问题描述
我有一个可以正常工作的 build.xml 文件.问题是生成的jar文件,我需要在没有'ant run'的情况下运行它
I have a build.xml file that works fine.The problem is that the generated jar file, and I need to run it without 'ant run'
如何运行 jar 文件?运行
How can I run the jar file?running with
java -jar Main.jar main.Main
给我:
Exception in thread "main" java.lang.NoClassDefFoundError: org/neo4j/graphdb/GraphDatabaseService
这是我创建 jar 文件 (build.xml) 的方式:
This is how I'm creating the jar file (build.xml):
<target name="jar" depends="compile">
<mkdir dir="${jar.dir}"/>
<jar destfile= "${jar.dir}/${ant.project.name}.jar" basedir="${build.dir}">
<manifest>
<attribute name="Main-Class" value="${main-class}"/>
</manifest>
</jar>
</target>
<target name="compile">
<mkdir dir="${build.dir}"/>
<mkdir dir="${build.dir}/${conf.dir}"/>
<javac srcdir="${src.dir}" destdir="${build.dir}" classpathref="classpath" includeantruntime="false"/>
<copy todir="${build.dir}/${conf.dir}">
<fileset dir="${conf.dir}"/>
</copy>
</target>
<target name="run" >
<java fork="true" classname="${main-class}">
<classpath>
<path refid="classpath"/>
<path location="${jar.dir}/${ant.project.name}.jar"/>
</classpath>
</java>
</target>
<path id="classpath">
<fileset dir="${lib.dir}" includes="**/*.jar"/>
</path>
ant run"任务在这个 jar 中运行良好.我如何在没有蚂蚁的情况下运行这个项目?
The "ant run" task works fine with this jar.How can I run this project without ant?
推荐答案
使用 java -cp Main.jar main.Main
,-jar
用于捆绑的 jars清单说明将哪个类用作主类.您对 -cp
(以及在您的 ant 构建文件中)所做的只是将它放在主路径上:您将 main.Main
指定为主类明确地,不在清单中.
Use java -cp Main.jar main.Main
, -jar
is for bundled jars with a Manifest saying which class is to be used as the main class. What you're doing with -cp
(and within your ant build file) is just putting it on the main path: you're specifying main.Main
as the main class explicitly, not within a manifest.
您还应该将其他 jar 放在类路径上(例如 -cp lib/example1.jar:lib/example2.jar:Main.jar
).根据与 **/*.jar
匹配的内容,可能有很多.
You should also put the other jars on the classpath (e.g. -cp lib/example1.jar:lib/example2.jar:Main.jar
). Depending on what matches **/*.jar
, there may be a number of them.
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