Ant将多个jar打包为一个jar

Ant中的build.xml主要标签如下：

(1)<mkdir>创建文件夹

(2)<copy>拷贝文件
(3)<javac> 编译java文件     
(4)<jar>打包class文件

(5)<unzip>解压缩jar包

具体用法网上有很多，不过有一用法很值得一提，就是将多个jar包打成一个大的jar包，代码如下：

 <target name="jar" depends="compile">
    <echo message="Jar: ${name}"/>
 <unzip src="${hive.root}/lib/commons-logging-1.0.4.jar" dest="${build.dir.hive}/commons-logging/classes">
       <patternset>
       <exclude name="META-INF"/>
       <exclude name="META-INF/MANIFEST.MF"/>
       </patternset>
 </unzip>
 <unzip src="${hive.root}/lib/libfb303.jar" dest="${build.dir.hive}/fb303/classes">
        <patternset>
        <exclude name="META-INF"/>
        <exclude name="META-INF/MANIFEST.MF"/>
        </patternset>
 </unzip>
 <unzip src="${hive.root}/lib/log4j-1.2.15.jar" dest="${build.dir.hive}/log4j/classes">
           <patternset>
           <exclude name="META-INF"/>
           <exclude name="META-INF/MANIFEST.MF"/>
           </patternset>
 </unzip>
 <unzip src="${build.dir.hive}/hadoopcore/hadoop-0.20.1/hadoop-0.20.1-core.jar" dest="${build.dir.hive}/hadoop/classes">
              <patternset>
              <exclude name="META-INF"/>
              <exclude name="META-INF/MANIFEST.MF"/>
              </patternset>
 </unzip>

 <!-- jar jarfile="${build.dir}/hive_${name}.jar" basedir="${build.classes}" / -->
 <jar jarfile="${hive.root}/hugetable_jdbc_driver.jar">
     <fileset dir="${build.dir.hive}/commons-logging/classes" includes="**/*.class"/>
     <fileset dir="${build.dir.hive}/fb303/classes" includes="**/*.class"/>
     <fileset dir="${build.dir.hive}/log4j/classes" includes="**/*.class"/>
     <fileset dir="${build.dir.hive}/hadoop/classes" includes="**/*.class"/>
 </jar>
 </target>