如何将ant中一组目录中的所有类添加到类路径中? [英] How to add to classpath all classes from set of directories in ant?

问题描述

如何将目录集中的所有类添加到类路径?

How to add to classpath all classes from set of directories?

我有以下属性:

class.dirs=lib1dir,lib2dir,lib3dir

class.dirs=lib1dir,lib2dir,lib3dir

这些目录下有类.
是否可以将这些目录下的所有类添加到类路径?

There are classes under these directories.
Is it possible to add all classes under these directories to classpath?

类似于:

<classpath>
   <dirset dir="${root.dir}" includes="${class.dirs}/**/*.class"/>
</classpath>

或

<classpath>
   <pathelement location="${class.dirs}" />
</classpath>

但是这个例子当然行不通.

But this example does not work, of course.

推荐答案

您可以设置路径以包含特定目录中的所有 .class 文件:

You can set up a path to include all .class files from your specific directories:

<path id="mypath"> 
  <fileset dir="${root.dir}">
    <include name="lib1dir/**/*.class lib2dir/**/*.class lib3dir/**/*.class"/>
  </fileset>
</path> 

但是，如果要将此路径用作类路径，则只需引用根文件夹即可，否则将在包名称转换为目录时得到ClassNotFoundError:

However, if you want to use this path as a classpath, you only need to reference the root folders, otherwise you will get ClassNotFoundErrors as the package names translate into directories:

<path id="build.classpath"> 
  <dirset dir="${root.dir}">
    <include name="lib1dir lib2dir lib3dir"/>
  </dirset>
</path> 

然后在使用时通过其 id 引用路径(例如用于类路径):

Then reference the path by its id when using (e.g. for classpath):

<javac srcdir="${src.dir}" destdir="${build.dir}" classpathref="build.classpath" />

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