在几十个 JAR 文件中的某个地方找到一个类?

编程入门行业动态更新时间:2024-10-08 13:34:10

本文介绍了在几十个 JAR 文件中的某个地方找到一个类?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！问题描述

如何在大量 jar 文件中找到特定的类名?

How would you find a particular class name inside lots of jar files?

(寻找实际的类名，而不是引用它的类.)

(Looking for the actual class name, not the classes that reference it.)

推荐答案

Unix

在 Linux、其他 Unix 变体、Windows 上的 Git Bash 或 Cygwin 上，使用 jar(或 unzip -v)、grep, 和 find 命令.

Unix

On Linux, other Unix variants, Git Bash on Windows, or Cygwin, use the jar (or unzip -v), grep, and find commands.

以下列出了与给定名称匹配的所有类文件:

The following lists all class files that match a given name:

for i in *.jar; do jar -tvf "$i" | grep -Hsi ClassName && echo "$i"; done

如果您知道要搜索的 Java 档案的完整列表，您可以使用(符号)链接将它们全部放在同一目录中.

If you know the entire list of Java archives you want to search, you could place them all in the same directory using (symbolic) links.

或者使用find(区分大小写)查找包含给定类名的JAR文件:

Or use find (case sensitively) to find the JAR file that contains a given class name:

find path/to/libs -name '*.jar' -exec grep -Hls ClassName {} ;

例如，要查找包含 IdentityHashingStrategy 的存档名称:

For example, to find the name of the archive containing IdentityHashingStrategy:

$ find . -name '*.jar' -exec grep -Hsli IdentityHashingStrategy {} ; ./trove-3.0.3.jar

如果 JAR 可以在系统中任何地方并且 locate 命令可用:

If the JAR could be anywhere in the system and the locate command is available:

for i in $(locate "*.jar"); do echo "$i"; jar -tvf "$i" | grep -Hsi ClassName; done

语法变体:

find path/to/libs -name '*.jar' -print | while read i; do jar -tvf "$i" | grep -Hsi ClassName && echo "$i"; done

视窗

打开命令提示符，切换到包含 JAR 文件的目录(或祖先目录)，然后:

Windows

Open a command prompt, change to the directory (or ancestor directory) containing the JAR files, then:

for /R %G in (*.jar) do @jar -tvf "%G" | find "ClassName" > NUL && echo %G

这是它的工作原理:

for/R %G in (*.jar) do - 循环遍历所有 JAR 文件，递归遍历目录；将文件名存储在 %G 中.

@jar -tvf "%G" | - 运行 Java Archive 命令以列出给定存档中的所有文件名，并将结果写入标准输出；@ 符号禁止打印命令的调用.

找到类名">NUL - 搜索标准输入，从 jar 命令的输出通过管道输入给定的类名；如果匹配，这会将 ERRORLEVEL 设置为 1(否则为 0).

&&echo %G - 如果 ERRORLEVEL 非零，则将 Java 存档文件名写入标准输出(控制台).

for /R %G in (*.jar) do - loop over all JAR files, recursively traversing directories; store the file name in %G.

@jar -tvf "%G" | - run the Java Archive command to list all file names within the given archive, and write the results to standard output; the @ symbol suppresses printing the command's invocation.

find "ClassName" > NUL - search standard input, piped from the output of the jar command, for the given class name; this will set ERRORLEVEL to 1 iff there's a match (otherwise 0).

&& echo %G - iff ERRORLEVEL is non-zero, write the Java archive file name to standard output (the console).

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