我有导入org.apache.commons.io.FileUtils; 在我的代码中，它适用于eclipse但不适用于命令行

Question

I'm using an Apache package; I've add it's jar file location to the classpath environment variable. When I try to compile the code via the command line I get numerous errors including: package org.apache.commons.io does not exist

Answer 1

You are missing the jar that contains this package (in your case apache-commons.jar) on your classpath.

Try to export the packaged jar file with the dependend jars included. That should work.

Answer 2

Complile like this:

javac -cp .:common-io-xx.jar YourProgram.java

Run it like this:

java -cp .:common-io-xx.jar YourProgram

Answer 3

Actually the above option will not work sometimes.

At run time it might not find the class YourProgram :( Strange but true!

In that case just drop common-io-xx.jar under your ...\\Java\\jdk1\\jre\\lib\\ext

Ofcourse that will work :) Only wasted a few hours to get to that conclusion!