts2-spring插件。
编译消息。 [antrun：运行] 执行任务 [java] 63 LotMovementPU INFO [main] openjpa.Tool - 在“lotmovement.business.entity.UserProfile”类型上运行的Enhancer。 执行的任务
的pom.xml
<plugin>
<artifactId>maven-antrun-plugin</artifactId>
<executions>
<execution>
<phase>process-classes</phase>
<configuration>
<tasks>
<java classname="org.apache.openjpa.enhance.PCEnhancer"
classpathref="maven.runtime.classpath"
dir="target/classes" fork="true" />
</tasks>
</configuration>
<goals>
<goal>run</goal>
</goals>
</execution>
</executions>
</plugin>