说明：  这是在jsp+javabean模式下，一个上传图片的jsp，该项目是北京市建委办公自动化项目，该程序也可以应用在其他的项目中来上传图片。
(This is the jsp javabean mode, upload pictures of a jsp. The project is the Beijing Construction Committee office automation project, the procedures can also be applied to other projects to upload pictures.)