Unable to display out images from SQL Query Browser:(

Peggie1990 · June 29th, 2009, 11:01 AM

Hello, I am peggie. Currently, I am using servlet to display out images on my image.jsp page. However, nothing appears.

This is my servlet code:

Code:

 
package sg.nyp.edu.sit;
import java.sql.*;
import java.io.IOException;
import java.io.InputStream;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
 * Servlet implementation class DisplayImage
 */
public class DisplayImage extends HttpServlet {
 private static final long serialVersionUID = 1L;
    /**
     * Default constructor. 
     */
    public DisplayImage() {
        // 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
  String connectionURL = "jdbc:mysql://localhost/images";
  java.sql.Connection con= null;
  try{
   Class.forName("com.mysql.jdbc.Driver").newInstance();
   con = DriverManager.getConnection(connectionURL,"root","");
   Statement st1=con.createStatement();
   ResultSet rs1 = st1.executeQuery("select image from images where imageID ='2'");
   String imglen="";
   if(rs1.next()){
    imglen = rs1.getString(1);
    System.out.println(imglen.length());
    
}
   
   rs1 = st1.executeQuery("select image from images where imageID = '2'");
   if (rs1.next()){
    int len = imglen.length();
    byte[] rb = new byte [len];
    InputStream readImg = rs1.getBinaryStream(1);
    int index=readImg.read(rb,0,len);
    System.out.println("index" + index);
    st1.close();
    response.reset();
    response.setContentType("image/jpg");
    response.getOutputStream().write(rb,0,len);
    response.getOutputStream().flush(); 
    
   }
   
  }
  
  catch (Exception 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
 }
}

This is my java getter and setter:

Code:

 
package sg.nyp.edu.sit.model;

public class Image {
int imageID;
Byte image;
String imglen;
public int getImageID() {
return imageID;
}
public void setImageID(int imageID) {
this.imageID = imageID;
}
public Byte getImage() {
return image;
}
public void setImage(Byte image) {
this.image = image;
}
public String getImglen() {
return imglen;
}
public void setImglen(String imgLen) {
this.imglen = imgLen;
}















}

Code:

This is my image.jsp

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 name="form1" method="get" action="./DisplayImage">


</form

</body>

Code:

</html>

My database is called: images
and the attributes are:
int imageID;
Blob image;

May I know what's wrong with it.
Thanks:D
Hope to receive ur reply soon!:D