cos重命名 jsp+cos上传文件

package org.sxf.upload; import java.io.File; import java.util.Date; import com.oreilly.servlet.multipart.FileRenamePolicy; public class RandomFileRename implements FileRenamePolicy { public File rename(File file) { // TODO Auto-generated method stub String body=""; String ext=""; int pot=file.getName().lastIndexOf("."); if(pot!=-1){ body=(new Date()).getTime()+""; ext=file.getName().substring(pot); }else{ body=(new Date()).getTime()+""; ext=""; } String newName=body+ext; file=new File(file.getParent(),newName); return file; } }