问题
I just downloaded http://www.apache.org/dyn/closer.cgi/openejb/4.0.0-beta-1/apache-tomee-1.0.0-beta-1-webprofile.zip to use OpenEJB with OpenJPA2.1.1. I can't get my persistence.xml working.
The top of the stack trace:
org.xml.sax.SAXException: file:/D:/Workspaces/sandbox/tomcat_ejb_jpa2_tomEE/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/testEE/WEB-INF/classes/META-INF/persistence.xml [Location: Line: 2, C: 248]: org.xml.sax.SAXParseException: cvc-elt.1: Cannot find the declaration of element 'persistence'.
My 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="testEE">
</persistence-unit>
</persistence>
I've read, that the problem should be solved with the namespace declaration (xmlns="http://java.sun.com/xml/ns/persistence"
), but it still doesn't work.
回答1:
<?xml version="1.0"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
version="2.0">
<persistence-unit name="jpa-lib">
<provider>org.apache.openjpa.persistence.PersistenceProviderImpl
</provider>
<class>com.dav.jpa.entity.Employee</class>
<class>com.dav.jpa.entity.Department</class>
<properties>
<property name="openjpa.ConnectionURL" value="jdbc:oracle:thin:@localhost:1521:DVD" />
<property name="openjpa.ConnectionDriverName" value="oracle.jdbc.OracleDriver" />
<property name="openjpa.ConnectionUserName" value="scott" />
<property name="openjpa.ConnectionPassword" value="tiger" />
<property name="openjpa.Log" value="DefaultLevel=WARN, Tool=INFO" />
</properties>
</persistence-unit>
</persistence>
This is working for me..
回答2:
Does the problem disappear if you simplify your tag a bit?
<?xml version="1.0"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="2.0">
...
</persistence>
I just encountered the same problem and fixed it using above BUT preceding this I just had
<persistence version="2.0">
as indicated in the OpenJpa manual.
来源:https://stackoverflow.com/questions/8311963/openjpa-2-1-1-cannot-find-the-declaration-of-element-persistence