java build ant文件与外部jar文件

Question

我创建了一个ant构建文件来将我的java src编译成.jar文件.它使用外部jar文件.

我的文件目录:

+src
----android
------------Address.java
------------HelloServer.java
------------HelloServerResource.java
+lib
------------org.codehaus.jackson.core.jar
------------org.codehaus.jackson.mapper.jar
------------org.json.jar
------------org.restlet.ext.jackson.jar
------------org.restlet.jar
build.xml

外部库位于lib文件夹中.主类在HelloServer.java中

这是我的ant构建文件:

<project name="helloworld">
    <property name="src-dir" location="src"/>
    <property name="build-dir" location="build"/>
    <property name="classes-dir" value="${build-dir}/classes"/>
    <property name="dist-dir" location="dist"/>
    <property name="lib-dir" value="lib"/>
    <property name="jar-dir"     value="${build-dir}/jar"/>
    <property name="main-class"  value="android.HelloServer"/>

    <path id="classpath">
        <fileset dir="${lib-dir}" includes="**/*.jar"/>
    </path>

    <target name="clean" description="compile the source">
        <delete dir="${build-dir}" />
        <delete dir="${dist-dir}" />
    </target>

    <target name="cleanall" depends="clean"/>

    <target name="init">
        <!-- Create the build directory structure used by compile -->
        <mkdir dir="${build-dir}"/>
        <mkdir dir="${classes-dir}"/>
        <mkdir dir="${jar-dir}"/>
        <!--<mkdir dir="${dist-dir}"/>-->
    </target>

    <target name="compile" depends="init" description="compile the source " >
        <javac srcdir="${src-dir}" destdir="${classes-dir}" classpathref="classpath" includeantruntime="false" />
        <!--<javac srcdir="${src-dir}" destdir="${build-dir}"/>-->
    </target>

    <target name="jar" depends="compile">
        <jar destfile="${jar-dir}/${ant.project.name}.jar" basedir="${classes-dir}">
            <manifest>
                <attribute name="Main-Class" value="${main-class}"/>
            </manifest>
        </jar>
    </target>

    <target name="run" depends="jar">
        <java fork="true" classname="${main-class}">
            <classpath>
                <path refid="classpath"/>
                <path location="${jar-dir}/${ant.project.name}.jar"/>
            </classpath>
        </java>
    </target>

</project>

我执行run并且所有dirs都已成功创建,.jar文件已创建并且能够执行.

我打开终端然后去了jar目录.我尝试通过这样的命令行执行,它给了我以下错误:

$java -jar helloworld.jar
Exception in thread "main" java.lang.NoClassDefFoundError: org/restlet/Server
    at android.HelloServer.main(Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.restlet.Server
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    ... 1 more

为什么说找不到类文件？我想通过创建helloworld jar文件,我实际上包括了外部库.

Answer 1

您需要使用zipgroupfileset以下方法将所有罐子组合在一起:

<target name="jar" depends="compile">
    <jar destfile="${jar-dir}/${ant.project.name}.jar" basedir="${classes-dir}">
        <manifest>
            <attribute name="Main-Class" value="${main-class}"/>
        </manifest>
        <zipgroupfileset dir="${lib-dir}" includes="*.jar"/>
    </jar>
</target>

请参阅:使用ant创建一个bundle jar