因此，我可以再次向我的愚蠢致敬. 除了在module.xml文件中有错别字外，我所做的一切都没错. 请注意，在上面的代码中，某些单词之间没有空格(")-不知何故它们迷路了. 但是更糟糕的是，显然这些模块文件没有被jboss验证，这就是为什么我从未意识到这一点.无论如何，这里是没有错别字的正确配置...

So once more I can pay tribute to my stupidity. I did everything right except I had typos in my module.xml file. Notice that in the code above are no blanks (" ") between some words - somehow they got lost. But what's even worse is that apparantly these module-files are not validated by jboss, that's why I never realized it. Anyway here's the correct config without the typos...

<?xml version="1.0" encoding="UTF-8"?>
<module xmlns="urn:jboss:module:1.0" name="com.mysql">
  <resources>
     <resource-root path="mysql-connector-java-5.1.26-bin.jar"/>              
  </resources>
  <dependencies>
     <module name="javax.api"/>
  </dependencies>
</module>