SAP Hybris install.bat工作原理分析

以Windows平台為例，install.bat的内容：

@echo off

SET INSTALLER_WORKING_DIR=%~dp0

javac %INSTALLER_WORKING_DIR:~0,-1%\JavaVersionChecker.java

java -classpath "%INSTALLER_WORKING_DIR:~0,-1%" JavaVersionChecker

IF errorlevel 0 (

java -classpath ";%INSTALLER_WORKING_DIR:~0,-1%/libs/commons-cli-1.2.jar;%INSTALLER_WORKING_DIR:~0,-1%/libs/commons-lang-2.6.jar;%INSTALLER_WORKING_DIR:~0,-1%/libs/groovy-all-2.4.10.jar;%INSTALLER_WORKING_DIR:~0,-1%/libs/installer-6.7.0.3.jar" de.hybris.installer.CmdHandler %*

)

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SET INSTALLER_WORKING_DIR=%~dp0: 将變量INSTALLER_WORKING_DIR的值設定為install.bat檔案所在的目錄，比如C:\Code\hybris670\installer

相當于執行：javac C:\Code\hybris670\installer\JavaVersionChecker.java

java -classpath “%INSTALLER_WORKING_DIR:~0,-1%” JavaVersionChecker

相當于執行：

java -classpath “C:\Code\hybris670\installer” JavaVersionChecker

java -classpath “;%INSTALLER_WORKING_DIR:0,-1%/libs/commons-cli-1.2.jar;%INSTALLER_WORKING_DIR:0,-1%/libs/commons-lang-2.6.jar;%INSTALLER_WORKING_DIR:0,-1%/libs/groovy-all-2.4.10.jar;%INSTALLER_WORKING_DIR:0,-1%/libs/installer-6.7.0.3.jar” de.hybris.installer.CmdHandler %*: 執行libs檔案夾裡的jar包進行安裝