一个JAVA的文件分割器，可以把一个文件分成N份，并且还可以整合，以后可以利用它把文件分好后存在自己的邮件里啦-JAVA partition a document, you can put a file into N copies, and also can be integrated, then you can use it to document the existence of its own after a good e-mail you. . .