dcsimg
Login | Register   
LinkedIn
Google+
Twitter
RSS Feed
Download our iPhone app
TODAY'S HEADLINES  |   ARTICLE ARCHIVE  |   FORUMS  |   TIP BANK
Browse DevX
Sign up for e-mail newsletters from DevX

By submitting your information, you agree that devx.com may send you DevX offers via email, phone and text message, as well as email offers about other products and services that DevX believes may be of interest to you. DevX will process your information in accordance with the Quinstreet Privacy Policy.


Tip of the Day
Language: Java
Expertise: Advanced
Nov 4, 2004

WEBINAR:

On-Demand

Building the Right Environment to Support AI, Machine Learning and Deep Learning


Read an Image from a Database and Show it in a Browser

This script reads the image from the databse and uses JDBC and stream to write it into a browser.

//import the required files
import ...
//class declaration
public class ... extends HttpServlet{
  public void doGet(HttpServletRequest request, HttpServletResponse response)
                               throws ServletException, IOException {
 
  Connection conn = null;
  byte[] buffer = new byte[4 * 1024];  
  int len;  
  try {
      //database connectivity
      DriverManager.registerDriver (new oracle.jdbc.driver.OracleDriver());
      conn = DriverManager.getConnection("jdbc:oracle:thin:@url:1521:omm","uname","pwd"); 
	
      response.setContentType("image/gif");
      //getting stream
      ServletOutputStream out = response.getOutputStream();
      //executing query
      Statement stmt = conn.createStatement();
      //note IMAGE field may be CLOB/BLOB in the database
      ResultSet rs = stmt.executeQuery("SELECT IMAGE FROM table_image WHERE IMAGE_ID = 101") ;
      if (rs.next()) { //reading &writting using stream 
        BufferedInputStream bis = new BufferedInputStream(rs.getBinaryStream("IMAGE"));
        while ((len = bis.read(buffer, 0, buffer.length)) != -1) {
          out.write(buffer, 0, len);
        }
      } 
    }
    catch ( Exception e ) {//exception handling
    }
  
}
}
David Elayaraja
 
Comment and Contribute

 

 

 

 

 


(Maximum characters: 1200). You have 1200 characters left.

 

 

Sitemap
Thanks for your registration, follow us on our social networks to keep up-to-date