一个没见过的Exception

[lzt2008]

java.lang.SecurityException: class "org.apache.commons.collections.SequencedHashMap"'s signer information does not match signer information of other classes in the same package
我今天作项目时
发现个这个异常找了一早上了
谁知道说下怎么解决啊
急！

[yucc2008]

The error message say all classes of the same package must have the
same signature.

You can fix it perhaps by moving a class, or my getting a real cert
and using it to sign everything.

我google到的，遇到问题先google、百度下

[lzt2008]

我想知道解决的办法不是翻译
谢谢