specifying log4j in classpath

问题

I believe this is how I can compile and run a file that uses external library. I'm using Windows.

top level directory
|
|-log4-1.2.17.jar
|-MyApp.java
|-com
     |-foo
          |-Bar.java

Compiling

javac -cp log4j-1.2.17.jar;. com\foo\Bar.java
javac -cp log4j-1.2.17.jar;"com\foo";. MyApp.java

Executing

java -cp log4j-1.2.17.jar;"com\foo";. MyApp

Compiling itself failed.

回答1:

simple batch script, for compiling all your project

set COMPILED_CLASSES=.\
set TEMP_FILE=temp
dir .\*.java /s /B > %TEMP_FILE%
javac -classpath log4j-1.2.17.jar;%COMPILED_CLASSES% -d %COMPILED_CLASSES% @%TEMP_FILE%
rm %TEMP_FILE%

add it to top level dir and run
EDIT
step by step

javac ./com/foo/Bar.java -classpath log4j-1.2.17.jar

javac ./MyApp.java -classpath log4j-1.2.17.jar;./

run

java -classpath log4j-1.2.17.jar;./ MyApp

回答2:

Include current directory in java classpath

java -cp log4j-1.2.17.jar;. MyApp

Why do you have to include current directory:

The default class path is the current directory. Setting the CLASSPATH variable or using the -classpath command-line option overrides that default, so if you want to include the current directory in the search path, you must include "." in the new settings.

回答3:

Y need to include the local directory. If you want to do it in the current directory it would be something like:

javac -cp .;log4j-1.2.17.jar Bar

来源：https://stackoverflow.com/questions/12262015/specifying-log4j-in-classpath

标签

java

jar

classpath