视频下载：
前台 jsp function downVideo(value,row,index){ return ‘<a href="http://www.mamicode.com/admin/video/video!fileDown.ds?uname=‘+row.uname+‘&filepath=‘+value+‘">下载</a>‘;}后台java ：action： public void fileDown() {   FileUtil.download(filepath, getRequest().getParameter("uname")+filepath.substring(filepath.lastIndexOf("."),filepath.length()), getResponse());  }FileUtil：public static void download(String filepath, String filename, HttpServletResponse response) {        response.setContentType("application/x-download;charset=utf-8");        OutputStream outp = null;        FileInputStream in = null;        try {            response.addHeader("Content-Disposition", "attachment;filename="+new String(filename.getBytes("gbk"),"ISO-8859-1"));                     in = new FileInputStream(ServletActionContext.getServletContext().getRealPath("/")+filepath);            outp = response.getOutputStream();        } catch (UnsupportedEncodingException e1) {            e1.printStackTrace();        } catch (FileNotFoundException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }        byte[] b = new byte[1024];        int i = 0;        try {            while ((i = in.read(b, 0, 1024)) != -1) {                outp.write(b, 0, i);                outp.flush();            }                 } catch (IOException e) {            e.printStackTrace();        } finally {            if (in != null) {                try {                    in.close();                } catch (IOException e) {                    e.printStackTrace();                }                in = null;            }            if (outp != null) {                outp = null;            }        }    }

在tomcat servlet.xml里面 第69行加上 URIEncoding="UTF-8"    <Connector port="8080" protocol="HTTP/1.1"   URIEncoding="UTF-8"               connectionTimeout="20000"               redirectPort="8443" />

<form id="financialForm" action="<%=basePath%>riskcontrol/website/review_borrow!financialUplaod.ds"  method="post"  enctype="multipart/form-data" onsubmit="return checkusertype()" >         <input type="hidden" name="usreId" value="<%=_usreId%>" />         <input type="hidden" name="borrowId" value="<%=_borrowId%>" />         <input type="file" name="image" multiple="multiple" id="financialImages"/>         <input type="submit" value="开始上传"/>    </form>

<script type="text/javascript"> function checkusertype(){   var usertype="${login_session_key.userType}";   if(!(usertype==2||usertype==11)){    alert("只有财务风控或者 总部客服可以上传复审材料");    return false;   }else{    return submitFile();   } } function submitFile(){   var fileArr = document.getElementById("financialImages").files;    if(fileArr.length==0){     alert(‘请选择上传的图片!‘);     return false;    }   for( var i=0;i<fileArr.length;i++){   var imageName=fileArr[i].name;      var extStart=imageName.lastIndexOf(".");      var ext=imageName.substring(extStart,imageName.length).toUpperCase();      if(ext!=".PNG"&&ext!=".JPEG"&&ext!=".JPG"&&ext!=".BMP"){                   alert("图片限于PNG,JPEG,JPG,BHMP格式");                     return false;                }       var filesize = fileArr[i].size/1024;       if(parseInt(filesize)>300){        alert(‘图片不能大于300KB‘);        return false;       }     //  $(‘#financialForm‘).submit();   }  }</script>