Decompiling A Jar File With Jd-Cli: Processes And Output Options

This text explains the process of decompiling a single JAR file using jd-cli, a command line tool. It covers steps such as serial processing and skipping resources, and provides output options including console, directory, structured directory, or ZIP file with customizable paths.

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Java jar file decompiler

To decompile a single jar file we need more than just jd-core, which is a commandline tool to decompile a single class file at a time.

Use jd-cli which is downloadable at here.

Commandline usage:

# without docker
java -jar jd-cli.jar file-to-decompile.jar -ods decompiled-src
# with docker
docker run -it --rm -v `pwd`:/mnt --user $(id -u):$(id -g) \
kwart/jd-cli /mnt/file-to-decompile.jar -ods /mnt/decompiled-src

Full syntax:

Usage: java -jar jd-cli.jar [options] [Files to decompile]
Options:
--displayLineNumbers, -n
displays line numbers in decompiled classes
Default: false
--escapeUnicodeCharacters, -eu
escape unicode characters in decompiled classes
Default: false
--help, -h
shows this help
Default: false
--logLevel, -g
takes [level] as parameter and sets it as the CLI log level. Possible
values are: ALL, TRACE, DEBUG, INFO, WARN, ERROR, OFF
Default: INFO
--outputConsole, -oc
enables output to system output stream
Default: false
--outputDir, -od
takes a [directoryPath] as a parameter and configures a flat DIR output
for this path
--outputDirStructured, -ods
takes a [directoryPath] as a parameter and configures a structured DIR
output for this path
--outputZipFile, -oz
takes a [zipFilePath] as a parameter and configures ZIP output for this
path
--pattern, -p
RegExp pattern which the to-be-decompiled file has to match. Not matching
entries are skipped.
--serialProcessing, -sp
don't use parallel processing
Default: false
--skipResources, -sr
skips processing resources
Default: false
--version, -v
shows the version
Default: false