blocks|key|3102679|text|我们使用以下Ant代码来查找包含我们的主类的jar。它需要Ant+1.8%2B。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3102680|<whichresource+class="${main.class}"+property="main.class.url">
++++<classpath>
++++++++<fileset+dir="${jar.dir}"+includes="*.jar"+/>
++++</classpath>
</whichresource>

<pathconvert+property="jar.file">
++++<url+url="${main.class.url}"+/>
++++<regexpmapper+from="jar:file:/(.*)!.*"+to="\1"+/>
</pathconvert>

<echo>Jar+file+containing+main+class:+${jar.file}</echo>|code-block|syntax|javascript|3102681|我希望这能回答你的问题。|3102682|马腾|3102683|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

We are using the following Ant code to find the jar containing our main class. It requires Ant 1.8+.

<pre><code>&lt;whichresource class="${main.class}" property="main.class.url"&gt;
 &lt;classpath&gt;
 &lt;fileset dir="${jar.dir}" includes="*.jar" /&gt;
 &lt;/classpath&gt;
&lt;/whichresource&gt;

&lt;pathconvert property="jar.file"&gt;
 &lt;url url="${main.class.url}" /&gt;
 &lt;regexpmapper from="jar:file:/(.*)!.*" to="\1" /&gt;
&lt;/pathconvert&gt;

&lt;echo&gt;Jar file containing main class: ${jar.file}&lt;/echo&gt;
</code></pre>

I hope this answers your question.

Maarten

blocks|key|4570100|text|试试jarscan。这是一个命令行java工具，如果你也想通过ant集成它，应该很容易。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4570101|entityMap|0|LINK|mutability|MUTABLE|url|https://jarscan.dev.java.net/^0|2|7|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Try <a href="https://jarscan.dev.java.net/" rel="nofollow">jarscan</a> . It is a commandline java tool, it should be easy if you want to integrate it through ant also.

blocks|key|4570183|text|我认为使用1行(ok，5行)的C-shell脚本可以更好地解决这个问题。假设您试图在某个目录中查找包含某个特定文件的jar文件列表。在csh提示符下尝试执行以下操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4570184|%25+cd+directory_where_your_jar_files_reside
%25+set+f2Search+=+filename_you_are_looking_for
%25+foreach+jarFile+(*.jar)++++
?+(jar+tvf+$jarFile+%7C+grep+$f2Search+>+/dev/null)+%7C%7C+echo+$jarFile
?+end|code-block|syntax|javascript|4570185|如果需要，您显然可以将输出连接到其他文件。这是一个Unix解决方案，不知道如何在Windows上做到这一点，对不起。很抱歉没有回答Ant的问题，但其他人已经回答了。希望这能帮上忙，-多发性硬化症|4570186|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|$]]

I think this problem can be better solved by a 1-line (ok, 5-line) C-shell script. Suppose you are trying to find a list of jar files in some directory that contain a certain file. Try this at your csh prompt:

<pre><code>% cd directory_where_your_jar_files_reside
% set f2Search = filename_you_are_looking_for
% foreach jarFile (*.jar) 
? (jar tvf $jarFile | grep $f2Search &gt; /dev/null) || echo $jarFile
? end
</code></pre>

You can obviously concat the output to some other file if required. This is a Unix solution, dunno how to do this on Windows, sorry. Apologies for not answering the Ant question, but others have answered it already. Hope this helps, - M.S.

blocks|key|786560|text|这并不是Ant的真正用途。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|786561|Ant主要是一个构建工具，它的核心功能围绕着这一点。是的，它可以用于其他功能，但最好还是使用它的本意。在JAR文件中查找类并不是它擅长的。|786562|在Java中这样做可能会更好。Java提供了打开JAR文件并检查其内容的功能。您可以使用这些来查找您正在查找的类。或者，使用其他旨在实现此目的的工具，例如Biju提到的Jarscan。|786563|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

That's not really what Ant is for. 

Ant is primarily a build tool, and it's core functionalities revolve around that. Yes, it can be used for additional functions, but it's still best to use it what it was intended for. Finding a class inside a JAR file isn't what it's good at.

You may be better off just doing this in Java. Java offers functionality to open up JAR files and inspect the contents. You can use those to find the class you are looking for. Or, use another tool that's intended to do that, such as the Jarscan that Biju mentions.

blocks|key|4570137|text|如果确实需要这样做，一种可行的方法是遍历所有JAR文件，并将每个JAR文件作为单独的classpath路径元素传递给available任务。您感兴趣的类将用于classname属性。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4570138|编辑:因为听起来您现在正在考虑非Ant解决方案，下面是find-my-class代码的一个变体：|4570139|import+java.net.URL;

public+class+ClassFinder+{

++++public+static+void+main(String[]+args)+throws+ClassNotFoundException+{
++++++++Class<?>+c+=+Class.forName(args[0]);
++++++++URL+url+=+c.getResource(c.getSimpleName()+%2B+".class");
++++++++System.out.println("location+of+"+%2B+args[0]+%2B+":+"+%2B+url);
++++}
}|code-block|syntax|javascript|4570140|在Java6中，您可以使用类路径通配符(请参阅"Understanding+class+path+wildcards")，因此应该很容易包含您的JAR目录，看看它有多快。|4570141|Edit2:如果你想找到多个位置...|4570142|import+java.io.IOException;
import+java.net.JarURLConnection;
import+java.net.URL;
import+java.net.URLConnection;
import+java.util.Enumeration;

public+class+ClassFinder+{

++++public+static+void+main(String[]+args)+throws+IOException+{
++++++++String+classResourceName+=+args[0].replaceAll("\\.",+"/")+%2B+".class";
++++++++ClassLoader+loader+=+ClassFinder.class.getClassLoader();
++++++++Enumeration<URL>+classResources+=+(loader+==+null)+?+ClassLoader.getSystemResources(classResourceName)+:+loader.getResources(classResourceName);
++++++++if+(classResources.hasMoreElements())+{
++++++++++++System.out.println("Locations+of+"+%2B+args[0]+%2B+":");
++++++++++++while+(classResources.hasMoreElements())+{
++++++++++++++++URL+url+=+classResources.nextElement();
++++++++++++++++URLConnection+conn+=+url.openConnection();
++++++++++++++++String+loc+=+(conn+instanceof+JarURLConnection)+?+((JarURLConnection)conn).getJarFile().getName()+:+url.toString();
++++++++++++++++System.out.println(loc);
++++++++++++}
++++++++}+else+{
++++++++++++System.out.println("No+locations+found+for+"+%2B+args[0]);
++++++++}
++++}
}|4570143|entityMap|0|LINK|mutability|MUTABLE|url|http://download.oracle.com/javase/6/docs/technotes/tools/windows/classpath.html^0|16|9|1M|9|27|9|0|0|0|N|10|0|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@$9|11|A|12|B|C]|$9|13|A|14|B|C]|$9|15|A|16|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|17|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|18|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|19|8|@]|D|@$9|1A|A|1B|1|1C]]|E|$]]|$1|O|3|P|5|6|7|1D|8|@]|D|@]|E|$]]|$1|Q|3|R|5|J|7|1E|8|@]|D|@]|E|$K|L]]|$1|S|3|-4|5|6|7|1F|8|@]|D|@]|E|$]]]|T|$U|$5|V|W|X|E|$Y|Z]]]]

If you really need to do this, one approach that might work is to loop through all the JAR files and pass each one to the <code>available</code> task as the lone <code>classpath</code> path element. The class you're interested in would be used for the <code>classname</code> attribute.

Edit: Since it sounds like you're now entertaining non-Ant solutions, here's a variation of the find-my-class code:

<pre><code>import java.net.URL;

public class ClassFinder {

 public static void main(String[] args) throws ClassNotFoundException {
 Class&lt;?&gt; c = Class.forName(args[0]);
 URL url = c.getResource(c.getSimpleName() + ".class");
 System.out.println("location of " + args[0] + ": " + url);
 }
}
</code></pre>

With Java 6, you can use classpath wildcards (see <a href="http://download.oracle.com/javase/6/docs/technotes/tools/windows/classpath.html" rel="nofollow">"Understanding class path wildcards"</a>), so it should be easy to include your directory of JARs and see how fast it is.

Edit2: And if you want to find multiple locations...

<pre><code>import java.io.IOException;
import java.net.JarURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.Enumeration;

public class ClassFinder {

 public static void main(String[] args) throws IOException {
 String classResourceName = args[0].replaceAll("\\.", "/") + ".class";
 ClassLoader loader = ClassFinder.class.getClassLoader();
 Enumeration&lt;URL&gt; classResources = (loader == null) ? ClassLoader.getSystemResources(classResourceName) : loader.getResources(classResourceName);
 if (classResources.hasMoreElements()) {
 System.out.println("Locations of " + args[0] + ":");
 while (classResources.hasMoreElements()) {
 URL url = classResources.nextElement();
 URLConnection conn = url.openConnection();
 String loc = (conn instanceof JarURLConnection) ? ((JarURLConnection)conn).getJarFile().getName() : url.toString();
 System.out.println(loc);
 }
 } else {
 System.out.println("No locations found for " + args[0]);
 }
 }
}
</code></pre>

blocks|key|994763|text|我同意rfeak的观点，这不是ANT设计的目的。话虽如此，确定如何解决丢失的类依赖关系可能非常令人沮丧……|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|994764|我使用findjar网站。它索引了大多数可用的开源库。|994765|entityMap|0|LINK|mutability|MUTABLE|url|http://www.findjar.com/index.x^0|3|5|0|3|7|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|S|8|@]|D|@$9|T|A|U|1|V]]|E|$]]|$1|H|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|I|$J|$5|K|L|M|E|$N|O]]]]

I agree with rfeak this is not what ANT is designed for. Having said that, it can very be a frustrating to determine how to resolve missing class dependencies.....

I use the <a href="http://www.findjar.com/index.x" rel="nofollow">findjar</a> website. It indexes most of the available open source libraries.

how to find the name of jar which contains the specific class through ant script?

Ant script to Find a jar file given the class name?

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如何通过ant脚本找到包含特定类的jar的名称？

问使用Ant脚本查找给定类名的jar文件？
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