ntext.getrealpath("");

fileoutputstream out = new fileoutputstream(path+"/uploadv/"+video_name);

out.write(file.getfiledata());

out.flush();

out.close();

uploadmanager ulm = new uploadmanager();

boolean flag = ulm.videoadd(video_name, video_time);

if(flag){

request.setattribute("currenttime", new date());

request.setattribute("upload", "success");

return mapping.findforward("upload");

}

request.setattribute("upload", "fail");

return mapping.findforward("auploadv");

path表示得到当前项目下webroot 的路径，为了保存视频，在webroot下建立了一个名为uploadv的文件夹，把视频保存在tomcat服务器下。同时为避免出现相同文件名的视频名字，每个视频上传之前在视频名前加了一段唯一的uuid字符编码，对应数据可存入tb_video表中的video_name字段，将来在显示视频的详细信息时同样根据video_name来寻找视频。

学生下载视频，用video_name查找下载视频。下载视频的代码如下：

uploadform ulf = (uploadform)form;

string video_name = ulf.getvideo_name();

video_name = new string(video_name.getbytes("iso-8859-1"),"gb18030");

servletcontext servletcontext = this.getservlet().getservletcontext();

string path = servletcontext.getrealpath("");

fileinputstream input = new fileinputstream(path+"/uploadv/"+video_name);

response.setcontenttype("application/x-msdownload");

response.setheader("content-disposition", "attachment; filename=" + new string(video_name.getbytes("gb18030"),"iso-8859-1"));

outputstream out = response.getoutputstream();

byte[] b = new byte[1024*1024];

while(input.read(b)>0){

out.write(b);

out.flush();

}

input.close();

out.close();

教师可以根据video_name删除某些视频,调用delvideo()方法将相关信息删除。关键代码如下：

uploadform ulf = (uploadform)form;

string video_name = ulf.getvideo_name();

servletcontext servletcontext = this.getservlet().getservletcontext();

string path = servletcontext.getrealpath("");

file filename = new file(path+"/uploadv/"+video_name);

filename.delete();

uploadmanager um = new upl

上一页  [1] [2] [3] [4] [5] [6] [7] [8] [9] [10]  ... 下一页  >>