jsp文件下载相关代码

function mydownload(filename, downloadlocation){
var downloadform = document.createElement("FORM");
            document.body.appendChild(downloadform);
            downloadform.method = "post";
            createNewFormElement(downloadform, "filename", filename);
            createNewFormElement(downloadform, "downloadlocation", downloadlocation);
            downloadform.action = "<%=base %>/downloadAction.do";
            downloadform.target = "_self";
            downloadform.submit();
            }


function createNewFormElement(inputForm, elementName, elementValue)
         {
var newElement = document.createElement("input");
         newElement.setAttribute("name",elementName);
         newElement.setAttribute("type","hidden");
         newElement.setAttribute("value",elementValue);
         inputForm.appendChild(newElement);
return newElement;
         }

FileInputStream fis = null;
        OutputStream ops = null;

try {
            fis = new FileInputStream(downloadlocation);

            reponse.reset();
            reponse.setContentType("application/x-download");
            reponse.setHeader("Content-Disposition", "attachment;filename=" + filename);

            ops = reponse.getOutputStream();

byte[] buffer = new byte[1024];
int count = 0;

while((count = fis.read(buffer)) > 0){
                ops.write(buffer, 0, count);
            }

            ops.flush();

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally{
if(fis != null){
try {
                    fis.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

if(ops != null){
try {
                    ops.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }

界面及后台相关代码--