Mac 安装Java反编译工具JD-GUI
一、下载JD-GUI软件
1.首先到Github下载JD-GUI软件：
github java-decompiler/jd-gui Public
选择jd-gui-osx-1.6.6.tar.
2.解压打开软件，但是提示错误：
3.确保本机已安装JDK.
4.如果确定已经安装了JDK海报这个这个错误，选中JD-GUI,右键显示包内容，找到这个文件：
5.文本编辑器编辑这个universalJavaApplicationStub.sh
6.使用以下内容替换：
#!/bin/bash
##################################################################################
# #
# universalJavaApplicationStub #
# #
# A BASH based JavaApplicationStub for Java Apps on Mac OS X #
# that works with both Apple's and Oracle's plist format. #
# #
# Inspired by Ian Roberts stackoverflow answer #
# at http://stackoverflow.com/a/17546508/1128689 #
# #
# @author Tobias Fischer #
# @url https://github.com/tofi86/universalJavaApplicationStub #
# @date 2020-03-19 #
# @version 3.0.6 #
# #
##################################################################################
# #
# The MIT License (MIT) #
# #
# Copyright (c) 2014-2020 Tobias Fischer #
# #
# Permission is hereby granted, free of charge, to any person obtaining a copy #
# of this software and associated documentation files (the "Software"), to deal #
# in the Software without restriction, including without limitation the rights #
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell #
# copies of the Software, and to permit persons to whom the Software is #
# furnished to do so, subject to the following conditions: #
# #
# The above copyright notice and this permission notice shall be included in all #
# copies or substantial portions of the Software. #
# #
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR #
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, #
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE #
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER #
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, #
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE #
# SOFTWARE. #
# #
################################################################################### function 'stub_logger()'
#
# A logger which logs to the macOS Console.app using the 'syslog' command
#
# @param1 the log message
# @return void
################################################################################
function stub_logger() {syslog -s -k \\Facility com.apple.console \\Level Notice \\Sender "$(basename "$0")" \\Message "[$$][${CFBundleName:-$(basename "$0")}] $1"
}# set the directory abspath of the current
# shell script with symlinks being resolved
############################################PRG=$0
while [ -h "$PRG" ]; dols=$(ls -ld "$PRG")link=$(expr "$ls" : '^.*-> \\(.*\\)$' 2>/dev/null)if expr "$link" : '^/' 2> /dev/null >/dev/null; thenPRG="$link"elsePRG="$(dirname "$PRG")/$link"fi
done
PROGDIR=$(dirname "$PRG")
stub_logger "[StubDir] $PROGDIR"# set files and folders
############################################# the absolute path of the app package
cd "$PROGDIR"/../../ || exit 11
AppPackageFolder=$(pwd)# the base path of the app package
cd .. || exit 12
AppPackageRoot=$(pwd)# set Apple's Java folder
AppleJavaFolder="${AppPackageFolder}"/Contents/Resources/Java# set Apple's Resources folder
AppleResourcesFolder="${AppPackageFolder}"/Contents/Resources# set Oracle's Java folder
OracleJavaFolder="${AppPackageFolder}"/Contents/Java# set Oracle's Resources folder
OracleResourcesFolder="${AppPackageFolder}"/Contents/Resources# set path to Info.plist in bundle
InfoPlistFile="${AppPackageFolder}"/Contents/Info.plist# set the default JVM Version to a null string
JVMVersion=""
JVMMaxVersion=""# function 'plist_get()'
#
# read a specific Plist key with 'PlistBuddy' utility
#
# @param1 the Plist key with leading colon ':'
# @return the value as String or Array
################################################################################
plist_get(){/usr/libexec/PlistBuddy -c "print $1" "${InfoPlistFile}" 2> /dev/null
}# function 'plist_get_java()'
#
# read a specific Plist key with 'PlistBuddy' utility
# in the 'Java' or 'JavaX' dictionary (<dict>)
#
# @param1 the Plist :Java(X):Key with leading colon ':'
# @return the value as String or Array
################################################################################
plist_get_java(){plist_get ${JavaKey:-":Java"}$1
}# read Info.plist and extract JVM options
############################################# read the program name from CFBundleName
CFBundleName=$(plist_get ':CFBundleName')# read the icon file name
CFBundleIconFile=$(plist_get ':CFBundleIconFile')# check Info.plist for Apple style Java keys -> if key :Java is present, parse in apple mode
/usr/libexec/PlistBuddy -c "print :Java" "${InfoPlistFile}" > /dev/null 2>&1
exitcode=$?
JavaKey=":Java"# if no :Java key is present, check Info.plist for universalJavaApplication style JavaX keys -> if key :JavaX is present, parse in apple mode
if [ $exitcode -ne 0 ]; then/usr/libexec/PlistBuddy -c "print :JavaX" "${InfoPlistFile}" > /dev/null 2>&1exitcode=$?JavaKey=":JavaX"
fi# read 'Info.plist' file in Apple style if exit code returns 0 (true, ':Java' key is present)
if [ $exitcode -eq 0 ]; thenstub_logger "[PlistStyle] Apple"# set Java and Resources folderJavaFolder="${AppleJavaFolder}"ResourcesFolder="${AppleResourcesFolder}"APP_PACKAGE="${AppPackageFolder}"JAVAROOT="${AppleJavaFolder}"USER_HOME="$HOME"# read the Java WorkingDirectoryJVMWorkDir=$(plist_get_java ':WorkingDirectory' | xargs)# set Working Directory based upon PList valueif [[ ! -z ${JVMWorkDir} ]]; thenWorkingDirectory="${JVMWorkDir}"else# AppPackageRoot is the standard WorkingDirectory when the script is startedWorkingDirectory="${AppPackageRoot}"fi# expand variables $APP_PACKAGE, $JAVAROOT, $USER_HOMEWorkingDirectory=$(eval echo "${WorkingDirectory}")# read the MainClass nameJVMMainClass="$(plist_get_java ':MainClass')"# read the SplashFile nameJVMSplashFile=$(plist_get_java ':SplashFile')# read the JVM Properties as an array and retain spacesIFS=$'\\t\\n'JVMOptions=($(xargs -n1 <<<$(plist_get_java ':Properties' | grep " =" | sed 's/^ */-D/g' | sed -E 's/ = (.*)$/="\\1"/g')))unset IFS# post processing of the array follows further below...# read the ClassPath in either Array or String styleJVMClassPath_RAW=$(plist_get_java ':ClassPath' | xargs)if [[ $JVMClassPath_RAW == *Array* ]] ; thenJVMClassPath=.$(plist_get_java ':ClassPath' | grep " " | sed 's/^ */:/g' | tr -d '\\n' | xargs)elseJVMClassPath=${JVMClassPath_RAW}fi# expand variables $APP_PACKAGE, $JAVAROOT, $USER_HOMEJVMClassPath=$(eval echo "${JVMClassPath}")# read the JVM Options in either Array or String styleJVMDefaultOptions_RAW=$(plist_get_java ':VMOptions' | xargs)if [[ $JVMDefaultOptions_RAW == *Array* ]] ; thenJVMDefaultOptions=$(plist_get_java ':VMOptions' | grep " " | sed 's/^ */ /g' | tr -d '\\n' | xargs)elseJVMDefaultOptions=${JVMDefaultOptions_RAW}fi# read StartOnMainThread and add as -XstartOnFirstThreadJVMStartOnMainThread=$(plist_get_java ':StartOnMainThread')if [ "${JVMStartOnMainThread}" == "true" ]; thenJVMDefaultOptions+=" -XstartOnFirstThread"fi# read the JVM Arguments in either Array or String style (#76) and retain spacesIFS=$'\\t\\n'MainArgs_RAW=$(plist_get_java ':Arguments' | xargs)if [[ $MainArgs_RAW == *Array* ]] ; thenMainArgs=($(xargs -n1 <<<$(plist_get_java ':Arguments' | tr -d '\\n' | sed -E 's/Array \\{ *(.*) *\\}/\\1/g' | sed 's/ */ /g')))elseMainArgs=($(xargs -n1 <<<$(plist_get_java ':Arguments')))fiunset IFS# post processing of the array follows further below...# read the Java version we want to findJVMVersion=$(plist_get_java ':JVMVersion' | xargs)# post processing of the version string follows below...# read 'Info.plist' file in Oracle style
elsestub_logger "[PlistStyle] Oracle"# set Working Directory and Java and Resources folderJavaFolder="${OracleJavaFolder}"ResourcesFolder="${OracleResourcesFolder}"WorkingDirectory="${OracleJavaFolder}"APP_ROOT="${AppPackageFolder}"# read the MainClass nameJVMMainClass="$(plist_get ':JVMMainClassName')"# read the SplashFile nameJVMSplashFile=$(plist_get ':JVMSplashFile')# read the JVM Options as an array and retain spacesIFS=$'\\t\\n'JVMOptions=($(plist_get ':JVMOptions' | grep " " | sed 's/^ *//g'))unset IFS# post processing of the array follows further below...# read the ClassPath in either Array or String styleJVMClassPath_RAW=$(plist_get ':JVMClassPath')if [[ $JVMClassPath_RAW == *Array* ]] ; thenJVMClassPath=.$(plist_get ':JVMClassPath' | grep " " | sed 's/^ */:/g' | tr -d '\\n' | xargs)# expand variables $APP_PACKAGE, $JAVAROOT, $USER_HOMEJVMClassPath=$(eval echo "${JVMClassPath}")elif [[ ! -z ${JVMClassPath_RAW} ]] ; thenJVMClassPath=${JVMClassPath_RAW}# expand variables $APP_PACKAGE, $JAVAROOT, $USER_HOMEJVMClassPath=$(eval echo "${JVMClassPath}")else#default: fallback to OracleJavaFolderJVMClassPath="${JavaFolder}/*"# Do NOT expand the default 'AppName.app/Contents/Java/*' classpath (#42)fi# read the JVM Default OptionsJVMDefaultOptions=$(plist_get ':JVMDefaultOptions' | grep -o " \\-.*" | tr -d '\\n' | xargs)# read the Main Arguments from JVMArguments key as an array and retain spaces (see #46 for naming details)IFS=$'\\t\\n'MainArgs=($(xargs -n1 <<<$(plist_get ':JVMArguments' | tr -d '\\n' | sed -E 's/Array \\{ *(.*) *\\}/\\1/g' | sed 's/ */ /g')))unset IFS# post processing of the array follows further below...# read the Java version we want to findJVMVersion=$(plist_get ':JVMVersion' | xargs)# post processing of the version string follows below...
fi# (#75) check for undefined icons or icon names without .icns extension and prepare
# an osascript statement for those cases when the icon can be shown in the dialog
DialogWithIcon=""
if [ ! -z ${CFBundleIconFile} ]; thenif [[ ${CFBundleIconFile} == *.icns ]] && [[ -f "${ResourcesFolder}/${CFBundleIconFile}" ]] ; thenDialogWithIcon=" with icon path to resource \\"${CFBundleIconFile}\\" in bundle (path to me)"elif [[ ${CFBundleIconFile} != *.icns ]] && [[ -f "${ResourcesFolder}/${CFBundleIconFile}.icns" ]] ; thenCFBundleIconFile+=".icns"DialogWithIcon=" with icon path to resource \\"${CFBundleIconFile}\\" in bundle (path to me)"fi
fi# JVMVersion: post processing and optional splitting
if [[ ${JVMVersion} == *";"* ]]; thenminMaxArray=(${JVMVersion//;/ })JVMVersion=${minMaxArray[0]//+}JVMMaxVersion=${minMaxArray[1]//+}
fi
stub_logger "[JavaRequirement] JVM minimum version: ${JVMVersion}"
stub_logger "[JavaRequirement] JVM maximum version: ${JVMMaxVersion}"# MainArgs: replace occurences of $APP_ROOT with its content
MainArgsArr=()
for i in "${MainArgs[@]}"
doMainArgsArr+=("$(eval echo "$i")")
done# JVMOptions: replace occurences of $APP_ROOT with its content
JVMOptionsArr=()
for i in "${JVMOptions[@]}"
doJVMOptionsArr+=("$(eval echo "$i")")
done# internationalized messages
############################################LANG=$(defaults read -g AppleLocale)
stub_logger "[Language] $LANG"# French localization
if [[ $LANG == fr* ]] ; thenMSG_ERROR_LAUNCHING="ERREUR au lancement de '${CFBundleName}'."MSG_MISSING_MAINCLASS="'MainClass' n'est pas spécifié.\\nL'application Java ne peut pas être lancée."MSG_JVMVERSION_REQ_INVALID="La syntaxe de la version de Java demandée est invalide: %s\\nVeuillez contacter le développeur de l'application."MSG_NO_SUITABLE_JAVA="La version de Java installée sur votre système ne convient pas.\\nCe programme nécessite Java %s"MSG_JAVA_VERSION_OR_LATER="ou ultérieur"MSG_JAVA_VERSION_LATEST="(dernière mise à jour)"MSG_JAVA_VERSION_MAX="à %s"MSG_NO_SUITABLE_JAVA_CHECK="Merci de bien vouloir installer la version de Java requise."MSG_INSTALL_JAVA="Java doit être installé sur votre système.\\nRendez-vous sur java.com et suivez les instructions d'installation..."MSG_LATER="Plus tard"MSG_VISIT_JAVA_DOT_COM="Java by Oracle"MSG_VISIT_ADOPTOPENJDK="Java by AdoptOpenJDK"# German localization
elif [[ $LANG == de* ]] ; thenMSG_ERROR_LAUNCHING="FEHLER beim Starten von '${CFBundleName}'."MSG_MISSING_MAINCLASS="Die 'MainClass' ist nicht spezifiziert!\\nDie Java-Anwendung kann nicht gestartet werden!"MSG_JVMVERSION_REQ_INVALID="Die Syntax der angeforderten Java-Version ist ungültig: %s\\nBitte kontaktieren Sie den Entwickler der App."MSG_NO_SUITABLE_JAVA="Es wurde keine passende Java-Version auf Ihrem System gefunden!\\nDieses Programm benötigt Java %s"MSG_JAVA_VERSION_OR_LATER="oder neuer"MSG_JAVA_VERSION_LATEST="(neuste Unterversion)"MSG_JAVA_VERSION_MAX="bis %s"MSG_NO_SUITABLE_JAVA_CHECK="Stellen Sie sicher, dass die angeforderte Java-Version installiert ist."MSG_INSTALL_JAVA="Auf Ihrem System muss die 'Java'-Software installiert sein.\\nBesuchen Sie java.com für weitere Installationshinweise."MSG_LATER="Später"MSG_VISIT_JAVA_DOT_COM="Java von Oracle"MSG_VISIT_ADOPTOPENJDK="Java von AdoptOpenJDK"# Simplifyed Chinese localization
elif [[ $LANG == zh* ]] ; thenMSG_ERROR_LAUNCHING="无法启动 '${CFBundleName}'."MSG_MISSING_MAINCLASS="没有指定 'MainClass'！\\nJava程序无法启动!"MSG_JVMVERSION_REQ_INVALID="Java版本参数语法错误: %s\\n请联系该应用的开发者。"MSG_NO_SUITABLE_JAVA="没有在系统中找到合适的Java版本！\\n必须安装Java %s才能够使用该程序！"MSG_JAVA_VERSION_OR_LATER="及以上版本"MSG_JAVA_VERSION_LATEST="（最新版本）"MSG_JAVA_VERSION_MAX="最高为 %s"MSG_NO_SUITABLE_JAVA_CHECK="请确保系统中安装了所需的Java版本"MSG_INSTALL_JAVA="你需要在Mac中安装Java运行环境！\\n访问 java.com 了解如何安装。"MSG_LATER="稍后"MSG_VISIT_JAVA_DOT_COM="Java by Oracle"MSG_VISIT_ADOPTOPENJDK="Java by AdoptOpenJDK"# English default localization
elseMSG_ERROR_LAUNCHING="ERROR launching '${CFBundleName}'."MSG_MISSING_MAINCLASS="'MainClass' isn't specified!\\nJava application cannot be started!"MSG_JVMVERSION_REQ_INVALID="The syntax of the required Java version is invalid: %s\\nPlease contact the App developer."MSG_NO_SUITABLE_JAVA="No suitable Java version found on your system!\\nThis program requires Java %s"MSG_JAVA_VERSION_OR_LATER="or later"MSG_JAVA_VERSION_LATEST="(latest update)"MSG_JAVA_VERSION_MAX="up to %s"MSG_NO_SUITABLE_JAVA_CHECK="Make sure you install the required Java version."MSG_INSTALL_JAVA="You need to have JAVA installed on your Mac!\\nVisit java.com for installation instructions..."MSG_LATER="Later"MSG_VISIT_JAVA_DOT_COM="Java by Oracle"MSG_VISIT_ADOPTOPENJDK="Java by AdoptOpenJDK"
fi# function 'get_java_version_from_cmd()'
#
# returns Java version string from 'java -version' command
# works for both old (1.8) and new (9) version schema
#
# @param1 path to a java JVM executable
# @return the Java version number as displayed in 'java -version' command
################################################################################
function get_java_version_from_cmd() {# second sed command strips " and -ea from the version stringecho $("$1" -version 2>&1 | awk '/version/{print $3}' | sed -E 's/"//g;s/-ea//g')
}# function 'extract_java_major_version()'
#
# extract Java major version from a version string
#
# @param1 a Java version number ('1.8.0_45') or requirement string ('1.8+')
# @return the major version (e.g. '7', '8' or '9', etc.)
################################################################################
function extract_java_major_version() {echo $(echo "$1" | sed -E 's/^1\\.//;s/^([0-9]+)(-ea|(\\.[0-9_.]{1,7})?)(-b[0-9]+-[0-9]+)?[+*]?$/\\1/')
}# function 'get_comparable_java_version()'
#
# return comparable version for a Java version number or requirement string
#
# @param1 a Java version number ('1.8.0_45') or requirement string ('1.8+')
# @return an 8 digit numeral ('1.8.0_45'->'08000045'; '9.1.13'->'09001013')
################################################################################
function get_comparable_java_version() {# cleaning: 1) remove leading '1.'; 2) remove build string (e.g. '-b14-468'); 3) remove 'a-Z' and '-*+' (e.g. '-ea'); 4) replace '_' with '.'local cleaned=$(echo "$1" | sed -E 's/^1\\.//g;s/-b[0-9]+-[0-9]+$//g;s/[a-zA-Z+*\\-]//g;s/_/./g')# splitting at '.' into an arraylocal arr=( ${cleaned//./ } )# echo a string with left padded version numbersecho "$(printf '%02s' ${arr[0]})$(printf '%03s' ${arr[1]})$(printf '%03s' ${arr[2]})"
}# function 'is_valid_requirement_pattern()'
#
# check whether the Java requirement is a valid requirement pattern
#
# supported requirements are for example:
# - 1.6 requires Java 6 (any update) [1.6, 1.6.0_45, 1.6.0_88]
# - 1.6* requires Java 6 (any update) [1.6, 1.6.0_45, 1.6.0_88]
# - 1.6+ requires Java 6 or higher [1.6, 1.6.0_45, 1.8, 9, etc.]
# - 1.6.0 requires Java 6 (any update) [1.6, 1.6.0_45, 1.6.0_88]
# - 1.6.0_45 requires Java 6u45 [1.6.0_45]
# - 1.6.0_45+ requires Java 6u45 or higher [1.6.0_45, 1.6.0_88, 1.8, etc.]
# - 9 requires Java 9 (any update) [9.0.*, 9.1, 9.3, etc.]
# - 9* requires Java 9 (any update) [9.0.*, 9.1, 9.3, etc.]
# - 9+ requires Java 9 or higher [9.0, 9.1, 10, etc.]
# - 9.1 requires Java 9.1 (any update) [9.1.*, 9.1.2, 9.1.13, etc.]
# - 9.1* requires Java 9.1 (any update) [9.1.*, 9.1.2, 9.1.13, etc.]
# - 9.1+ requires Java 9.1 or higher [9.1, 9.2, 10, etc.]
# - 9.1.3 requires Java 9.1.3 [9.1.3]
# - 9.1.3* requires Java 9.1.3 (any update) [9.1.3]
# - 9.1.3+ requires Java 9.1.3 or higher [9.1.3, 9.1.4, 9.2.*, 10, etc.]
# - 10-ea requires Java 10 (early access release)
#
# unsupported requirement patterns are for example:
# - 1.2, 1.3, 1.9 Java 2, 3 are not supported
# - 1.9 Java 9 introduced a new versioning scheme
# - 6u45 known versioning syntax, but unsupported
# - 9-ea*, 9-ea+ early access releases paired with */+
# - 9., 9.*, 9.+ version ending with a .
# - 9.1., 9.1.*, 9.1.+ version ending with a .
# - 9.3.5.6 4 part version number is unsupported
#
# @param1 a Java requirement string ('1.8+')
# @return boolean exit code: 0 (is valid), 1 (is not valid)
################################################################################
function is_valid_requirement_pattern() {local java_req=$1java8pattern='1\\.[4-8](\\.[0-9]+)?(\\.0_[0-9]+)?[*+]?'java9pattern='(9|1[0-9])(-ea|[*+]|(\\.[0-9]+){1,2}[*+]?)?'# test matches either old Java versioning scheme (up to 1.8) or new scheme (starting with 9)if [[ ${java_req} =~ ^(${java8pattern}|${java9pattern})$ ]]; thenreturn 0elsereturn 1fi
}# determine which JVM to use
############################################# default Apple JRE plugin path (< 1.6)
apple_jre_plugin="/Library/Java/Home/bin/java"
apple_jre_version=$(get_java_version_from_cmd "${apple_jre_plugin}")
# default Oracle JRE plugin path (>= 1.7)
oracle_jre_plugin="/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java"
oracle_jre_version=$(get_java_version_from_cmd "${oracle_jre_plugin}")# first check system variable "$JAVA_HOME" -> has precedence over any other System JVM
stub_logger '[JavaSearch] Checking for $JAVA_HOME ...'
if [ -n "$JAVA_HOME" ] ; thenstub_logger "[JavaSearch] ... found JAVA_HOME with value $JAVA_HOME"# PR 26: Allow specifying "$JAVA_HOME" relative to "$AppPackageFolder"# which allows for bundling a custom version of Java inside your app!if [[ $JAVA_HOME == /* ]] ; then# if "$JAVA_HOME" starts with a Slash it's an absolute pathJAVACMD="$JAVA_HOME/bin/java"else# otherwise it's a relative path to "$AppPackageFolder"JAVACMD="$AppPackageFolder/$JAVA_HOME/bin/java"fiJAVACMD_version=$(get_comparable_java_version $(get_java_version_from_cmd "${JAVACMD}"))
elsestub_logger "[JavaSearch] ... didn't found JAVA_HOME"
fi# check for any other or a specific Java version
# also if $JAVA_HOME exists but isn't executable
if [ -z "${JAVACMD}" ] || [ ! -x "${JAVACMD}" ] ; thenstub_logger "[JavaSearch] Checking for JavaVirtualMachines on the system ..."# reset variablesJAVACMD=""JAVACMD_version=""# first check whether JVMVersion string is a valid requirement stringif [ ! -z "${JVMVersion}" ] && ! is_valid_requirement_pattern ${JVMVersion} ; thenMSG_JVMVERSION_REQ_INVALID_EXPANDED=$(printf "${MSG_JVMVERSION_REQ_INVALID}" "${JVMVersion}")# log exit causestub_logger "[EXIT 4] ${MSG_JVMVERSION_REQ_INVALID_EXPANDED}"# display error message with AppleScriptosascript -e "tell application \\"System Events\\" to display dialog \\"${MSG_ERROR_LAUNCHING}\\n\\n${MSG_JVMVERSION_REQ_INVALID_EXPANDED}\\" with title \\"${CFBundleName}\\" buttons {\\" OK \\"} default button 1${DialogWithIcon}"# exit with errorexit 4fi# then check whether JVMMaxVersion string is a valid requirement stringif [ ! -z "${JVMMaxVersion}" ] && ! is_valid_requirement_pattern ${JVMMaxVersion} ; thenMSG_JVMVERSION_REQ_INVALID_EXPANDED=$(printf "${MSG_JVMVERSION_REQ_INVALID}" "${JVMMaxVersion}")# log exit causestub_logger "[EXIT 5] ${MSG_JVMVERSION_REQ_INVALID_EXPANDED}"# display error message with AppleScriptosascript -e "tell application \\"System Events\\" to display dialog \\"${MSG_ERROR_LAUNCHING}\\n\\n${MSG_JVMVERSION_REQ_INVALID_EXPANDED}\\" with title \\"${CFBundleName}\\" buttons {\\" OK \\"} default button 1${DialogWithIcon}"# exit with errorexit 5fi# find installed JavaVirtualMachines (JDK + JRE)allJVMs=()# read JDK's from '/usr/libexec/java_home -V' commandwhile read -r line; doversion=$(echo $line | awk -F $',' '{print $1;}')path=$(echo $line | awk -F $'" ' '{print $2;}')path+="/bin/java"allJVMs+=("$version:$path")done < <(/usr/libexec/java_home -V 2>&1 | grep '^[[:space:]]')# unset while loop variablesunset version path# add Apple JRE if availableif [ -x "${apple_jre_plugin}" ] ; thenallJVMs+=("$apple_jre_version:$apple_jre_plugin")fi# add Oracle JRE if availableif [ -x "${oracle_jre_plugin}" ] ; thenallJVMs+=("$oracle_jre_version:$oracle_jre_plugin")fi# debug outputfor i in "${allJVMs[@]}"dostub_logger "[JavaSearch] ... found JVM: $i"done# determine JVMs matching the min/max version requirementminC=$(get_comparable_java_version ${JVMVersion})maxC=$(get_comparable_java_version ${JVMMaxVersion})matchingJVMs=()for i in "${allJVMs[@]}"do# split JVM string at ':' delimiter to retain spaces in $path substringIFS=: arr=($i) ; unset IFS# [0] JVM version numberver=${arr[0]}# comparable JVM version numbercomp=$(get_comparable_java_version $ver)# [1] JVM pathpath="${arr[1]}"# construct string item for adding to the "matchingJVMs" arrayitem="$comp:$ver:$path"# pre-requisite: current version number needs to be greater than min version numberif [ "$comp" -ge "$minC" ] ; then# perform max version checks if max version requirement is presentif [ ! -z ${JVMMaxVersion} ] ; then# max version requirement ends with '*' modifierif [[ ${JVMMaxVersion} == *\\* ]] ; then# use the '*' modifier from the max version string as wildcard for a 'starts with' comparison# and check whether the current version number starts with the max version wildcard stringif [[ ${ver} == ${JVMMaxVersion} ]]; thenmatchingJVMs+=("$item")# or whether the current comparable version is lower than the comparable max versionelif [ "$comp" -le "$maxC" ] ; thenmatchingJVMs+=("$item")fi# max version requirement ends with '+' modifier -> always add this version if it's greater than $min# because a max requirement with + modifier doesn't make senseelif [[ ${JVMMaxVersion} == *+ ]] ; thenmatchingJVMs+=("$item")# matches 6 zeros at the end of the max version string (e.g. for 1.8, 9)# -> then the max version string should be treated like with a '*' modifier at the end#elif [[ ${maxC} =~ ^[0-9]{2}0{6}$ ]] && [ "$comp" -le $(( ${maxC#0} + 999 )) ] ; then# matchingJVMs+=("$item")# matches 3 zeros at the end of the max version string (e.g. for 9.1, 10.3)# -> then the max version string should be treated like with a '*' modifier at the end#elif [[ ${maxC} =~ ^[0-9]{5}0{3}$ ]] && [ "$comp" -le "${maxC}" ] ; then# matchingJVMs+=("$item")# matches standard requirements without modifierelif [ "$comp" -le "$maxC" ]; thenmatchingJVMs+=("$item")fi# no max version requirement:# min version requirement ends with '+' modifier# -> always add the current version because it's greater than $minelif [[ ${JVMVersion} == *+ ]] ; thenmatchingJVMs+=("$item")# min version requirement ends with '*' modifier# -> use the '*' modifier from the min version string as wildcard for a 'starts with' comparison# and check whether the current version number starts with the min version wildcard stringelif [[ ${JVMVersion} == *\\* ]] ; thenif [[ ${ver} == ${JVMVersion} ]] ; thenmatchingJVMs+=("$item")fi# compare the min version against the current version with an additional * wildcard for a 'starts with' comparison# -> e.g. add 1.8.0_44 when the requirement is 1.8elif [[ ${ver} == ${JVMVersion}* ]] ; thenmatchingJVMs+=("$item")fifidone# unset for loop variablesunset arr ver comp path item# debug outputfor i in "${matchingJVMs[@]}"dostub_logger "[JavaSearch] ... ... matches all requirements: $i"done# sort the matching JavaVirtualMachines by version number# https://stackoverflow.com/a/11789688/1128689IFS=$'\\n' matchingJVMs=($(sort -nr <<<"${matchingJVMs[*]}"))unset IFS# get the highest matching JVMfor ((i = 0; i < ${#matchingJVMs[@]}; i++));do# split JVM string at ':' delimiter to retain spaces in $path substringIFS=: arr=(${matchingJVMs[$i]}) ; unset IFS# [0] comparable JVM version numbercomp=${arr[0]}# [1] JVM version numberver=${arr[1]}# [2] JVM pathpath="${arr[2]}"# use current value as JAVACMD if it's executableif [ -x "$path" ] ; thenJAVACMD="$path"JAVACMD_version=$compbreakfidone# unset for loop variablesunset arr comp ver path
fi# log the Java Command and the extracted version number
stub_logger "[JavaCommand] '$JAVACMD'"
stub_logger "[JavaVersion] $(get_java_version_from_cmd "${JAVACMD}")${JAVACMD_version:+ / $JAVACMD_version}"if [ -z "${JAVACMD}" ] || [ ! -x "${JAVACMD}" ] ; then# different error messages when a specific JVM was requiredif [ ! -z "${JVMVersion}" ] ; then# display human readable java version (#28)java_version_hr=$(echo ${JVMVersion} | sed -E 's/^1\\.([0-9+*]+)$/ \\1/g' | sed "s/+/ ${MSG_JAVA_VERSION_OR_LATER}/;s/*/ ${MSG_JAVA_VERSION_LATEST}/")MSG_NO_SUITABLE_JAVA_EXPANDED=$(printf "${MSG_NO_SUITABLE_JAVA}" "${java_version_hr}").if [ ! -z "${JVMMaxVersion}" ] ; thenjava_version_hr=$(extract_java_major_version ${JVMVersion})java_version_max_hr=$(echo ${JVMMaxVersion} | sed -E 's/^1\\.([0-9+*]+)$/ \\1/g' | sed "s/+//;s/*/ ${MSG_JAVA_VERSION_LATEST}/")MSG_NO_SUITABLE_JAVA_EXPANDED="$(printf "${MSG_NO_SUITABLE_JAVA}" "${java_version_hr}") $(printf "${MSG_JAVA_VERSION_MAX}" "${java_version_max_hr}")"fi# log exit causestub_logger "[EXIT 3] ${MSG_NO_SUITABLE_JAVA_EXPANDED}"# display error message with AppleScriptosascript -e "tell application \\"System Events\\" to display dialog \\"${MSG_ERROR_LAUNCHING}\\n\\n${MSG_NO_SUITABLE_JAVA_EXPANDED}\\n${MSG_NO_SUITABLE_JAVA_CHECK}\\" with title \\"${CFBundleName}\\" buttons {\\" OK \\", \\"${MSG_VISIT_JAVA_DOT_COM}\\", \\"${MSG_VISIT_ADOPTOPENJDK}\\"} default button 1${DialogWithIcon}" \\-e "set response to button returned of the result" \\-e "if response is \\"${MSG_VISIT_JAVA_DOT_COM}\\" then open location \\"https://www.java.com/download/\\"" \\-e "if response is \\"${MSG_VISIT_ADOPTOPENJDK}\\" then open location \\"https://adoptopenjdk.net/releases.html\\""# exit with errorexit 3else# log exit causestub_logger "[EXIT 1] ${MSG_ERROR_LAUNCHING}"# display error message with AppleScriptosascript -e "tell application \\"System Events\\" to display dialog \\"${MSG_ERROR_LAUNCHING}\\n\\n${MSG_INSTALL_JAVA}\\" with title \\"${CFBundleName}\\" buttons {\\"${MSG_LATER}\\", \\"${MSG_VISIT_JAVA_DOT_COM}\\", \\"${MSG_VISIT_ADOPTOPENJDK}\\"} default button 1${DialogWithIcon}" \\-e "set response to button returned of the result" \\-e "if response is \\"${MSG_VISIT_JAVA_DOT_COM}\\" then open location \\"https://www.java.com/download/\\"" \\-e "if response is \\"${MSG_VISIT_ADOPTOPENJDK}\\" then open location \\"https://adoptopenjdk.net/releases.html\\""# exit with errorexit 1fi
fi# MainClass check
############################################if [ -z "${JVMMainClass}" ]; then# log exit causestub_logger "[EXIT 2] ${MSG_MISSING_MAINCLASS}"# display error message with AppleScriptosascript -e "tell application \\"System Events\\" to display dialog \\"${MSG_ERROR_LAUNCHING}\\n\\n${MSG_MISSING_MAINCLASS}\\" with title \\"${CFBundleName}\\" buttons {\\" OK \\"} default button 1${DialogWithIcon}"# exit with errorexit 2
fi# execute $JAVACMD and do some preparation
############################################# enable drag&drop to the dock icon
export CFProcessPath="$0"# remove Apples ProcessSerialNumber from passthru arguments (#39)
if [[ "$*" == -psn* ]] ; thenArgsPassthru=()
elseArgsPassthru=("$@")
fi# change to Working Directory based upon Apple/Oracle Plist info
cd "${WorkingDirectory}" || exit 13
stub_logger "[WorkingDirectory] ${WorkingDirectory}"# execute Java and set
# - classpath
# - splash image
# - dock icon
# - app name
# - JVM options / properties (-D)
# - JVM default options (-X)
# - main class
# - main class arguments
# - passthrough arguments from Terminal or Drag'n'Drop to Finder icon
stub_logger "[Exec] \\"$JAVACMD\\" -cp \\"${JVMClassPath}\\" -splash:\\"${ResourcesFolder}/${JVMSplashFile}\\" -Xdock:icon=\\"${ResourcesFolder}/${CFBundleIconFile}\\" -Xdock:name=\\"${CFBundleName}\\" ${JVMOptionsArr:+$(printf "'%s' " "${JVMOptionsArr[@]}") }${JVMDefaultOptions:+$JVMDefaultOptions }${JVMMainClass}${MainArgsArr:+ $(printf "'%s' " "${MainArgsArr[@]}")}${ArgsPassthru:+ $(printf "'%s' " "${ArgsPassthru[@]}")}"
exec "${JAVACMD}" \\-cp "${JVMClassPath}" \\-splash:"${ResourcesFolder}/${JVMSplashFile}" \\-Xdock:icon="${ResourcesFolder}/${CFBundleIconFile}" \\-Xdock:name="${CFBundleName}" \\${JVMOptionsArr:+"${JVMOptionsArr[@]}" }\\${JVMDefaultOptions:+$JVMDefaultOptions }\\"${JVMMainClass}"\\${MainArgsArr:+ "${MainArgsArr[@]}"}\\${ArgsPassthru:+ "${ArgsPassthru[@]}"}
二、开使用JD-GUI工具
1.点击左上角的文件夹图标
2.将包含.class文件的文件夹拖到该区域，注意这里将文件夹拖入才可以哦！！！例如本例中将文件夹mashibing拖到框内：
3.选择一个.class文件打开，例如本例中选中TestJava.class文件，你也可以随意选中一个文件打开都行，不一定是.class格式，然后点击右下角打开按钮：
4.可以看到左边是文件夹目录栏，右边就是.class反编译后的内容，如果本来就是.java文件，就不会备反编译：
可以看出来，.java文件被编译成.class文件后，我们的注释和空格都被去掉了，所以反编译出来的内容也不包含注释和空格。