（1）realUploadPath:硬盘物理地址:

G:\javaweb\apache-tomcat-8.0.43\webapps\PersonalBlog\upload

 (2)uploadPath:网络地址http://localhost:8080/PersonalBlog/upload

                     硬盘物理地址:

输出以下地址：

String des=realUploadPath+"/"+Long.toString(imgName)+file.getOriginalFilename();

System.out.println(des);

结果：

G:\javaweb\apache-tomcat-8.0.43\webapps\PersonalBlog\upload/1495019799100738808AB094711A84DB1A4FA3F1452F3.jpg

                         网络地址

输出以下地址：

System.out.println(uploadPath + "/"+Long.toString(imgName)+file.getOriginalFilename());