如何讓Hibernate，JBoss和Eclipse在單元測試中一起工作？

Question

我最近開始研究相關的JBoss EAR，WAR和EJB項目（JBoss 7.7.1）。開發人員正在使用Eclipse進行開發，我們啓動JBoss並通過Eclipse進行調試。

我可以在Eclipse/JBoss中啓動我們的webapp，沒有任何問題。

鑑於我們根本沒有測試，我決定開始設置測試環境，最初只是爲了測試EJB項目。但是當嘗試啓動測試時，我在配置方面遇到很多困難（我已經查看了所有內容並看到了類似的問題，但對我來說沒有任何效果）。

這個項目的結構是這樣的：

ccc-ejb/ 
    src/ 
     ccc/ 
      <packages and classes under here> 
     META-INF/persistence.xml 
    test/ 
     ccc/ 
      <packages and classes under here> 
      TestDatabase.java 

只是爲了完整性（即使該文件仍然沒有被讀）我的persistence.xml文件看起來是這樣的：

<?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="ccc"> 
    <provider>org.hibernate.ejb.HibernatePersistence</provider> 
    <jta-data-source>java:jboss/datasource/ccc-ds</jta-data-source> 
    <class>ccc.User</class> 
    <properties> 
     <property name="hibernate.show_sql" value="true" /> 
     <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />  
     <property name="hibernate.hbm2ddl.auto" value="create"/> 
    </properties> 
</persistence-unit> 

作爲一個獲得測試環境設置的開始，我有以下測試課程，只是爲了理智檢查環境：

這種

public class TestDatabase { 
    public static void main(String[] args) { 
    try { 
     System.out.println(System.getProperty("java.class.path")); 
     System.out.println(System.class.getResource("META-INF/persistence.xml")); 
     System.out.println(Class.forName("org.hibernate.ejb.HibernatePersistence")); 

     EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory("ccc"); 
     EntityManager entityManager = entityManagerFactory.createEntityManager(); 

     entityManager.close(); 
     entityManagerFactory.close(); 
    } catch (Throwable t) { 
     System.out.println(t); 
    } 
    } 
} 

輸出是：

/usr/local/jboss-7.1.1-final/modules/org/hibernate/main/hibernate-entitymanager-4.0.1.Final.jar:/Development/workspace-ccc-dev/ccc-ejb/build/classes:/Development/workspace-ccc-dev/ccc-ejb/lib/json_simple-1.1.jar:/usr/local/jboss-7.1.1-final/modules/javax/activation/api/main/activation-1.1.1.jar:/usr/local/jboss-7.1.1-final/modules/javax/annotation/api/main/jboss-annotations-api_1.1_spec-1.0.0.Final.jar:/usr/local/jboss-7.1.1-final/modules/javax/ejb/api/main/jboss-ejb-api_3.1_spec-1.0.1.Final.jar:/usr/local/jboss-7.1.1-final/modules/javax/el/api/main/jboss-el-api_2.2_spec-1.0.0.Final.jar:/usr/local/jboss-7.1.1-final/modules/javax/enterprise/api/main/cdi-api-1.0-SP4.jar:/usr/local/jboss-7.1.1-final/modules/javax/enterprise/deploy/api/main/jboss-jad-api_1.2_spec-1.0.0.Final.jar:/usr/local/jboss-7.1.1-final/modules/javax/faces/api/main/jboss-jsf-api_2.1_spec-2.0.1.Final.jar:/usr/local/jboss-7.1.1-final/modules/javax/inject/api/main/javax.inject-1.jar:/usr/local/jboss-7.1.1-final/modules/javax/interceptor/api/main/jboss-interceptors-api_1.1_spec-1.0.0.Final.jar:/usr/local/jboss-7.1.1-final/modules/javax/jms/api/main/jboss-jms-api_1.1_spec-1.0.0.Final.jar:/usr/local/jboss-7.1.1-final/modules/javax/jws/api/main/jsr181-api-1.0-MR1.jar:/usr/local/jboss-7.1.1-final/modules/javax/mail/api/main/mail-1.4.4.jar:/usr/local/jboss-7.1.1-final/modules/javax/management/j2ee/api/main/jboss-j2eemgmt-api_1.1_spec-1.0.0.Final.jar:/usr/local/jboss-7.1.1-final/modules/javax/persistence/api/main/hibernate-jpa-2.0-api-1.0.1.Final.jar:/usr/local/jboss-7.1.1-final/modules/javax/resource/api/main/jboss-connector-api_1.6_spec-1.0.0.Final.jar:/usr/local/jboss-7.1.1-final/modules/javax/rmi/api/main/jboss-rmi-api_1.0_spec-1.0.4.Final.jar:/usr/local/jboss-7.1.1-final/modules/javax/security/auth/message/api/main/jboss-jaspi-api_1.0_spec-1.0.0.Final.jar:/usr/local/jboss-7.1.1-final/modules/javax/security/jacc/api/main/jboss-jacc-api_1.4_spec-1.0.1.Final.jar:/usr/local/jboss-7.1.1-final/modules/javax/servlet/api/main/jboss-servlet-api_3.0_spec-1.0.0.Final.jar:/usr/local/jboss-7.1.1-final/modules/javax/servlet/jsp/api/main/jboss-jsp-api_2.2_spec-1.0.0.Final.jar:/usr/local/jboss-7.1.1-final/modules/javax/servlet/jstl/api/main/jboss-jstl-api_1.2_spec-1.0.2.Final.jar:/usr/local/jboss-7.1.1-final/modules/javax/transaction/api/main/jboss-transaction-api_1.1_spec-1.0.0.Final.jar:/usr/local/jboss-7.1.1-final/modules/javax/validation/api/main/validation-api-1.0.0.GA.jar:/usr/local/jboss-7.1.1-final/modules/javax/ws/rs/api/main/jboss-jaxrs-api_1.1_spec-1.0.0.Final.jar:/usr/local/jboss-7.1.1-final/modules/javax/wsdl4j/api/main/wsdl4j-1.6.2.jar:/usr/local/jboss-7.1.1-final/modules/javax/xml/bind/api/main/jboss-jaxb-api_2.2_spec-1.0.3.Final.jar:/usr/local/jboss-7.1.1-final/modules/javax/xml/registry/api/main/jboss-jaxr-api_1.0_spec-1.0.1.Final.jar:/usr/local/jboss-7.1.1-final/modules/javax/xml/rpc/api/main/jboss-jaxrpc-api_1.1_spec-1.0.0.Final.jar:/usr/local/jboss-7.1.1-final/modules/javax/xml/soap/api/main/jboss-saaj-api_1.3_spec-1.0.1.Final.jar:/usr/local/jboss-7.1.1-final/modules/javax/xml/ws/api/main/jboss-jaxws-api_2.2_spec-2.0.0.Final.jar:/usr/local/jboss-7.1.1-final/modules/org/hibernate/validator/main/hibernate-validator-4.2.0.Final.jar:/usr/local/jboss-7.1.1-final/modules/org/picketbox/main/picketbox-4.0.7.Final.jar:/usr/local/jboss-7.1.1-final/modules/org/picketbox/main/picketbox-commons-1.0.0.final.jar:/usr/local/jboss-7.1.1-final/modules/org/picketbox/main/picketbox-infinispan-4.0.7.Final.jar:/usr/local/jboss-7.1.1-final/modules/org/jboss/as/controller-client/main/jboss-as-controller-client-7.1.1.Final.jar:/usr/local/jboss-7.1.1-final/modules/org/jboss/dmr/main/jboss-dmr-1.1.1.Final.jar:/usr/local/jboss-7.1.1-final/modules/org/jboss/logging/main/jboss-logging-3.1.0.GA.jar:/usr/local/jboss-7.1.1-final/modules/org/jboss/resteasy/resteasy-jaxb-provider/main/resteasy-jaxb-provider-2.3.2.Final-jandex.jar:/usr/local/jboss-7.1.1-final/modules/org/jboss/resteasy/resteasy-jaxb-provider/main/resteasy-jaxb-provider-2.3.2.Final.jar:/usr/local/jboss-7.1.1-final/modules/org/jboss/resteasy/resteasy-jaxrs/main/async-http-servlet-3.0-2.3.2.Final-jandex.jar:/usr/local/jboss-7.1.1-final/modules/org/jboss/resteasy/resteasy-jaxrs/main/async-http-servlet-3.0-2.3.2.Final.jar:/usr/local/jboss-7.1.1-final/modules/org/jboss/resteasy/resteasy-jaxrs/main/resteasy-jaxrs-2.3.2.Final-jandex.jar:/usr/local/jboss-7.1.1-final/modules/org/jboss/resteasy/resteasy-jaxrs/main/resteasy-jaxrs-2.3.2.Final.jar:/usr/local/jboss-7.1.1-final/modules/org/jboss/resteasy/resteasy-multipart-provider/main/resteasy-multipart-provider-2.3.2.Final-jandex.jar:/usr/local/jboss-7.1.1-final/modules/org/jboss/resteasy/resteasy-multipart-provider/main/resteasy-multipart-provider-2.3.2.Final.jar:/usr/local/jboss-7.1.1-final/modules/org/jboss/ejb3/main/jboss-ejb3-ext-api-2.0.0.jar 
null 
class org.hibernate.ejb.HibernatePersistence 
java.lang.NoClassDefFoundError: org/hibernate/proxy/EntityNotFoundDelegate 

問題：

1. 的，因爲，該項目是在Eclipse配置爲EJB項目，並自動有很多JBoss的罐子和JBoss模塊罐子放在構建路徑上（包括Hibernate罐子）。然而，hibernate-entitymanager-4.0.1.Final.jar不會自動添加，我需要自己添加它。如果我不手動添加它，那麼將不會找到org.hibernate.ejb.HibernatePersistence。好奇爲什麼這個jar不會像其他jar文件那樣自動包含？
2. persistence.xml資源的輸出爲空？它沒有被發現。我怎樣才能解決這個問題？

當Eclipse構建，它把所有的課在這裏：

/Development/workspace-ccc-dev/ccc-ejb/build/classes 

這個目錄肯定是從上面println的輸出類路徑。此外，在類目錄中，特別是我可以看到：

classes/ccc/TestDatabase.class 
classes/META-INF/persistence.xml 

爲什麼不拾取persistence.xml文件？

1. java.lang.NoClassDefFoundError：org/hibernate/proxy/EntityNotFoundDelegate也不好看。當我得到1和2固定時，我會做到這一點，但這裏的任何提示也將非常感激。

謝謝。

Answer 1

Why isn't the persistence.xml file being picked up?

因爲加載它的路徑是錯誤的。它應該是

System.class.getResource("/META-INF/persistence.xml") 

沒有前導斜槓，路徑被解釋爲相對於System類的包。使用前導斜槓，它從類路徑的根部開始。

關於其他問題，我不知道。但我不明白爲什麼應該「自動」添加到構建路徑。如果您需要構建路徑中的jar，請將其添加到構建路徑中。我不明白爲什麼這會是一個問題。