Question

I am facing a problem in running a jar file from my servlet.
I have to run a jar file of another java application with arguments in a separate sevlet in web project in Eclipse.

I use the code as

Runtime.getRuntime().exec("java -jar myproject.jar param1 param2 abc.xml");

In above code, on running the above jar file with parameters param1 and param2 , it will store output in abc.xml.
But the problem is that i dont know how to give the path of myproject.jar in code.

I copied myproject.jar to the project directory and it does not give any output.
I have tried to use
I dont know how to give path of jar file and where to put the jar file and where the out put file will come .

This code works fine with simple core java application where i put my myproject.jar file in the core java project directory and the output file abc.xml is created in the core java project directory.

Please guide me.
Thanks in advance.

Answer 1

This is not the right way of invoking Java code contained in some JAR in the classpath (I assume that you have placed it in /WEB-INF/lib). Just import and invoke the code contained in that JAR file directly.

import com.packagefromjar.SomeMainClassInJar;

// ...

SomeMainClassInJar.main(new String[] { "param1", "param2", "/path/to/abc.xml" });

Or if that API is well designed, then just use its entry classes directly instead of calling a main() method.