jboss类的加载顺序：１）系统包２）jboss-deployment-structure.xml或者Dependencies:manifest entry for modules 或者throughClass-Path:for jar files.　３）本地包WEB-INF/classes和WEB-INF/lib下的内容　４）内部依赖类：如ear的子包相互依赖

应用程序模块加载的命名约定：deployment.myarchive.war，deployment.myear.ear.mywar.war.不多解释，观察下特征．

系统包依赖自动加载．注意一个包在应用程序中和jboss系统中都有的情况下，优先使用了host.xml中配置的子系统的依赖包．当腰改变这种和系统包之间的依赖性，可以配置jboss-deployment-structure.xml文件

EAR包中所有子系统的类和包可以设置为共享和独占。但是可以在host.xml中配置独占，默认视共享，即可以从其它子项目加载类：

<subsystemxmlns="urn:jboss:domain:ee:1.0">

<ear-subdeployments-isolated>false</ear-subdeployments-isolated>

</subsystem>

war中的lib和class文件在jboss中是同等对待的

jboss-deployment-structure.xml的作用，放在顶级应用中包添加或者删除依赖性。文件方放在Meta-INF(或者WEB-INF)中.

jboss-deployment-structure.xml
<jboss-deployment-structurexmlns="urn:jboss:deployment-structure:1.2">
<!--Makesubdeploymentsisolatedbydefault,sotheycannotseeeachothersclasseswithoutaClass-Pathentry设置ear的子应用的包不依赖-->
<ear-subdeployments-isolated>true</ear-subdeployments-isolated>
<!--Thiscorrespondstothetopleveldeployment.Forawarthisisthewar'smodule,foranear-->
<!--Thisisthetoplevelearmodule,whichcontainsalltheclassesintheEAR'slibfolder-->
<deployment>
<!--exclude-subsystempreventsasubsystemsdeploymentunitprocessorsrunningonadeployment设置不加载服务器配置文件中的子应用-->
<!--whichgivesbasicallythesameeffectasremovingthesubsystem,butitonlyaffectssingledeployment-->
<exclude-subsystems>
<subsystemname="resteasy"/>
</exclude-subsystems>
<!--Exclusionsallowyoutopreventtheserverfromautomaticallyaddingsomedependencies禁止服务器自动添加某些依赖-->
<exclusions>
<modulename="org.javassist"/>
</exclusions>
<!--Thisallowsyoutodefineadditionaldependencies,itisthesameasusingtheDependencies:manifestattribute添加依赖-->
<dependencies>
<modulename="deployment.javassist.proxy"/>
<modulename="deployment.myjavassist"/>
<!--ImportMeta-INF/servicesforServiceLoaderimplsaswell-->
<modulename="myservicemodule"services="import"/>
</dependencies>
<!--Theseaddadditionalclassestothemodule.InthiscaseitisthesameasincludingthejarintheEAR'slibdirectory可以添加一些格外的包-->
<resources>
<resource-rootpath="my-library.jar"/>
</resources>
</deployment>
<sub-deploymentname="myapp.war">
<!--Thiscorrespondstothemoduleforawebdeployment-->
<!--itcanuseallthesaMetagsasthe<deployment>entryabove-->
<dependencies>
<!--Addsadependencyonaejbjar.ThiscouldalsobedonewithaClass-Pathentry-->
<modulename="deployment.myear.ear.myejbjar.jar"/>
</dependencies>
<!--Set'slocalresourcestohavethelowestpriority-->
<!--Ifthesameclassisbothinthesubdeploymentandinanothersubdeploymentthat-->
<!--isvisibletothewar,thentheClassfromtheotherdeploymentwillbeloaded,-->
<!--ratherthantheclassactuallypackagedinthewar.-->
<!--ThiscanbeusedtoresolveClassCastExceptionsifthesameclassisinmultiplesubdeployments设置本地包加载优先级最后-->
<local-lastvalue="true"/>
</sub-deployment>
<!--Nowwearegoingtodefinetwoadditionalmodules-->
<!--Thisoneisadifferentversionofjavassistthatwehavepackaged-->
<modulename="deployment.myjavassist">
<resources>
<resource-rootpath="javassist.jar">
<!--Wewanttousetheserversversionofjavassist.util.proxy.*sowefilteritout-->
<filter>
<excludepath="javassist/util/proxy"/>
</filter>
</resource-root>
</resources>
</module>
<!--Thisisamodulethatre-exportsthecontainersversionofjavassist.util.proxy-->
<!--ThismeansthatthereisonlyoneversionoftheProxyclassesdefined-->
<modulename="deployment.javassist.proxy">
<dependencies>
<modulename="org.javassist">
<imports>
<includepath="javassist/util/proxy"/>
<excludepath="/**"/>
</imports>
</module>
</dependencies>
</module>
</jboss-deployment-structure>

在<subsystemxmlns="urn:jboss:domain:ee:1.0"> 可以设置全局依赖性：

<subsystem xmlns="urn:jboss:domain:ee:1.0">

<global-modules>

<modulename="org.javassist"slot="main"/>

</global-modules>

</subsystem>