blocks|key|1825255|text|简短的回答|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1825256|对嵌套的<FileSet>使用<foreach>|offset|length|style|CODE|1825257|Foreach需要ant-contrib。|1825258|更新了最近的ant-contrib示例：|1825259|<target+name="foo">
++<foreach+target="bar"+param="theFile">
++++<fileset+dir="${server.src}"+casesensitive="yes">
++++++<include+name="**/*.java"/>
++++++<exclude+name="**/*Test*"/>
++++</fileset>
++</foreach>
</target>

<target+name="bar">
++<echo+message="${theFile}"/>
</target>|code-block|syntax|javascript|1825260|这将使用导致当前文件的${theFile}反调用目标"bar“。|1825261|entityMap|0|LINK|mutability|MUTABLE|url|http://ant-contrib.sourceforge.net/^0|0|4|9|F|9|0|9|B|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|11|8|@$D|12|E|13|F|G]|$D|14|E|15|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|16|8|@]|9|@$D|17|E|18|1|19]]|A|$]]|$1|J|3|K|5|6|7|1A|8|@]|9|@]|A|$]]|$1|L|3|M|5|N|7|1B|8|@]|9|@]|A|$O|P]]|$1|Q|3|R|5|6|7|1C|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|1D|8|@]|9|@]|A|$]]]|T|$U|$5|V|W|X|A|$Y|Z]]]]

<h2>Short Answer</h2>

Use <code>&lt;foreach&gt;</code> with a nested <code>&lt;FileSet&gt;</code>

Foreach requires <a href="http://ant-contrib.sourceforge.net/" rel="noreferrer">ant-contrib</a>.

Updated Example for recent ant-contrib:

<pre><code>&lt;target name="foo"&gt;
 &lt;foreach target="bar" param="theFile"&gt;
 &lt;fileset dir="${server.src}" casesensitive="yes"&gt;
 &lt;include name="**/*.java"/&gt;
 &lt;exclude name="**/*Test*"/&gt;
 &lt;/fileset&gt;
 &lt;/foreach&gt;
&lt;/target&gt;

&lt;target name="bar"&gt;
 &lt;echo message="${theFile}"/&gt;
&lt;/target&gt;
</code></pre>

This will antcall the target "bar" with the ${theFile} resulting in the current file.

blocks|key|1825293|text|ant-contrib是邪恶的；编写一个自定义的ant任务。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1825294|ant-contrib是邪恶的，因为它试图将ant从声明式风格转换为命令式风格。但是xml是一门糟糕的编程语言。|1825295|相比之下，自定义ant任务允许您使用真实的语言(Java)编写代码，使用真实的IDE，您可以在其中编写单元测试以确保具有所需的行为，然后在构建脚本中对所需的行为进行清晰的声明。|1825296|只有当您关心编写可维护的ant脚本时，这种夸夸其谈才有意义。如果你根本不关心可维护性，那就做任何有用的事情。:)|1825297|Jtf|1825298|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|N|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|O|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|P|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|K|$]]

ant-contrib is evil; write a custom ant task.

ant-contrib is evil because it tries to convert ant from a declarative style to an imperative style. But xml makes a crap programming language.

By contrast a custom ant task allows you to write in a real language (Java), with a real IDE, where you can write unit tests to make sure you have the behavior you want, and then make a clean declaration in your build script about the behavior you want.

This rant only matters if you care about writing maintainable ant scripts. If you don't care about maintainability by all means do whatever works. :)

Jtf

blocks|key|1825621|text|使用+task。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1825622|它为每个文件执行一次命令。通过文件集或任何其他资源指定文件。是内置的；不需要额外的依赖；不需要自定义任务实现。|1825623|也可以只运行该命令一次，将所有文件作为参数一次性附加。使用parallel属性切换行为。|1825624|对不起，我迟到了一年。|1825625|entityMap|0|LINK|mutability|MUTABLE|url|http://ant.apache.org/manual/Tasks/apply.html^0|2|5|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@$A|S|B|T|1|U]]|C|$]]|$1|D|3|E|5|6|7|V|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|W|8|@]|9|@]|C|$]]|$1|H|3|I|5|6|7|X|8|@]|9|@]|C|$]]|$1|J|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|K|$L|$5|M|N|O|C|$P|Q]]]]

Use the <a href="http://ant.apache.org/manual/Tasks/apply.html" rel="noreferrer">&lt;apply&gt; task</a>.

It executes a command once for each file. Specify the files by means of filesets or any other resource. &lt;apply&gt; is built-in; no additional dependency needed; no custom task implementation needed.

It's also possible to run the command only once, appending all files as arguments in one go. Use the parallel attribute to switch the behaviour.

Sorry for being late a year.

blocks|key|2039473|text|以下是使用javascript和ant+scriptdef任务完成此任务的方法，因为scriptdef是一个核心ant任务，所以您不需要ant-contrib就可以让此代码工作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2039474|<scriptdef+name="bzip2-files"+language="javascript">
<element+name="fileset"+type="fileset"/>
<![CDATA[
++importClass(java.io.File);
++filesets+=+elements.get("fileset");

++for+(i+=+0;+i+<+filesets.size();+%2B%2Bi)+{
++++fileset+=+filesets.get(i);
++++scanner+=+fileset.getDirectoryScanner(project);
++++scanner.scan();
++++files+=+scanner.getIncludedFiles();
++++for(+j=0;+j+<+files.length;+j%2B%2B)+{

++++++++var+basedir++=+fileset.getDir(project);
++++++++var+filename+=+files[j];
++++++++var+src+=+new+File(basedir,+filename);
++++++++var+dest=+new+File(basedir,+filename+%2B+".bz2");

++++++++bzip2+=+self.project.createTask("bzip2");++++++++
++++++++bzip2.setSrc(+src);
++++++++bzip2.setDestfile(dest+);+
++++++++bzip2.execute();
++++}
++}
]]>
</scriptdef>

<bzip2-files>
++++<fileset+id="test"+dir="upstream/classpath/jars/development">
++++++++++++<include+name="**/*.jar"+/>
++++</fileset>
</bzip2-files>|code-block|syntax|javascript|2039475|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Here is way to do this using javascript and the ant scriptdef task, you don't need ant-contrib for this code to work since scriptdef is a core ant task.

<pre><code>&lt;scriptdef name="bzip2-files" language="javascript"&gt;
&lt;element name="fileset" type="fileset"/&gt;
&lt;![CDATA[
 importClass(java.io.File);
 filesets = elements.get("fileset");

 for (i = 0; i &lt; filesets.size(); ++i) {
 fileset = filesets.get(i);
 scanner = fileset.getDirectoryScanner(project);
 scanner.scan();
 files = scanner.getIncludedFiles();
 for( j=0; j &lt; files.length; j++) {

 var basedir = fileset.getDir(project);
 var filename = files[j];
 var src = new File(basedir, filename);
 var dest= new File(basedir, filename + ".bz2");

 bzip2 = self.project.createTask("bzip2"); 
 bzip2.setSrc( src);
 bzip2.setDestfile(dest ); 
 bzip2.execute();
 }
 }
]]&gt;
&lt;/scriptdef&gt;

&lt;bzip2-files&gt;
 &lt;fileset id="test" dir="upstream/classpath/jars/development"&gt;
 &lt;include name="**/*.jar" /&gt;
 &lt;/fileset&gt;
&lt;/bzip2-files&gt;
</code></pre>

blocks|key|1825683|text|您可以使用ant-contrib任务"for“来迭代由任何分隔符分隔的文件列表，默认分隔符是"，”。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1825684|以下是示例文件，其中显示了这一点：|1825685|<project+name="modify-files"+default="main"+basedir=".">
++++<taskdef+resource="net/sf/antcontrib/antlib.xml"/>
++++<target+name="main">
++++++++<for+list="FileA,FileB,FileC,FileD,FileE"+param="file">
++++++++++<sequential>
++++++++++++<echo>Updating+file:+@{file}</echo>
++++++++++++
++++++++++</sequential>
++++++++</for>+++++++++++++++++++++++++
++++</target>
</project>|code-block|syntax|javascript|1825686|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

You can use the ant-contrib task "for" to iterate on the list of files separate by any delimeter, default delimeter is ",".

Following is the sample file which shows this:

<pre><code>&lt;project name="modify-files" default="main" basedir="."&gt;
 &lt;taskdef resource="net/sf/antcontrib/antlib.xml"/&gt;
 &lt;target name="main"&gt;
 &lt;for list="FileA,FileB,FileC,FileD,FileE" param="file"&gt;
 &lt;sequential&gt;
 &lt;echo&gt;Updating file: @{file}&lt;/echo&gt;
 &lt;!-- Do something with file here --&gt;
 &lt;/sequential&gt;
 &lt;/for&gt; 
 &lt;/target&gt;
&lt;/project&gt;
</code></pre>

blocks|key|2039526|text|按照blak3r的建议执行并定义目标类路径，如下所示|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2039527|<taskdef+resource="net/sf/antcontrib/antlib.xml">
++++<classpath>
++++++++<fileset+dir="lib">
++++++++++<include+name="**/*.jar"/>
++++++++</fileset>
++++</classpath>++++++++
</taskdef>|code-block|syntax|javascript|2039528|其中lib是您存储jar的位置|2039529|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Do what blak3r suggested and define your targets classpath like so 

<pre><code>&lt;taskdef resource="net/sf/antcontrib/antlib.xml"&gt;
 &lt;classpath&gt;
 &lt;fileset dir="lib"&gt;
 &lt;include name="**/*.jar"/&gt;
 &lt;/fileset&gt;
 &lt;/classpath&gt; 
&lt;/taskdef&gt;
</code></pre>

where lib is where you store your jar's

I want to execute a command from an Ant buildfile, for each file in a directory. 
I am looking for a platform-independent solution.

How do I do this?

Sure, I could write a script in some scripting language,
but this would add further dependencies to the project.

Ant: How to execute a command for each file in directory?

单元测试

Java

我想从一个Ant构建文件中为一个目录中的每个文件执行一个命令。我正在寻找一个独立于平台的解决方案。我该怎么做呢？当然，我可以用某种脚本语言编写脚本，但这会进一步增加项目的依赖性。

问Ant:如何对目录中的每个文件执行命令？
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