问题
I have a (hopefully) very basic question. I'm very unfamiliar with Ant, I'm just trying to use a build file so I can write some plugins for an open source application I found recently, Rapid Miner. I've been trying to compile it with Eclipse (following Eclipses.org's own instructions on how to do so.) Every time I click Run though I get an error that looks like this:
Buildfile: C:\Users\jcarr14\Eclipse\Workspace\RapidMiner_Unuk\build.xml
[taskdef] Could not load definitions from resource net/sf/antcontrib/antlib.xml. It could not be found.
BUILD FAILED
C:\Users\jcarr14\Eclipse\Workspace\RapidMiner_Unuk\build.xml:329: taskdef class com.oracle.appbundler.AppBundlerTask cannot be found
using the classloader AntClassLoader[]
Total time: 306 milliseconds
It seems to me that there must be a file missing, but I can't figure out where it is supposed to be and as a result, I can't figure out if it is actually there or not, or even if Eclipse is the culprit. I did go into the Eclipse folder and look for a net/sf/antcontrib/antlib.xml, but was unable to locate anything.
I'm assuming that it's possible the problem is not with Eclipse at all, but with Rapid Miner. So I looked for that same location inside of the RapidMiner project structure and was unable to find it. I have also posted a similar question to this one on RapidMiner's forums, just in case this is RapidMiner specific.
I suppose the basic question I need answered is how to check if Ant is installed properly in Eclipse. Once I know that Eclipse is working fine I can then throw all my focus on figuring out what is wrong with RapidMiner...
回答1:
It seems you need to install ant-contrib.
来源：https://stackoverflow.com/questions/15619583/could-not-load-definitions-from-resources