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我完成了本教程中编写的所有步骤，但是当我在 Jboss 上部署应用程序时，出现了这些错误

17:31:05,744 INFO [org.jboss.as.server.deployment]（MSC 服务线程 1-7）JBAS015876：开始部署“JPAEJBProject.jar” 17:31:05,754 INFO [org.jboss.as.jpa] （MSC 服务线程 1-7）JBAS011401：读取 JPADB 的 persistence.xml 17:31:05,764 INFO [org.jboss.as.ejb3.deployment.processors.EjbJndiBindingsDeploymentUnitProcessor]（MSC 服务线程 1-7）会话 bean 的 JNDI 绑定在部署单元部署“JPAEJBProject.jar”中命名为 ProjectBean 如下：

java:global/JPAEJBProject/ProjectBean!com.ibytecode.business.IProject java:app/JPAEJBProject/ProjectBean!com.ibytecode.business.IProject java:module/ProjectBean!com.ibytecode.business.IProject java:jboss/exported/JPAEJBProject /ProjectBean!com.ibytecode.business.IProject java:global/JPAEJBProject/ProjectBean java:app/JPAEJBProject/ProjectBean java:module/ProjectBean

17:31:06,076 INFO [org.jboss.as.server]（DeploymentScanner-threads - 2）JBAS015870：部署“JPAEJBProject.jar”的部署已回滚并显示失败消息 {“JBAS014771：缺少/不可用依赖项的服务”= > ["jboss.persistenceunit.\"JPAEJBProject.jar#JPADB\"jboss.naming.context.java.MySQLDSMissing[jboss.persistenceunit.\"JPAEJBProject.jar#JPADB\"jboss.naming.context.java.MySQLDS]" ]}

这是我的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="JPADB">
    <jta-data-source>java:/MySQLDS</jta-data-source>
        <properties>
            <property name="showSql" value="true"/>
            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
        </properties>
    </persistence-unit>
</persistence>

我在 zmodules\com\mysql\main 中创建了一个 module.xml，内容如下：

<?xml version="1.0" encoding="UTF-8"?>

<module xmlns="urn:jboss:module:1.0" name="com.mysql">
  <resources>
    <resource-root path="mysql-connector-java-5.1.25-bin.jar"/>
  </resources>
  <dependencies>
    <module name="javax.api"/>
  </dependencies>
</module>

我还在 zmodules\com\mysql\main 中粘贴了“mysql-connector-java-5.1.25-bin”并修改了“stanalone.xml”以添加数据源和驱动程序，如图所示：

<subsystem xmlns="urn:jboss:domain:datasources:1.0">
    <datasources>
        <datasource jndi-name="java:jboss/datasources/ExampleDS" pool-name="ExampleDS" enabled="true" use-java-context="true">
            <connection-url>jdbc:h2:mem:test;DB_CLOSE_DELAY=-1</connection-url>
            <driver>h2</driver>
            <security>
                <user-name>sa</user-name>
                <password>sa</password>
            </security>
        </datasource>
        <datasource jndi-name="java:/MySQLDS"
            pool-name="MySQLDS" jta="true" enabled="true" use-java-context="true">
            <connection-url>jdbc:mysql://localhost:3306/ejbexample</connection-url>
            <driver>mysqlDriver</driver>
            <security>
                <user-name>root</user-name>
                <password>root</password>
            </security>
        </datasource>               
        <drivers>
            <driver name="h2" module="com.h2database.h2">
                <xa-datasource-class>org.h2.jdbcx.JdbcDataSource</xa-datasource-class>
            </driver>
            <driver name="mysqlDriver" module="com.mysql">
                <xa-datasource-class>com.mysql.jdbc.Driver</xa-datasource-class>
            </driver>                   
        </drivers>
    </datasources>
</subsystem>

有人能帮我吗？

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