Unable to execute dex: Multiple dex files define Lorg/apache/commons/collections/FastHashMap;

android在打包的时候出错，昨天晚上还好好的，今天早上起床后打开项目就出错了，网上有很多办法都适合，差距太远

异常代码提示：[2015-03-29 10:08:13 - 农产品推广平台] Dx warning: Ignoring InnerClasses attribute for an anonymous inner class

(org.apache.commons.logging.LogFactory$6) that doesn't come with an

associated EnclosingMethod attribute. This class was probably produced by a

compiler that did not target the modern .class file format. The recommended

solution is to recompile the class from source, using an up-to-date compiler

and without specifying any "-target" type options. The consequence of ignoring

this warning is that reflective operations on this class will incorrectly

indicate that it is *not* an inner class.

[2015-03-29 10:08:15 - Dex Loader] Unable to execute dex: Multiple dex files define Lorg/apache/commons/collections/FastHashMap;
[2015-03-29 10:08:15 - 农产品推广平台] Conversion to Dalvik format failed: Unable to execute dex: Multiple dex files define Lorg/apache/commons/collections/FastHashMap;

然后就导致打包的时候老是出错

解决办法，找所引用的jar包中，所包含的包或者类有没有重复的，删除重复的就可以了

更多解决办法请参考其他文章：http://blog.csdn.net/mxlxiao7/article/details/8978930