Errore plug-in Maven Jaxb2 xjc Nessun modello trovato

Question

In questi giorni ho trascorso un po 'di tempo su JAXB per convertire la classe XSD in Java e viceversa. Ecco un ottimo tutorial per principianti, http://www.journaldev.com/1312/how-to-generate-java-classes-from-xsd-using-xjc-maven-plugin. Seguo rigorosamente i passaggi, ma ottengo sempre errori quando mvn clean install

Ecco il mio file pom.xml.

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> 
    <modelVersion>4.0.0</modelVersion> 
    <groupId>jd</groupId> 
    <artifactId>jd</artifactId> 
    <version>0.0.1-SNAPSHOT</version> 

    <dependencies> 
     <dependency> 
      <groupId>junit</groupId> 
      <artifactId>junit</artifactId> 
      <version>3.8.1</version> 
      <scope>test</scope> 
     </dependency> 
    </dependencies> 


    <properties> 
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> 
    </properties> 


    <build> 
     <plugins> 
      <!-- Plugin required to build java classes from XSD using XJC --> 
      <plugin> 
       <groupId>org.codehaus.mojo</groupId> 
       <artifactId>jaxb2-maven-plugin</artifactId> 
       <version>1.5</version> 
       <executions> 
        <execution> 
         <id>xjc</id> 
         <goals> 
          <goal>xjc</goal> 
         </goals> 
        </execution> 
       </executions> 
       <configuration> 
        <!-- The name of your generated source package --> 
        <arguments>-extension -npa -b ${project.basedir}/src/main/java/com/moodys/jaxb/global.xjb</arguments> 
       </configuration> 
      </plugin> 

     </plugins> 
    </build> 

</project> 

Ma quando ho tipo mvn clean install, che mi danno sempre errore come segue:

C:\Users\congy\Desktop\Work\workspace\JaxbFromClass>mvn clean jaxb2:xjc 
[INFO] Scanning for projects... 
[INFO] 
[INFO] ------------------------------------------------------------------------ 
[INFO] Building jd 0.0.1-SNAPSHOT 
[INFO] ------------------------------------------------------------------------ 
[INFO] 
[INFO] --- maven-clean-plugin:2.4.1:clean (default-clean) @ jd --- 
[INFO] Deleting C:\Users\congy\Desktop\Work\workspace\JaxbFromClass\target 
[INFO] 
[INFO] --- jaxb2-maven-plugin:1.5:xjc (default-cli) @ jd --- 
[INFO] Generating source... 
[INFO] ------------------------------------------------------------------------ 
[INFO] BUILD FAILURE 
[INFO] ------------------------------------------------------------------------ 
[INFO] Total time: 0.487s 
[INFO] Finished at: Thu Jul 04 19:09:37 CST 2013 
[INFO] Final Memory: 4M/122M 
[INFO] ------------------------------------------------------------------------ 
[ERROR] Failed to execute goal org.codehaus.mojo:jaxb2-maven-plugin:1.5:xjc (default-cli) on project jd: No schemas have been found -> [Help 1] 
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. 
[ERROR] Re-run Maven using the -X switch to enable full debug logging. 
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles: 
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException 

Qualcuno mi può mostrare la causa o semplicemente dirmi cosa devo fare riferimento per ulteriori informazioni?

Un'altra domanda è: in base a questa domanda Difference of Maven JAXB plugins, ci sono almeno tre plugin jaxb. Quindi tutti questi plugin sono tutti generati per gli stessi scopi? Se è così, perché?

Grazie in anticipo!

Answer 1

Poiché non è stato fornito alcun schemaDirectory, il plug-in sta provando a generare origini Java da tutti i file di schema XML in the default schema directory. È necessario configurare il plugin secondo il documentation:

<plugin> 
    <groupId>org.codehaus.mojo</groupId> 
    <artifactId>jaxb2-maven-plugin</artifactId> 
    <version>1.5</version> 
    <executions> 
    <execution> 
     <id>id1</id> 
     <goals> 
    <goal>xjc</goal> 
     </goals> 
     <configuration> 
     <outputDirectory>target/generated-sources/jaxb</outputDirectory> 
     <packageName>com.your.package.jaxb</packageName> 
     <schemaDirectory>src/main/xsd</schemaDirectory> 
     <schemaFiles>jaxb.xsd</schemaFiles> 
     </configuration> 
    </execution> 
    </executions> 
</plugin> 

Answer 2

cercare di assicurarsi che jaxb.xsd è presente sotto src/main/risorse, il plugin è Waring poiché coudn't trovare lo schema nella posizione specificata.

Answer 3

Possiamo usare come di seguito nel file di pom.xml

<plugin> 
     <groupId>org.codehaus.mojo</groupId> 
     <artifactId>jaxb2-maven-plugin</artifactId> 
     <version>1.5</version> 
     <executions> 
      <execution> 
       <id>id1</id> 
       <goals> 
        <goal>xjc</goal> 
       </goals> 
       <configuration> 
        <outputDirectory>src/main/java</outputDirectory> 
        <clearOutputDir>false</clearOutputDir> 
        <packageName>com.subu.xsd.model</packageName> 
        <schemaDirectory>src/main/java/schemadir</schemaDirectory> 
        <schemaFiles>XYZ.xsd</schemaFiles> 
       </configuration> 
      </execution> 
     </executions> 
    </plugin>