JAVA_HOME 
或服务配置路径问题         <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" />
看看 和你的 路径 对不对下面的提示信息 会告诉你的uildfile: C:\Documents and Settings\Administrator\workspace\myEJB2\build_entity.xml
clean:
   [delete] Deleting directory C:\Documents and Settings\Administrator\workspace\myEJB2\build
   [delete] Deleting: D:\jboss-4.2.1.GA\server\default\deploy\entityBean.jar
prepare:
    [mkdir] Created dir: C:\Documents and Settings\Administrator\workspace\myEJB2\build
    [mkdir] Created dir: C:\Documents and Settings\Administrator\workspace\myEJB2\build\classes
compile:
    [javac] Compiling 9 source files to C:\Documents and Settings\Administrator\workspace\myEJB2\build\classes
    [javac] Note: C:\Documents and Settings\Administrator\workspace\myEJB2\src\com\icss\shoppingcart\ShoppingCartBean.java uses unchecked or unsafe operations.
    [javac] Note: Recompile with -Xlint:unchecked for details.
ejbjar:
      [jar] Building jar: C:\Documents and Settings\Administrator\workspace\myEJB2\EntityBean.jar
deploy:
     [copy] Copying 1 file to D:\jboss-4.2.1.GA\server\default\deploy
BUILD SUCCESSFUL
Total time: 10 seconds这是成功的提示