如何使用ant从pom.xml编译jar？

Question

我使用Maven进行项目配置，并使用Ant来为某些实用程序类创建jar。当我从build.xml为类创建jar时，出现编译错误，因为某些第三方jar是使用maven配置的，而这些jar在我的项目中不存在。如果可以，该如何解决？我需要从build.xml编译pom.xml吗？还是可以从Maven创建jar文件？有什么建议么 ？

Answer 1

现在，我已经完全使用Maven ant Task。现在，我可以从ant build.xml中获取所有依赖项jar。我可以通过以下两种方式获得它们。

1.将所有jar文件复制到特定位置，并将其添加到classpath中

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<project name="Ant-Test" default="main" basedir="." xmlns:artifact="antlib:org.apache.maven.artifact.ant">
<path id="maven-ant-tasks.classpath" path="libs/maven-ant-tasks-2.1.3.jar" />
<typedef resource="org/apache/maven/artifact/ant/antlib.xml"
           uri="antlib:org.apache.maven.artifact.ant"
           classpathref="maven-ant-tasks.classpath" />

<artifact:pom id="mypom" file="pom.xml" />

<artifact:dependencies filesetId="mydeps" pomRefId="mypom" />

<target name="resolve" description="--> retrieve dependencies with maven">
    <!-- Resolve dependencies -->
    <artifact:dependencies filesetId="dependency.fileset">
        <pom file="pom.xml" />
    </artifact:dependencies>
    <!-- Copy all dependencies to the correct location. -->
    <copy todir="libs">
        <fileset refid="dependency.fileset" />
        <!-- This mapper strips off all leading directory information -->
        <mapper type="flatten" />
    </copy>
</target>

<property file="build.properties"/>

<path id="build.classpath">
    <fileset dir = ".">
        <include name="**/*.jar" />
    </fileset>
</path>

<target name="clean">
    <delete dir="${build.dir}" />
    <delete dir="${docs.dir}" />
    <delete dir="${dist.dir}" />
</target>

<target name="makedir">
    <mkdir dir="${build.dir}" />
    <mkdir dir="${docs.dir}" />
    <mkdir dir="${dist.dir}" />
</target>

<target name="compile" depends="clean, makedir">
    <javac includeantruntime="false" srcdir="${src.dir}" destdir="${build.dir}" classpathref="build.classpath">
        <compilerarg value="-Xlint:unchecked"/>
    </javac>
</target>

<target name="main" depends="resolve , compile">
    <description>Main target</description>
</target>

2.加载pom.xml并将其作为文件集引用

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<project name="Ant-Test" default="main" basedir="." xmlns:artifact="antlib:org.apache.maven.artifact.ant">

<path id="maven-ant-tasks.classpath" path="libs/maven-ant-tasks-2.1.3.jar" />
<typedef resource="org/apache/maven/artifact/ant/antlib.xml"
           uri="antlib:org.apache.maven.artifact.ant"
           classpathref="maven-ant-tasks.classpath" />
<property file="build.properties"/>

<!-- Load pom.xml for dependencies -->
<artifact:pom id="pomfile" file="pom.xml" />
<artifact:dependencies filesetId="mvn-dependencies" pomRefId="pomfile" />

<path id="build.classpath">
    <fileset refid="mvn-dependencies" />
</path>

<target name="clean">
    <delete dir="${build.dir}" />
    <delete dir="${docs.dir}" />
    <delete dir="${dist.dir}" />
</target>

<target name="makedir">
    <mkdir dir="${build.dir}" />
    <mkdir dir="${docs.dir}" />
    <mkdir dir="${dist.dir}" />
</target>

<target name="compile" depends="clean, makedir">
    <javac includeantruntime="false" srcdir="${src.dir}" destdir="${build.dir}" classpathref="build.classpath">
        <compilerarg value="-Xlint:unchecked"/>
    </javac>
</target>


<target name="main" depends="compile">
    <description>Main target</description>
    <echo> Finish Building for project - ${projectName}</echo>
</target>