这个是环境变量配置问题吗？

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/collections/map/ListOrderedMap

at net.sf.json.JSONObject.<init>(JSONObject.java:1450)

at net.sf.json.util.CycleDetectionStrategy.<clinit>(CycleDetectionStrategy.java:37)

at net.sf.json.JsonConfig.<clinit>(JsonConfig.java:65)

at net.sf.json.JSONObject.fromObject(JSONObject.java:134)

at wx.WeixinUtil.doGetStr(WeixinUtil.java:37)

at wx.WeixinUtil.getAccessToken(WeixinUtil.java:73)

at test.WeixinTest.main(WeixinTest.java:9)

Caused by: java.lang.ClassNotFoundException: org.apache.commons.collections.map.ListOrderedMap

at java.net.URLClassLoader$1.run(URLClassLoader.java:372)

at java.net.URLClassLoader$1.run(URLClassLoader.java:361)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(URLClassLoader.java:360)

at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)

at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

... 7 more