J2EE中的JMS 消息服务
下面就java中的消息服务作如下学习总结：
java中的消息服务有两种分别是：Queen和Topic
步骤如下：无论是那种消息都需要先配置目标地址文件：message-service.xml
（*-service.xml）*表示你的命名后面必须一致
准备工作：
<1、导入*\jboss-4.2.3.GA-jdk6\jboss-4.2.3.GA\client
中的所有*.jar文件
<2、使用ANT来编译和发布EJB build.xml 内容如下：
<?xml version="1.0"?>

<!-- ======================================================================= -->
<!-- EJB3 HelloWorld build file                                                       -->
<!-- ======================================================================= -->

<project name="MessageDriverBean" default="ejbjar" basedir=".">

<property environment="env" />
<property name="app.dir" value="${basedir}" />
<property name="src.dir" value="${app.dir}\src" />
<property name="jboss.home" value="${env.JBOSS_HOME}" />
<property name="jboss.server.config" value="default" />
<property name="build.dir" value="${app.dir}\build" />
<property name="build.classes.dir" value="${build.dir}\classes" />

<!-- Build classpath -->
<path id="build.classpath">
<fileset dir="${jboss.home}\client">
<include name="*.jar" />
</fileset>
<pathelement location="${build.classes.dir}" />
</path>

<!-- =================================================================== -->
<!-- Prepares the build directory                                        -->
<!-- =================================================================== -->
<target name="prepare" depends="clean">
<mkdir dir="${build.dir}" />
<mkdir dir="${build.classes.dir}" />
</target>

<!-- =================================================================== -->
<!-- Compiles the source code                                            -->
<!-- =================================================================== -->
<target name="compile" depends="prepare" description="编绎">
<javac srcdir="${src.dir}" destdir="${build.classes.dir}" debug="on" deprecation="on" optimize="off" includes="com/**">
<classpath refid="build.classpath" />
</javac>
</target>

<target name="ejbjar" depends="compile" description="创建EJB发布包">
<jar jarfile="${app.dir}\HelloWorld.jar">
<fileset dir="${build.classes.dir}">
<include name="com/**/*.class" />
</fileset>
</jar>
</target>

<target name="deploy" depends="ejbjar">
<copy file="${app.dir}\HelloWorld.jar" todir="${jboss.home}\server\${jboss.server.config}\deploy" />
</target>

<!-- =================================================================== -->
<!-- Cleans up generated stuff                                        &nbs