Linux cmd 在 jar 中搜索类文件，而不考虑 jar 路径 [英] Linux cmd to search for a class file among jars irrespective of jar path

问题描述

我想在许多 jar 文件中搜索一个特定的类文件，而不给出每个 jar 文件的位置.

I want to search for a particular class file among many jar files without giving the location of each jar file.

这可以通过一个简单的命令来实现吗?

Is this possible with a simple command?

我试过这个命令:

grep Hello.class *.jar

它没有返回包含该类的 jar 列表.然后我运行命令:

Which did not return a list of jars containing the class. Then I ran the command:

grep Hello.class /full/path/of/jar/file/*.jar

确实返回了相关的 jar 文件.有没有更好的办法?

Which did return the relevant jar file. Is there a better way?

推荐答案

你的jar文件在哪里?是否有模式可以找到它们的位置?

Where are you jar files? Is there a pattern to find where they are?

例如foo/a/a.jar和foo/b/b.jar都在foo/文件夹下，在这种情况下，您可以将 find 与 grep 一起使用:

For example, foo/a/a.jar and foo/b/b.jar are all under the folder foo/, in this case, you could use find with grep:

find foo/ -name "*.jar" | xargs grep Hello.class

可以，至少你可以在根目录/下搜索，但是会很慢.

Sure, at least you can search them under the root directory /, but it will be slow.

正如@loganaayahee 所说，您也可以使用命令locate.locate 使用索引搜索文件，这样会更快.但命令应该是:

As @loganaayahee said, you could also use the command locate. locate search the files with an index, so it will be faster. But the command should be:

locate "*.jar" | xargs grep Hello.class

因为你要搜索jar文件的内容.

Since you want to search the content of the jar files.

通常，Java 会将查找 jar 文件的路径存储在像 CLASS_PATH 这样的环境变量中，我不知道这是否是您想要的.但是如果你的变量是这样的:CLASS_PATH=/lib:/usr/lib:/bin，它使用 : 来分隔路径，那么你可以使用这个推荐搜索类:

Typically, Java will store the paths to find jar files in an environment variable like CLASS_PATH, I don't know if this is what you want. But if your variable is just like this:CLASS_PATH=/lib:/usr/lib:/bin, which use a : to separate the paths, then you could use this commend to search the class:

for P in `echo $CLASS_PATH | sed 's/:/ /g'`; do grep Hello.calss $P/*.jar; done

这篇关于Linux cmd 在 jar 中搜索类文件，而不考虑 jar 路径的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！