Use JSP to directly download files

<%

// Sometimes the user wants to download the file, but the file type is associated with the browser in the system, and the result is opened in IE.

// Common examples include Word, Excel, and PDF. Therefore, converting a file into a data stream allows the browser to download the file without knowing its file type.

// Example:

// <A href = "Download. jsp? Path = img/&name=test.gif "> download image </a>

String root = getservletcontext (). getrealpath ("/");

String Path = request. getparameter ("path ");

String name = request. getparameter ("name ");

Response. setcontenttype ("unknown ");

// Note: If attachment is removed from the following line of code, ie will automatically open the file.

Response. addheader ("content-disposition", "attachment; filename =/" "+ name + "/"");

Try

{

Java. Io. outputstream OS = response. getoutputstream ();

Java. Io. fileinputstream FCM = new java. Io. fileinputstream (root + path + name );

Byte [] B = new byte [1024];

Int I = 0;

While (I = FCM. Read (B)> 0)

{

OS. Write (B, 0, I );

}

FCM. Close ();

OS. Flush ();

OS. Close ();

}

Catch (exception E)

{}

%>