2

I'm new to this forum and also new to JPA / EJB.

I'm trying to deploy a .war file containing a small application to a tomcat server. The application is using JTA to communicate with the Derby db.

When I run and deploy the application from and eclipse top the tomcat server running in eclipse, everything works perfect, but when I export a .war file and try to browse the application it throws an java.lang.ClassNotFoundException: javax.persistence.PersistenceException.

My persistence file looks like this:

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

<persistence xmlns="http://java.sun.com/xml/ns/persistence"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    version="1.0">

    <persistence-unit name="lab1" transaction-type="RESOURCE_LOCAL">
        <provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
        <!--<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>-->
        <class>entity.Team</class>
        <class>entity.Gambler</class>
        <class>entity.Bet</class>
        <class>entity.Game</class>
        <class>entity.Gameday</class>
          <properties>
       <property name="openjpa.ConnectionURL" value="jdbc:derby://localhost:1527/hean0901;create=true"/>
            <property name="openjpa.ConnectionDriverName" value="org.apache.derby.jdbc.ClientDriver"/>
            <property name="openjpa.ConnectionUserName"  value="lab1"/>
            <property name="openjpa.ConnectionPassword" value="user"/>
            <property name="lab1.log" value="DefaultLevel=TRACE"/>
            <property name="nonTransactionalDataSource" value="true"/> 
            <!-- <property name="openjpa.RuntimeUnenhancedClasses" value="supported"/>-->
            <property name="openjpa.jdbc.SynchronizeMappings" value="buildSchema" />
            <property name="eclipselink.logging.level" value="FINEST"/> 
        </properties>
    </persistence-unit>

</persistence>

and the error thrown looks like this:

org.apache.jasper.JasperException: An exception occurred processing JSP page /index.jsp at line 1

1: <jsp:forward page="Setupcheck.do" />


Stacktrace:
 org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
 org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:401)
 org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
 org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
root cause

javax.servlet.ServletException: Servlet execution threw an exception
 org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:706)
 org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:677)
 org.apache.jsp.index_jsp._jspService(index_jsp.java:54)
 org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
 org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
 org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
root cause

java.lang.NoClassDefFoundError: javax/persistence/PersistenceException
 model.Setupcheck.processRequest(Setupcheck.java:31)
 model.Setupcheck.doGet(Setupcheck.java:43)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:706)
 org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:677)
 org.apache.jsp.index_jsp._jspService(index_jsp.java:54)
 org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
 org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
 org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
root cause

java.lang.ClassNotFoundException: javax.persistence.PersistenceException
 org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1645)
 org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1491)
 model.Setupcheck.processRequest(Setupcheck.java:31)
 model.Setupcheck.doGet(Setupcheck.java:43)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:706)
 org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:677)
 org.apache.jsp.index_jsp._jspService(index_jsp.java:54)
 org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
 org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
 org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

Has anyone encountered this before?

Best regards Henrik

4

2 回答 2

7

您似乎缺少 javax.persistence.PersistenceException 类（JPA 规范的一部分）。

Java Persistence API JAR（包含 PersistenceException 类）可以在这里找到：

http://repo1.maven.org/maven2/javax/persistence/persistence-api/1.0/persistence-api-1.0.jar

此 JAR 需要位于您的 WEB-INF/lib 文件夹中。

根据您设置 Eclipse 的方式，它可能会自动将这些 JAR 推送到 Tomcat（通过定义库）。

但是，它尝试加载 PersistenceException 的事实很可能意味着一旦您解决了这个 ClassNotFoundException，就会发生另一个异常（真正的异常）。

于 2010-12-27T21:27:19.423 回答
0

如果您使用 Maven 来管理项目依赖项，那么在我pom.xml为我工作的内容中包括以下内容：

<!-- https://mvnrepository.com/artifact/javax.persistence/persistence-api -->
<dependency>
    <groupId>javax.persistence</groupId>
    <artifactId>persistence-api</artifactId>
    <version>1.0.2</version>
</dependency>
于 2016-08-28T11:54:16.670 回答