Java 用命令行覆盖依赖

Question

i'am building a jarfile whith maven. my question is,how to override a dependency with command line during jar execution.

here is my command line

java -Djava.library.path="C:\Users\param" -jar Test-1.0-SNAPSHOT-jar-with-dependencies.jar

thanks

Answer 1

You can't. When using the -jar option, the class path is controlled by the Class-Path entry in the manifest, and you cannot change it. The only ways to change it while still using -jar is by either modifying the manifest, or replacing the jar file referenced by the manfifest.

Another alternative is to not use -jar , but instead use -cp to specify the class path (you will need to specify all dependencies yourself,). and explicitly specify the main class.