java - Is there a common way to download all types of files in jsp?

Question

I want to download office files,pdf files,image files,zip files,dll files,exe files based on the user selection.So, I want to download these file types from jsp page.

This is jsp code snippt:

<% 
String filename = "Sample1.docx"; 
String filepath = "e:\temp"; 
response.setContentType("APPLICATION/OCTET-STREAM"); 
response.setHeader("Content-Disposition","attachment; filename="" + filename + """); 

java.io.FileInputStream fileInputStream = new java.io.FileInputStream(filepath + filename);

int i; 
while ((i=fileInputStream.read()) != -1) {
    out.write(i); 
} 
fileInputStream.close();
%>

But it raising some error when downloading office files, images files.When i open the downloaded files it says "The File may be Corrupted".

Is there any common way to download all types of files in jsp?

Answer 1

Your problem is that the out variable in a JSP is a JspWriter, which is a character stream and so your binary files get altered. You would be much better off using a servlet directly for this particular purpose.