Find a class somewhere inside dozens of JAR files

Question

How would you find a particular class name inside lots of jar files    Looking for the actual class name  not the classes that reference it

User · Answer

This one works well in MinGW   windows bash environment     gitbash  Put this function into your  bashrc file in your HOME directory     this function helps you to find a jar file for the class function find jar of class       OLD IFS  IFS   IFS    n    jars      find -type f -name    jar        for i in   jars       do      if     -z    jar -tvf   i    grep -Hsi  1       then       echo   i      fi    done    IFS  OLD IFS

User · Answer

Unix  On Linux  other Unix variants  Git Bash on Windows  or Cygwin  use the jar  or unzip -v   grep  and find commands   The following lists all class files that match a given name   for i in   jar  do jar -tvf   i    grep -Hsi ClassName  amp  amp  echo   i   done   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   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         For example  to find the name of the archive containing IdentityHashingStrategy     find   -name    jar  -exec grep -Hsli IdentityHashingStrategy         trove-3 0 3 jar   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   A syntax variation   find path to libs -name    jar  -print       while read i  do jar -tvf   i    grep -Hsi ClassName  amp  amp  echo   i   done    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   gt  NUL  amp  amp  echo  G   Here s how it works    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   gt  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    amp  amp  echo  G - iff ERRORLEVEL is non-zero  write the Java archive file name to standard output  the console     Web  Use a search engine that scans JAR files

User · Answer

grep -l  classname    jar   gives you the name of the jar  find   -name    jar  -exec jar -t -f         grep   classname    gives you the package of the class

User · Answer

I ve always used this on Windows and its worked exceptionally well   findstr  s  m  c  package classname    jar  where   findstr exe comes standard with Windows and the params     s   recursively  m   print only the filename if there is a match  c   literal string  in this case your package name   class names separated by        Hope this helps someone

User · Answer

Not sure why scripts here have never really worked for me  This works      bin bash for i in   jar  do jar -tf   i    grep  1   xargs -I   echo -e   i         done

User · Answer

To find a class in a folder  and subfolders  bunch of JARs  https   jarscan com   Usage  java -jar jarscan jar  -help                            -dir directory name                       -zip                       -showProgress                       lt -files   -class   -package gt                       lt search string 1 gt   search string 2                       search string n   Help    -help or              Displays this message     -dir                  The directory to start searching                         from default is        -zip                  Also search Zip files    -showProgress         Show a running count of files read in    -files or -class      Search for a file or Java class                         contained in some library                          i e  HttpServlet    -package              Search for a Java package                         contained in some library                          i e  javax servlet http    search string         The file or package to                         search for                          i e  see examples above   Example   java -jar jarscan jar -dir C  Folder To Search -showProgress -class GenericServlet

User · Answer

You can find a class in a directory full of jars with a bit of shell   Looking for class  FooBar    LIB DIR  some dir full of jarfiles for jarfile in   find  LIBDIR -name    jar    do    echo  -------- jarfile---------------     jar -tvf  jarfile   grep FooBar done

User · Answer

Eclipse can do it  just create a  temporary  project and put your libraries on the projects classpath  Then you can easily find the classes   Another tool  that comes to my mind  is Java Decompiler  It can open a lot of jars at once and helps to find classes as well

User · Answer

If you have an instance of the class  or can get one  you have a pure java solution   try      Class clazz   Class forName          try          Class clazz   Class forName  class-name            String name       clazz getName   replace             class           URL url   clazz getResource name           String jar   url toString   substring 10  replaceAll                     System out println  jar         catch Exception err           err printStackTrace            Of course  the first two line have to adapted according to where you have an instance of the class or the class name

User · Answer

Check JBoss Tattletale  although I ve never used it personally  this seems to be the tool you need

User · Answer

To search all jar files in a given directory for a particular class  you can do this   ls   jar   xargs grep -F MyClass   or  even simpler   grep -F MyClass   jar   Output looks like this   Binary file foo jar matches   It s very fast because the -F option means search for Fixed string  so it doesn t load the the regex engine for each grep invocation   If you need to  you can always omit the -F option and use regexes

User · Answer

To add yet another tool    this is a very simple and useful tool for windows  A simple exe file you click on  give it a directory to search in  a class name and it will find the jar file that contains that class  Yes  it s recursive   http   sourceforge net projects jarfinder

User · Answer

In eclipse you can use the old but still usable plugin jarsearch

User · Answer

Grepj is a command line utility to search for classes within jar files  I am the author of the utility   You can run the utility like grepj package Class my1 jar my2 war my3 ear  Multiple jar  ear  war files can be provided  For advanced usage use find to provide a list of jars to be searched

User · Answer

I found this new way  bash   ls -1    xargs -i -t jar -tvf       grep Abstract jar -tvf activation-1 1 jar jar -tvf antisamy-1 4 3 jar   2263 Thu Jan 13 21 38 10 IST 2011 org owasp validator html scan AbstractAntiSamyScanner class       So this lists the jar and the class if found  if you want you can give ls -1   jar or input to xargs with find command HTH Someone

User · Answer

Use this   you can find any file in classpath   guaranteed     import java net URL  import java net URLClassLoader  import java util zip ZipEntry  import java util zip ZipInputStream   public class FileFinder        public static void main String   args  throws Exception            String file    lt your file name gt            ClassLoader cl   ClassLoader getSystemClassLoader             URL   urls     URLClassLoader cl  getURLs             for URL url  urls               listFiles file  url                        private static void listFiles String file  URL url  throws Exception          ZipInputStream zip   new ZipInputStream url openStream               while true                ZipEntry e   zip getNextEntry                if  e    null                break              String name   e getName                if  name endsWith file                     System out println url toString       - gt      name

User · Answer

Just use FindClassInJars util  it s a simple swing program  but useful  You can check source code or download jar file at http   code google com p find-class-in-jars

User · Answer

A bit late to the party  but nevertheless     I ve been using JarBrowser to find in which jar a particular class is present   It s got an easy to use GUI which allows you to browse through the contents of all the jars in the selected path

User · Answer

A bash script solution using unzip  zipinfo   Tested on Ubuntu 12      bin bash      jarwalker sh   a Starting Path   aClassName   IFS    n  jars      find -P   1  -type f -name    jar       for jar in   jars         do         classes      zipinfo -1   jar    awk -F       print  NF     grep  class   awk -F       print  1               if      classes     -ge 0    then             for class in   classes                     do                     if     class       2     then                         echo  Found in   jar                       fi                 done         fi     done

User · Answer

I know this is an old question but    I had the same issue  so If someone is looking for a very simple solution for windows - there is a software named Locate32 Just put jar as file extension And containing the class name It finds the file within seconds

User · Answer

ClassFinder is a program that s designed to solve this problem  It allows you to search recursively through directories and jar files to find all instances of a class matching a pattern  It is written in Java  not python  It has a nice GUI which makes it easy to use  And it runs fast  This release is precompiled in a runnable jar so you don t have to build it from source   Download it here  ClassFinder 1 0

User · Answer

To locate jars that match a given string   find   -name    jar -exec grep -l YOUR CLASSNAME

User · Answer

One thing to add to all of the above  if you don t have the jar executable available  it comes with the JDK but not with the JRE   you can use unzip  or WinZip  or whatever  to accomplish the same thing

User · Answer

There are also two different utilities called both  JarScan  that do exactly what you are asking for  JarScan  inetfeedback com  and JarScan  java net

User · Answer

Under a Linux environment you could do the following      find  lt base dir gt  -name   jar -print0   xargs -0 -l jar tf   grep  lt name gt    Where name is the name of the class file that you are looking inside the jars distributed across the hierarchy of directories rooted at the base dir

User · Answer

Check this Plugin for eclipse which can do the job you are looking for   https   marketplace eclipse org content jarchiveexplorer

User · Answer

shameless self promotion  but you can try a utility I wrote   http   sourceforge net projects zfind  It supports most common archive compressed files  jar  zip  tar  tar gz etc  and unlike many other jar zip finders  supports nested zip files  zip within zip  jar within jar etc  till unlimited depth

User · Answer

Filename  searchForFiles py  import os  zipfile  glob  sys  def main        searchFile   sys argv 1   class file to search for  sent from batch file below  optional  see second block of code below      listOfFilesInJar          for file in glob glob    jar            archive   zipfile ZipFile file   r           for x in archive namelist                if str searchFile  in str x                   listOfFilesInJar append file       for something in listOfFilesInJar          print  location of   str searchFile       something   if   name         main         sys exit main      You can easily run this by making a  bat file with the following text  replace  AddWorkflows class  with the file you are searching for     File  CallSearchForFiles bat    echo off python -B -c  import searchForFiles x searchForFiles main     AddWorkflows class pause   You can double-click CallSearchForFiles bat to run it  or call it from the command line  CallSearchForFiles bat SearchFile class   Click to See Example Output

User · Answer

You can use locate and grep   locate jar   xargs grep  my class    Make sure you run updatedb before using locate

User · Answer

I didn t know of a utility to do it when I came across this problem  so I wrote the following   public class Main                                private static String CLASS FILE TO FIND                class to find Here       private static List lt String gt  foundIn   new LinkedList lt String gt                      param args the first argument is the path of the file to search in  The second may be the               class file to find              public static void main String   args            if   CLASS FILE TO FIND endsWith   class                  CLASS FILE TO FIND   CLASS FILE TO FIND replace               class                     File start   new File args 0            if  args length  gt  1                CLASS FILE TO FIND   args 1                     search start           System out println  ------RESULTS------            for  String s   foundIn                System out println s                        private static void search File start            try               final FileFilter filter   new FileFilter                      public boolean accept File pathname                        return pathname getName   endsWith   jar      pathname isDirectory                                                 for  File f   start listFiles filter                     if  f isDirectory                          search f                     else                       searchJar f                                             catch  Exception e                System err println  Error at      start getPath           e getMessage                          private static void searchJar File f            try               System out println  Searching      f getPath                 JarFile jar   new JarFile f               ZipEntry e   jar getEntry CLASS FILE TO FIND               if  e    null                    e   jar getJarEntry CLASS FILE TO FIND                   if  e    null                        foundIn add f getPath                                     else                   foundIn add f getPath                             catch  IOException e                e printStackTrace

User · Answer

bin bash  pattern  1 shift  for jar in   find    -type f -name    jar   do   match  jar -tvf  jar   grep  pattern    if     -z   match      then     echo  Found in   jar      echo   match    fi done

User · Answer

Script to find jar file  find jar sh  IFS   echo -en   n b     Set the field separator newline  for f in  find   1  -iname   jar   do   jar -tf   f   grep --color  2   if         0    then     echo -n  Match found        echo -e    f  n    fi done unset IFS   Usage    find jar sh  lt  top-level directory containing jar files    lt  Class name to find   This is similar to most answers given here  But it only outputs the file name  if grep finds something  If you want to suppress grep output you may redirect that to  dev null but I prefer seeing the output of grep as well so that I can use partial class names and figure out the correct one from a list of output shown   The class name can be both simple class name Like  String  or fully qualified name like  java lang String

User · Answer

some time ago  I wrote a program just for that  https   github com javalite jar-explorer

User · Answer

Following script will help you out  for file in   jar do     do something on   file    echo   file     usr local jdk bin jar -tvf   file    grep   CLASSNAME  done

User · Answer

user1207523 s script works fine for me  Here is a variant that searches for jar files recusively using find instead of simple expansion      bin bash for i in  find   -name    jar    do jar -tf   i    grep  1   xargs -I   echo -e   i         done

[java] Find a class somewhere inside dozens of JAR files?

Examples related to java

Examples related to class

Examples related to jar

Examples related to project-structure

Examples related to text-search