公司有个项目接受，结果导入到eclipse里面发现无法运行junit单元测试。总报错：
Caused by: org.apache.commons.discovery.DiscoveryException: No implementation defined for org.apache.commons.logging.LogFactory
at org.apache.commons.discovery.tools.DiscoverClass.find(DiscoverClass.java:404)
at org.apache.commons.discovery.tools.DiscoverClass.newInstance(DiscoverClass.java:579)
at org.apache.commons.discovery.tools.DiscoverSingleton.find(DiscoverSingleton.java:418)
at org.apache.commons.discovery.tools.DiscoverSingleton.find(DiscoverSingleton.java:378)
at org.apache.axis.components.logger.LogFactory$1.run(LogFactory.java:45)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.axis.components.logger.LogFactory.getLogFactory(LogFactory.java:41)
at org.apache.axis.components.logger.LogFactory.<clinit>(LogFactory.java:33)
我的解决办法是在 eclipse 菜单的那个 运行小图片点击器右侧倒三角，选择 run configurations
然后在 JUnit 下面找到刚才运行过的 case ，点击之，在Argument 选项卡，填入vm的参数：
-Dorg.apache.commons.logging.LogFactory="org.apache.commons.logging.impl.LogFactoryImpl"
然后就可以执行 junit 单元测试了。