在类路径中错误的产生，从默认的模板蚂蚁 [英] Error in classpath generation from default-template ant

问题描述

我试图使用默认的模板在我的Java项目生成启动脚本的基础上，在我的项目中指定的常春藤依赖关系。我现在面临的问题是常春藤的依赖越来越捞起，放在classpath中，但没有得到包括主体工程的jar在classpath中。（可提供试图运行脚本类未发现异常），在进一步的调查与其他脚本比较，我发现有一个行。

I am trying to use the default-template in my Java project to generate the launch script, based on the ivy dependencies specified in my project. The issue I am facing is that the ivy dependencies are getting picked up and put in the classpath but the main project jar is not getting included in the classpath.(Which gives a class not found exception while trying to run the script) On further investigation and comparison with other scripts I found that there is a line as.

export RUNTIME_CLASSPATH=""

在我生成的脚本。这应该具备的路径，我的项目罐子，但没有得到填充（例如：出口RUNTIME_CLASSPATH =$（目录名称$ 0）/../的lib / myproject.jar： ）

in my generated script. This should have the path to my projects jar but is not getting populated (ex: export RUNTIME_CLASSPATH="$(dirname $0)/../lib/myproject.jar:")

到底在哪我们指定项目在脚本本身指（主叫项目）？
我曾看着其他所有文件，包括生成属性，爬山虎，常春藤设置无济于事。
这将是巨大的，如果有人可以帮助我找到我丢失的东西。

Where exactly do we specify the project referring itself(calling project) in the script?? I have looked into all other files including the build properties, ivy, ivy settings to no avail. It would be great If someone could help me find what I am missing.

推荐答案

ANT没有产生具体的操作系统启动脚本的标准功能。你可以做的是产生一个可执行的JAR 可以通过运行java启动如下：

ANT doesn't have any standard functionality for generating OS specific launch scripts. What you can do is generate an executable jar which can be launched by running java as follows:

java -jar demo.jar

一个可执行的JAR的主要特点是它的明显的同时指定主类和类路径：

The key feature of an executable jar is it's manifest that specifies both the main class and classpath:

Manifest-Version: 1.0
Ant-Version: Apache Ant 1.8.3
Created-By: 1.6.0_20-b20 (Sun Microsystems Inc.)
Main-Class: org.demo.App
Class-Path: lib/slf4j-api-1.6.4.jar lib/slf4j-simple-1.6.4.jar

下面的ANT项目演示了如何常春藤能在创建可执行的jar文件

The following ANT project demonstrates how ivy can assist in the creation of executable jars

|-- build.xml
|-- ivy.xml
`-- src
    |-- main
    |   `-- java
    |       `-- org
    |           `-- demo
    |               `-- App.java
    `-- test
        `-- java
            `-- org
                `-- demo
                    `-- AppTest.java

运行构建

ant clean build

执行程序

java -jar build/dist/demo.jar

罐包装使用位于一个相对的LIB子目录依赖

jar is packaged to use dependencies located in a relative "lib" subdirectory

build/dist/demo.jar
build/dist/lib/slf4j-api-1.6.4.jar
build/dist/lib/slf4j-simple-1.6.4.jar

的ivy.xml

<ivy-module version="2.0">
    <info organisation="com.myspotontheweb" module="demo"/>

    <configurations>
        <conf name="compile" description="Required to compile application"/>
        <conf name="runtime" description="Additional run-time dependencies" extends="compile"/>
        <conf name="test"    description="Required for test only" extends="runtime"/>
    </configurations>

    <dependencies>
        <!-- compile dependencies -->
        <dependency org="org.slf4j" name="slf4j-api" rev="1.6.4" conf="compile->default"/>

        <!-- runtime dependencies -->
        <dependency org="org.slf4j" name="slf4j-simple" rev="1.6.4" conf="runtime->default"/>

        <!-- test dependencies -->
        <dependency org="junit" name="junit" rev="4.10" conf="test->default"/>
    </dependencies>

</ivy-module>

的build.xml

<project name="demo" default="build" xmlns:ivy="antlib:org.apache.ivy.ant">

    <!--
    ================
    Build properties
    ================
    -->
    <property name="src.dir"          location="src/main/java"/>
    <property name="test.src.dir"     location="src/test/java"/>
    <property name="build.dir"        location="build"/>
    <property name="classes.dir"      location="${build.dir}/classes"/>
    <property name="test.classes.dir" location="${build.dir}/test-classes"/>
    <property name="ivy.reports.dir"  location="${build.dir}/ivy-reports"/>
    <property name="test.reports.dir" location="${build.dir}/test-reports"/>
    <property name="dist.dir"         location="${build.dir}/dist"/>

    <property name="jar.main.class" value="org.demo.App"/>
    <property name="jar.file"       value="${dist.dir}/${ant.project.name}.jar"/>

    <!--
    ===========
    Build setup
    ===========
    -->
    <target name="init">
        <ivy:resolve/>

        <ivy:report todir='${ivy.reports.dir}' graph='false' xml='false'/>

        <ivy:cachepath pathid="compile.path" conf="compile"/>
        <ivy:cachepath pathid="runtime.path" conf="runtime"/>
        <ivy:cachepath pathid="test.path"    conf="test"/>
    </target>

    <!--
    ===============
    Compile targets
    ===============
    -->
    <target name="compile" depends="init">
        <mkdir dir="${classes.dir}"/>
        <javac srcdir="${src.dir}" destdir="${classes.dir}" includeantruntime="false" debug="true" classpathref="compile.path"/>
    </target>

    <target name="compile-tests" depends="compile">
        <mkdir dir="${test.classes.dir}"/>
        <javac srcdir="${test.src.dir}" destdir="${test.classes.dir}" includeantruntime="false" debug="true">
            <classpath>
                <path refid="test.path"/>
                <pathelement path="${classes.dir}"/>
            </classpath>
        </javac>
    </target>

    <!--
    ============
    Test targets
    ============
    -->
    <target name="test" depends="compile-tests">
        <mkdir dir="${test.reports.dir}"/>
        <junit printsummary="yes" haltonfailure="yes">
            <classpath>
                <path refid="test.path"/>
                <pathelement path="${classes.dir}"/>
                <pathelement path="${test.classes.dir}"/>
            </classpath>
            <formatter type="xml"/>
            <batchtest fork="yes" todir="${test.reports.dir}">
                <fileset dir="${test.src.dir}">
                    <include name="**/*Test*.java"/>
                    <exclude name="**/AllTests.java"/>
                </fileset>
            </batchtest>
        </junit>
    </target>

    <!--
    =====================
    Build and run targets
    =====================
    -->
    <target name="build" depends="test">
        <ivy:retrieve pattern="${dist.dir}/lib/[artifact]-[revision](-[classifier]).[ext]" conf="runtime"/>

        <manifestclasspath property="jar.classpath" jarfile="${jar.file}">
            <classpath>
                <fileset dir="${dist.dir}/lib" includes="*.jar"/>
            </classpath>
        </manifestclasspath>

        <jar destfile="${jar.file}" basedir="${classes.dir}">
            <manifest>
                <attribute name="Main-Class" value="${jar.main.class}" />
                <attribute name="Class-Path" value="${jar.classpath}" />
            </manifest>
        </jar>
    </target>

    <target name="run" depends="build">
        <java jar="${jar.file}" fork="true"/>
    </target>

    <!--
    =============
    Clean targets
    =============
    -->
    <target name="clean">
        <delete dir="${build.dir}"/>
    </target>

    <target name="clean-all" depends="clean">
        <ivy:cleancache/>
    </target>

</project>

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