public static void main(String [] args){
String attachFile="D:\\aaa.txt";
String virtualFileName="";
File file = new File(attachFile);
String suffix = attachFile.substring(attachFile.lastIndexOf("."));
UUID uuid = UUID.randomUUID(); //生成序列号
virtualFileName = uuid.toString();
String path = "D:/apache-tomcat-5.5.20/attachFiles";
virtualFileName = path + File.separator + virtualFileName + suffix;
File targetFile = new File(virtualFileName);
try {
FileUtils.copyFile(file, targetFile);
} catch (IOException e) {
e.printStackTrace();
}
}