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Old July 1st, 2009, 01:47 AM
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Talking Unable to display images from servlets into jsp

Hello, I am peggie. Currently, I am using eclipse with Tomcat 6.0.18. And my database is created using mysql query browser:)

However the problem is in my jsp page it display a default box that have no picture that I had inserted to the datbase on it.

My code for creating this are:

Code:
package sg.nyp.edu.sit; import java.sql.Blob; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement;
import java.io.IOException; import java.io.InputStream;
import javax.servlet.ServletException; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;
/** * Servlet implementation class DisplayBlobExample */ public class DisplayBlobExample extends HttpServlet { private static final long serialVersionUID = 1L;
/** * @see HttpServlet#HttpServlet() */ public DisplayBlobExample() { super(); // TODO Auto-generated constructor stub }
/** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub Blob image = null; Connection con = null; Statement stm = null; ResultSet rs = null; ServletOutputStream out = response.getOutputStream(); try { Class.forName("com.mysql.jdbc.Driver"); con = DriverManager.getConnection("jdbc:mysql://localhost/images"); stm = con.createStatement(); rs = stm.executeQuery("select image from picture where pictureid = '2'"); if (rs.next()){ image = rs.getBlob(1); } else{ response.setContentType("TEXT/HTML"); out.println("<html><head><title>Display out the blob image</title></head>"); out.println("<body><h4><font color = 'red'>Image not founde for the given id</font></h4></body></html>"); return; } response.setContentType("http://p2p.wrox.com/images/jpg"); InputStream in = image.getBinaryStream(); int length = (int) image.length(); int bufferSize = 1024; byte[] buffer = new byte[bufferSize]; while ((length = in.read(buffer)) != -1) { out.write(buffer, 0, length); } in.close(); out.flush();
} catch (Exception e){ response.setContentType("TEXT/HTML"); out.println("<html><head><title>Unable To Display image</title></head>"); out.println("<body><h4><font color='red'>Image Display Error=" + e.getMessage() + "</font></h4></body></html>"); return;
} finally { try{ rs.close(); stm.close(); con.close(); } catch (SQLException e) { e.printStackTrace();
} }
}
/** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub }
}
My java class for getter and setter are:
Code:
package sg.nyp.edu.sit.model;
import java.sql.Blob;
public class Image { int pictureid; Blob image; public int getPictureid() { return pictureid; } public void setPictureid(int pictureid) { this.pictureid = pictureid; } public Blob getImage() { return image; } public void setImage(Blob image) { this.image = image; }
}
And my jsp page is for calling out the image from servlet is:
Code:
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>Insert title here</title> </head> <body> <form method="get"> <img src="/DisplayBlobExample"/> </form>
</body>
</html>
my database is called:
picture.
The attributes are:
pictureid (int)
image(blob)

Thanks:D
Hope to receive u guys reply soon
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