Caused by: java.lang.SecurityException: class "com.microsoft.sqlserver.jdbc.ISQLServerStatement$$FastClassByProxool$$3407f37e"'s signer information does not match signer information of other classes in the same package
解决办法:用压缩软件打开sqljdbc4.jar 删除META-INFO目录下的检验文件MANIFEST.MF MSFTSIGN.RSA,MSFTSIG.SF即可