I have a bunch of libraries in Jar format located in .\lib.
When I am trying to launch the program.
I cannot have
java myprogram -cp ./lib
instead I have to type every single files
java myprogram -cp ./lib/a.jar;./lib/b.jar...
Besides typing manually, are there productivity tips to construct very long classpath?
You sould create a shell or batch script that takes a list of directories as input, finds all the jar files in those directories, and concats them together into a classpath.
Or you could pass the directories to your Java progam at startup, and then in your program use a java.io.File to scan the directories for jar files and add those jar files to a [url http://java.sun.com/j2se/1.5.0/docs/api/java/net/URLClassLoader.html]URLCassLoader[/url].
All of the examples I've found don't deal with paths with space very well. Here's an example to solve the problem:
Create a batch file to launch your java app or setup your environment. It's contents will look something like:
@echo off
REM $Id: $
REM Setup the APP environment
REM ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
REM APP_HOME assumes that your batch file is in APP_HOME\bin.
REM If your batch file is in APP_HOME change the next line to 'SET APP_HOME=%~dp0'
SET APP_HOME=%~dp0..
SET APP_LIB=%APP_HOME%\lib
SET APP_CLASSPATH=
FOR %%i IN ("%APP_LIB%\*.jar") DO CALL cpappend.bat %%i
Create a second batch file name cpappend.bat. It's contents will be:
rem
rem Append to APP_CLASSPATH
rem
rem $Id: $
rem
SET _TEMP=
REM Process the first argument
IF ""%1"" == """" GOTO end
SET _TEMP=%1
SHIFT
REM Process the remaining arguments. Paths with spaces are handled here
:setArgs
IF ""%1"" == """" GOTO doneSetArgs
SET _TEMP=%_TEMP% %1
SHIFT
GOTO setArgs
REM Build the classpath
:doneSetArgs
SET APP_CLASSPATH=%APP_CLASSPATH%;"%_TEMP%"
GOTO end
:end
Message was edited by:
hohonuuli
Message was edited by:
hohonuuli
