Shulou(Shulou.com)06/02 Report--

This article is about how JSP calls servlet to display pictures. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

In Servlet, we use doGet (), doPost () and other methods to respond to the GET POST method. Here we respond to GET, so we define a doGet () method that follows the source program:

/ / = start of showimage.java program = =

Only when html is called

Import java.io.*

Import java.text.*

Import java.util.*

Import javax.servlet.*

Import javax.servlet.http.*

Public class showimage extends HttpServlet {

Public void doGet (HttpServletRequest req, HttpServletResponse res)

Throws ServletException, IOException

{

Try {

FileInputStream hFile = new FileInputStream ("d:1.gif"); / / Open the file d:1.gif as a byte stream

Int i=hFile.available (); / / get the file size

Byte data [] = new byte [I]

HFile.read (data); / / read data

HFile.close ()

Res.setContentType ("image/*"); / / sets the returned file type

OutputStream toClient=res.getOutputStream (); / / get the object that outputs binary data to the client

ToClient.write (data); / / output data

ToClient.close ()

}

Catch (IOException e) / / error handling

{

PrintWriter toClient = res.getWriter (); / / get the object that outputs the text to the client

Res.setContentType ("text/html;charset=gb2312")

ToClient.write ("cannot open picture!")

ToClient.close ()

}

}

}

/ * end of showimage.java program * /

Thank you for reading! This is the end of the article on "how JSP calls servlet to display pictures". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, you can share it out for more people to see!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.