Runnable JAR文件导出

Question

I have a java project . I want to export it to runnable jar file.

I use eclipse to do it.

But when i run created jar file i receive Error ~ file not found : config\\file.xml (the system cannot find the path specified).

How can I export a folder to run success jar file at any where ?

Answer 1

如果您不需要在jar之外配置您的配置，只需将其包含在那里并使用getClass（）。getClassLoader（）。getResourceAsStream（“config.xml”）访问它，如果它位于“root”的级别“装在罐子里

Answer 2

Sounds like your application is looking for a configuration file using a relative path in the file system. In order to make the jar totally self-sufficient, the code would have to be modified to look for the config file in the classpath, and the file would have to be included in the jar.

To do this, the code that opens the file must be changed to use Class#getResourceAsStream() instead of using a File object.

Answer 3

I'd suggest you use ant or another build system. Here is a short tutorial on ant:

http://ant.apache.org/manual/tutorial-HelloWorldWithAnt.html

Its pretty easy to create an jar file using xml in your ant build script. I have done it many times:

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

Others may suggest maven and the like, but in reality they are all good choices. Exporting from an IDE such as eclipse really isn't a viable long term solution.

Answer 4

如果你的项目目录中有一个config-folder，并且你想要读取一个文件，你必须将这个文件夹复制到jar文件的目录中