如何查找包含类定义的jar文件？ [英] how to find the jar file containing a class definition?

问题描述

你最喜欢的工具，插件，脚本，是在一堆jar文件中找到一个java类吗？

很多时候我继承代码，它不存在，它只是因为jar文件不包括在类路径中。但是，在什么jar文件（s）是类？我可能没有JAR（所以我必须在线搜索），或者添加JAR到类路径可能会创建一个重复的类定义问题。

我显然更喜欢eclipse插件，但我对任何软件工作与Windows。

我知道... Windows不是我的选择，但这是我得到的使用。

谢谢！

Luis

PS谢谢你的答案。在回顾一些回应后，我意识到我应该更好地解释我的情况。我们有一个下载或创建的JAR文件库，但有时该类将在某处在线。

解决方案

（这是对我之前版本的答案的改进，以 awk 特价/丑陋的报价为代价。）

（ findinjars ）。

 ＃！/ usr / bin / env bash 
 if [[（$＃-ne 1）&& （$＃-ne 2）]] 
然后
 echo用法是$ 0< grep模式以在'jar tvf'输出> [< top-of-dir-tree&如果缺少，当前dir]
 else 
 THING_TO_LOOKFOR =$ 1
 DIR = $ {2： - 。} 
如果[！ -d $ DIR];那么
 echodirectory [$ DIR] does not exist; 
 exit 1; 
 fi 
查找$ DIR-iname \ * .jar |同时读f; do（jar tf $ f | awk'{print'$ f'$ 0}'| grep -i$ THING_TO_LOOKFOR）; done 
 fi 
  

您可以使用以下方法调用它：

  $ findinjars abcdClass [directoryTreeRoot or，if missing，current dir] 
  

或只是

  $ findinjars partOfClassName [directoryTreeRoot or，if missing，current dir] 
  

完全限定类名中的点字符将被解释为任何字符的正则表达式，一个大事，因为这是一个启发式实用程序（这就是为什么它不区分大小写BTW）。通常我不打扰完整的类名，只是键入它的一部分。

What is your favorite tool, plugin, script, to find a java class in a bunch of jar files?

Very often I inherit code that complains about a class that doesn't exist, and it is just because the jar file is not included in the classpath. But, in what jar file(s) is the class? I may not have the JAR (so I have to search online), or adding a JAR to the classpath could create a duplicated class definition problem.

I obviously would prefer an eclipse plugin, but I'm open to any piece of software that works with Windows.

I know... Windows is not my choice, but that's what I got to work with.

Thanks!

Luis

P.S. Thank you for your answers. After reviewing some responses, I became aware that I should have explained better my scenario. We had a library of downloaded or created JAR files, but sometimes the class would be online somewhere.

解决方案

(This is an improvement over the script I had in previous versions of the answer as it produces much cleaner output at the price of some awk special/ugly quoting.)

I've built a script (findinjars) which does just that.

#!/usr/bin/env bash
if [[ ($# -ne 1) && ($# -ne 2) ]]
then
    echo "usage is $0 <grep pattern to look for in 'jar tvf' output> [<top-of-dir-tree> or, if missing, current dir]"
else
    THING_TO_LOOKFOR="$1"
    DIR=${2:-.}
    if [ ! -d $DIR ]; then
        echo "directory [$DIR] does not exist";
        exit 1;
    fi
    find "$DIR" -iname \*.jar | while read f ; do (jar tf $f | awk '{print "'"$f"'" "  " $0}' | grep -i "$THING_TO_LOOKFOR") ; done
fi

you can then invoke it with:

$findinjars a.b.c.d.Class [directoryTreeRoot or, if missing, current dir]

or just

$findinjars partOfClassName [directoryTreeRoot or, if missing, current dir]

Dot characters in the fully qualified class name will be interpreted in the regexp sense of 'any character' but that's not a big deal since this is a heuristics utility (that's why it's case-insensitive too BTW). Usually I don't bother with the full class name and just type part of it.

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