Code1
public void mDownload()2
{3
try4
{5
Map params = FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap();6
String documentId = (String)params.get("documentId");7
if(main.isNum(documentId)==true)8
{9
Query query = main.session.getNamedQuery("upload.selectFileById");10
query.setParameter("id", documentId);11
List list = query.list();12
String userId,oldName,fileName;13
if(list.size()>0)14
{15
Object obj[] = (Object[])list.get(0);16
userId = String.valueOf(obj[0]);17
oldName = String.valueOf(obj[1]);18
fileName = String.valueOf(obj[2]);19
//20
if(main.getFileType(oldName).equals(".nothing"))21
oldName = oldName + main.getFileType(fileName);22
//get the OS name23
String osName = System.getProperty("os.name");24
String storedir = "";25
if(osName == null)26
osName="";27
if(osName.toLowerCase().indexOf("win") != -1)28
storedir = url + userId + "\\";29
else30
storedir = url2 + userId + "/";31
FacesContext ctx = FacesContext.getCurrentInstance();32
ctx.responseComplete();33
//String contentType = "application/octet-stream;charset=utf-8";34
String contentType = "application/x-download";35
HttpServletResponse response = (HttpServletResponse) ctx.getExternalContext().getResponse();36
response.setContentType(contentType);37
StringBuffer contentDisposition = new StringBuffer();38
contentDisposition.append("attachment;");39
contentDisposition.append("filename=\"");40
contentDisposition.append(oldName);41
contentDisposition.append("\"");42
response.setHeader("Content-Disposition", new String(contentDisposition.toString().getBytes(System.getProperty("file.encoding")),"iso8859_1"));43
ServletOutputStream out = response.getOutputStream();44
byte[] bytes = new byte[0xffff];45
InputStream is = new FileInputStream(new File(storedir + fileName));46
int b = 0;47
while ((b = is.read(bytes, 0, 0xffff)) > 0)48
{49
out.write(bytes, 0, b);50
}51
is.close();52
ctx.responseComplete();53
} 54
}55
}catch (Exception ex){ex.printStackTrace();}56
}