Setting The Content Type In Java

In most cases servlets are used to generate and serve HTML pages. However, servlets can serve any type of data including images, plain text, PDFs, spreadsheets, Javascript code, etc. To do this, the servlet must declare the type of content being served to the web browser. This declaration is called the content type or the media type of the file.

Here’s how to set the content type of a servlet’s response. The variable resp represents a javax.servlet.http.HttpServletResponse object:


Put the appropriate content type in the content_type variable. Some common content types are text/html(for HTML pages), text/plain (plain text), application/javascript (JS code), application/ (Excel spreadsheets), image/jpeg (JPEG images), application/pdf (PDFs); the list goes on and on. If you need to figure out the appropriate content type for your data, look it up on the Wikipedia Internet Media Types list.