在MyEclipse安装目录下打开configurationorg.eclipse.equinox.simpleconfiguratorundles.info 搜索derby找到com.genuitec.eclipse.derby,11.0.0.me201305151620,plugins/com.genuitec.eclipse.derby_11.0.0.me201305151620.jar,4,false
把它注释掉即（#com.genuitec.eclipse.derby,11.0.0.me201305151620,plugins/com.genuitec.eclipse.derby_11.0.0.me201305151620.jar,4,false