我有一个项目，其中Main-Method-class“Bootstrap.class”位于src / test文件夹中。所以我使用<classpathScope>test</classpathScope>
能够执行
mvn exec:java
我的问题：我得到一个“java.lang.IllegalArgumentException：未知实体：”因为我导入了某些类，它们位于main / java。关于如何解决这个问题的任何想法？
这是我的Pom：
<?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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>eu.peadrtx</groupId>
<artifactId>register</artifactId>
<packaging>war</packaging>
<version>1.6-SNAPSHOT</version>
<name>eu.peadrtx.register</name>
<properties>
<!-- Convenience property to set the GWT version -->
<gwtVersion>2.4.0</gwtVersion>
<!-- GWT needs at least java 1.6 -->
<maven.compiler.source>1.6</maven.compiler.source>
<maven.compiler.target>1.6</maven.compiler.target>
<!-- Don't let your Mac use a crazy non-standard encoding -->
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
</properties>
<!-- notwendig für einige gwt dependencies -->
<repositories>
<repository>
<id>gwt-maven-rewraps</id>
<url>http://gwt-maven-rewraps.googlecode.com/hg/</url>
</repository>
<repository>
<id>cobogw</id>
<name>Maven2 Repository for cobogw library</name>
<url>http://cobogw.googlecode.com/svn/maven2</url>
</repository>
<repository>
<id>openehealth.releases</id>
<name>Open eHealth Maven Repository</name>
<url>http://repo.openehealth.org/maven2/releases</url>
<releases>
<enabled>true</enabled>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
<repository>
<id>openehealth.snapshots</id>
<name>Open eHealth Maven Repository</name>
<url>http://repo.openehealth.org/maven2/snapshots</url>
<releases>
<enabled>false</enabled>
</releases>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
<repository>
<id>java.net</id>
<name>java.net Maven Repository</name>
<url>http://download.java.net/maven/2/</url>
</repository>
<repository>
<id>codehaus nexus</id>
<name>Codehaus Nexus Maven Repository</name>
<url>https://nexus.codehaus.org/content/repositories/releases/</url>
</repository>
<repository>
<id>codehaus</id>
<name>Codehaus Maven Repository</name>
<url>http://repository.codehaus.org</url>
</repository>
<repository>
<id>jboss</id>
<name>JBoss Maven Repository</name>
<url>http://repository.jboss.org/nexus/content/groups/public-jboss/</url>
</repository>
<repository>
<id>hapi-sf</id>
<name>HAPI Sourceforge Repository</name>
<url>http://hl7api.sourceforge.net/m2</url>
</repository>
</repositories>
<dependencies>
...
<!-- dependencies for the Unit tests -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-dev</artifactId>
<version>${gwtVersion}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-exec</artifactId>
<version>1.1</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.1.2</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpcore</artifactId>
<version>4.1.2</version>
</dependency>
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20080701</version>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-all</artifactId>
<version>1.8.5</version>
</dependency>
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-java</artifactId>
<version>2.15.0</version>
</dependency>
</dependencies>
<build>
<!-- Generate compiled stuff in the folder used for development mode -->
<outputDirectory>target/www/WEB-INF/classes</outputDirectory>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
</resources>
<testResources>
<testResource>
<directory>src/test/resources</directory>
<filtering>true</filtering>
</testResource>
</testResources>
<plugins>
<plugin>
<groupId>org.bsc.maven</groupId>
<artifactId>maven-processor-plugin</artifactId>
<version>2.0.5</version>
<executions>
<execution>
<id>process</id>
<goals>
<goal>process</goal>
</goals>
<phase>generate-sources</phase>
</execution>
</executions>
</plugin>
<!-- GWT Maven Plugin -->
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>gwt-maven-plugin</artifactId>
<version>2.4.0</version>
<dependencies>
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-user</artifactId>
<version>${gwtVersion}</version>
</dependency>
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-dev</artifactId>
<version>${gwtVersion}</version>
</dependency>
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-servlet</artifactId>
<version>${gwtVersion}</version>
</dependency>
</dependencies>
<!-- JS is only needed in the package phase, this speeds up testing -->
<executions>
<execution>
<phase>prepare-package</phase>
<goals>
<goal>compile</goal>
<goal>test</goal>
</goals>
</execution>
</executions>
<!-- Plugin configuration. There are many available options, see gwt-maven-plugin
documentation at codehaus.org -->
<!-- add gwt:18n and gwt:css configuration see -> http://mojo.codehaus.org/gwt-maven-plugin/i18n-mojo.html#i18nConstantsBundles -->
<configuration>
<extraJvmArgs>-javaagent:target/www/WEB-INF/lib/lombok-0.10.8.jar=ECJ -XX:MaxPermSize=384m -Xmx512m -Xss124m</extraJvmArgs>
<!-- URL that should be automatically opened in the GWT shell (gwt:run). -->
<runTarget>Register.html</runTarget>
<!-- Location of the develop-mode web application structure (gwt:run). -->
<hostedWebapp>target/www</hostedWebapp>
<!-- Ask GWT to create the Story of Your Compile (SOYC) (gwt:compile) -->
<compileReport>true</compileReport>
<module>eu.paedrtx.register.Register</module>
<logLevel>INFO</logLevel>
<style>${gwt.style}</style>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.2.1</version>
<executions>
<execution>
<id>my-execution</id>
<phase>prepare-package</phase>
<goals>
<goal>java</goal>
</goals>
</execution>
</executions>
<configuration>
<mainClass>eu.paedrtx.register.server.utility.Bootstrap</mainClass>
<classpathScope>test</classpathScope>
</configuration>
</plugin>
<!-- Add source folders to test classpath in order to run gwt-tests as
normal junit-tests -->
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.5</version>
<configuration>
<additionalClasspathElements>
<additionalClasspathElement>${project.build.sourceDirectory}</additionalClasspathElement>
<additionalClasspathElement>${project.build.testSourceDirectory}</additionalClasspathElement>
</additionalClasspathElements>
<useManifestOnlyJar>false</useManifestOnlyJar>
<forkMode>always</forkMode>
<!-- Folder for generated testing stuff -->
<systemProperties>
<property>
<name>gwt.args</name>
<value>-out ${project.build.directory}/${project.build.finalName}</value>
</property>
</systemProperties>
</configuration>
</plugin>
<!-- Copy static web files before executing gwt:run-->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>2.4.2</version>
<executions>
<execution>
<phase>compile</phase>
<goals>
<goal>copy-resources</goal>
</goals>
<configuration>
<outputDirectory>target/www</outputDirectory>
<resources>
<resource>
<directory>src/main/webapp</directory>
</resource>
</resources>
<encoding>UTF-8</encoding>
</configuration>
</execution>
</executions>
</plugin>
<!-- Delete gwt generated stuff -->
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>2.3</version>
<configuration>
<filesets>
<fileset><directory>src/main/webapp/register</directory></fileset>
<fileset><directory>src/main/webapp/WEB-INF/classes</directory></fileset>
<fileset><directory>tomcat</directory></fileset>
<fileset><directory>www-test</directory></fileset>
<fileset><directory>.gwt-tmp</directory></fileset>
</filesets>
</configuration>
</plugin>
<plugin>
<artifactId>maven-eclipse-plugin</artifactId>
<version>2.7</version> <!-- Note 2.8 does not work with AspectJ aspect path -->
<configuration>
<downloadSources>true</downloadSources>
<downloadJavadocs>false</downloadJavadocs>
<wtpversion>2.0</wtpversion>
<additionalBuildcommands>
<buildCommand>
<name>com.google.gwt.eclipse.core.gwtProjectValidator</name>
</buildCommand>
</additionalBuildcommands>
<additionalProjectnatures>
<projectnature>com.google.gwt.eclipse.core.gwtNature</projectnature>
</additionalProjectnatures>
</configuration>
</plugin>
</plugins>
</build>
stacktrace：
[INFO] --- exec-maven-plugin:1.2.1:java (default-cli) @ register ---
[WARNING]
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:297)
at java.lang.Thread.run(Thread.java:680)
Caused by: java.lang.IllegalArgumentException: Unknown entity: eu.paedrtx.register.server.domain.PaymentDetails
at org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:675)
at eu.paedrtx.register.server.repository.Repository.create(Repository.java:54)
at eu.paedrtx.register.server.utility.Bootstrap.main(Bootstrap.java:75)
... 6 more
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 6.299s
[INFO] Finished at: Wed Apr 04 13:04:14 CEST 2012
[INFO] Final Memory: 9M/81M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2.1:java (default-cli) on project register: An exception occured while executing the Java class. null: InvocationTargetException: Unknown entity: eu.paedrtx.register.server.domain.PaymentDetails -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2.1:java (default-cli) on project register: An exception occured while executing the Java class. null
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:217)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:319)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: org.apache.maven.plugin.MojoExecutionException: An exception occured while executing the Java class. null
at org.codehaus.mojo.exec.ExecJavaMojo.execute(ExecJavaMojo.java:352)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
... 19 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:297)
at java.lang.Thread.run(Thread.java:680)
Caused by: java.lang.IllegalArgumentException: Unknown entity: eu.paedrtx.register.server.domain.PaymentDetails
at org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:675)
at eu.paedrtx.register.server.repository.Repository.create(Repository.java:54)
at eu.paedrtx.register.server.utility.Bootstrap.main(Bootstrap.java:75)
... 6 more
答案 0 :(得分：0)
尝试使用exec目标而非java使用classpath参数，如此处所述http://mojo.codehaus.org/exec-maven-plugin/examples/example-exec-for-java-programs.html
这将分叉JVM并且可以解决许多问题，特别是对于像Hibernate这样的工具来做非平凡的类加载。这是因为Maven不必使用classloader magic在进程中提供正确的类路径（Maven是java进程本身，它以简单的类路径启动，仅包括maven bootstrap jar）。这样它就会填充-cp参数，并分叉新进程：简单易行的诊断。
答案 1 :(得分：0)
我解决了这个问题。 问题是我有2个persistence.xml用于测试/资源测试，另一个用于main / resources中的应用程序。我不得不删除测试/资源中的那个，并在应用程序persistence.xml中添加其他持久性单元。