从cli运行时，简化在eclipse中创建的Java程序的类路径条目？

Question

I use eclipse as my IDE to save projects onto a samba network drive that I have mapped on my ubuntu home server. I have Eclipse configured to save the jar libraries that I'm using into the /lib folder.

The problem is that when I try to run my java programs from the command line on the server, I always have to type

java -cp .:../lib/* javaclassname

This gets a bit tiresome, especially considering tab-completion won't work with the colon that must be included in the classpath. Is there any way to set things up so I don't have to manually specify the classpath every time?

Answer 1

The easiest option is to let Eclipse build the JAR for you. Right-click on your project, then select Export > Runnable JAR file. The dialog will give you a few options. Select 'Copy required libraries...'. The output will be your main application JAR file, plus a lib folder with your dependencies. In this case, the JAR file manifest will specify the class path, which points to all your dependencies. Running it at the command line then would be as simple as "java -jar myJar.jar".

If you want to automate things, I would start with Ant. I think it will be less of a learning curve than Maven. In this case, check out the jar Ant task .

Answer 2

I ended up solving this by making a shell script called run.sh and putting it in the project's root folder.

run.sh:

#!/bin/bash

LIBS=$(grep '<classpathentry kind="lib" path="' .classpath | sed 's/.*\<classpathentry kind="lib" path="//' | sed 's/\"[^\"]*$//' | tr '\n' ':')

java -cp "bin:$LIBS" $1

You make it executable by running chmod u+x run.sh , then run it with ./run.sh packagename.classname

It reads the .classpath file in the root folder and adds every entry to the colon-separated list on the commandline.