Error when using XmlBeans generated classes

问题

I've generated classes with XMLBeans from an xsd file and packed them in a jar file. then I've added that jar to the project classpath in eclipse and everything compiles and runs fine. I built a stand alone jar file from my project with Maven and again the build is successful, but when i try running it i get this error:

 Exception in thread "main" java.lang.ExceptionInInitializerError
    at com.oblicore.oblisync.resolutions.TestsDocument$Factory.parse(TestsDo
cument.java:126)
    at com.oblicore.oblisync.handlers.TransferEntitiesHandler.getResolution(
TransferEntitiesHandler.java:117)
    at com.oblicore.oblisync.handlers.TransferEntitiesHandler.resolveConflic
ts(TransferEntitiesHandler.java:103)
    at com.oblicore.oblisync.main.Orchestrator.run(Orchestrator.java:107)
    at com.oblicore.oblisync.main.Orchestrator.main(Orchestrator.java:58)
Caused by: java.lang.RuntimeException: Cannot load SchemaTypeSystem. Unable to l
oad class with name schemaorg_apache_xmlbeans.system.s8B21CFFFCFED0B2438C2585C61
F113F7.TypeSystemHolder. Make sure the generated binary files are on the classpa
th.
    at org.apache.xmlbeans.XmlBeans.typeSystemForClassLoader(XmlBeans.java:7
83)
    at com.oblicore.oblisync.resolutions.TestsDocument.<clinit>(TestsDocumen
t.java:19)
    ... 5 more
Caused by: java.lang.ClassNotFoundException: schemaorg_apache_xmlbeans.system.s8
B21CFFFCFED0B2438C2585C61F113F7.TypeSystemHolder
    at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:303)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
    at org.apache.xmlbeans.XmlBeans.typeSystemForClassLoader(XmlBeans.java:7
69)
    ... 6 more

The missing class is in the jar i created with XmlBeans, how do i tell maven to add it to the jar it creates from my project?

回答1:

In your generated jar file make sure you have included the class files generated from your xmlbeans.

From the stacktrace :

Caused by: java.lang.ClassNotFoundException: schemaorg_apache_xmlbeans.system.s8
B21CFFFCFED0B2438C2585C61F113F7.TypeSystemHolder

it suggests that during compile time the required class files are in classpath but in your built jar these files are missing.

Check your jar file to see if these classes are present.

EDIT: As per question rephrased

For building jar with dependecies in Maven use jar-with-dependencies option, example

Two very good reference :

http://www.sonatype.com/books/mvnref-book/reference/assemblies-sect-basics.html
http://thomassundberg.wordpress.com/2011/03/05/create-an-executable-jar-from-maven/

In the second one you don't need a main class if your jar is not an executable jar

回答2:

While doing WSDL2Java a directory named resources will be created. Copy the schemaorg_apache_xmlbeans which presents under resources to classpath of your project. This should be the fix.

回答3:

When you have this kind of error The TypeSystemHolder.class generated by WSDL2Java is not be placed in your classpath in order to avoid this error.

Please copy TypeSystemHolder.class from "resource/schemaorg_apache_xmlbeans/system/s68C41DB812F52C975439BA10FE4FEE54" folder.

And Paste TypeSystemHolder.class file into your classpath folder (build/classes/schemaorg_apache_xmlbeans/system/s68C41DB812F52C975439BA10FE4FEE54) folder

回答4:

Please add below tag in pom.xml. Error wil go

        <!--
            this tells maven to copy the openejb-javaagent jar into your target/
            directory
        -->
        <!-- where surefire can see it -->
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-dependency-plugin</artifactId>
            <version>2.1</version>
            <executions>
                <execution>
                    <id>copy</id>
                    <phase>process-resources</phase>
                    <goals>
                        <goal>copy</goal>
                    </goals>
                    <configuration>
                        <artifactItems>
                            <artifactItem>
                                <groupId>org.apache.openejb</groupId>
                                <artifactId>openejb-javaagent</artifactId>
                                <version>3.0-beta-2</version>
                                <outputDirectory>${project.build.directory}</outputDirectory>
                            </artifactItem>
                        </artifactItems>
                    </configuration>
                </execution>
            </executions>
        </plugin>
    </plugins>
    <resources>
        <resource>
            <directory>target/generated-sources/axis2/wsdl2code/resources</directory>
        </resource>
        <resource>
            <directory>target/generated-sources/xmlbeans/resources</directory>
        </resource>
        <resource>
            <directory>src/main/resources</directory>
        </resource>
    </resources>
</build>

回答5:

Extract jar in which you want to include schemaorg_apache_xmlbeans folder. Copy schemaorg_apache_xmlbeans folder in extracted folder (result from jar extraction). open command prompt in extracted folder.

make jar again using jar cf command. e.g jar cf test.jar *, to include all folders.

Deploy that jar .

来源：https://stackoverflow.com/questions/8518301/error-when-using-xmlbeans-generated-classes

标签

java

maven

xmlbeans