网上找的获取文件CRC的类，原来有少许错误已经修改，内附使用示例，直接调用即可。不错的资源和大家一起分享一下-This is a Class I find from the internet.The Class is used to get the file s CRC value. There are some error in the file but I have correct it. It is easy to use and it has example inside. Here I wish to share it with you.