上传文件名乱码的解决

对文件名进行了无数次转码，用gbkToUtf8有时还是会出现乱码，于是又google了一通，终于用以下办法解决了：

DiskFileItemFactory factory = new DiskFileItemFactory();

ServletFileUpload upload = new ServletFileUpload(factory);

upload.setHeaderEncoding("UTF-8");