Not able to display image from the object retrieved back from the database into the jsp page.

Hello,

I have used struts 2 framework and ejb3 .
Here i am posting all my codes..

1.index.jsp
2.ImageAction.java for persisting the whole Image object into the database.
3.ShowImage.java for retrieving the desired object from the database.
4.display.jsp where image will be shown.
5.Images.java Images Entity Bean.

code.1

code 2

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package com.example;

import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
import com.opensymphony.xwork2.Preparable;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;

/**

*

* @author shashank

*/

public class ImageAction extends ActionSupport implements ModelDriven,Preparable {

Images image;

public ImageAction() {

}

@Override
    public String execute() throws Exception {
boolean status=false;

EntityManagerFactory factory=Persistence.createEntityManagerFactory("WebApplication3PU");
        EntityManager manager=factory.createEntityManager();
        manager.getTransaction().begin();
        manager.persist(image);
        manager.getTransaction().commit();
        status=true;
        if(status==true)
            return SUCCESS;
        else
            return ERROR;

}

@Override
    public Object getModel() {
        return image;
    }

@Override
    public void prepare() throws Exception {
        image=new Images();
    }

}

code 3.

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package com.example;

import com.opensymphony.xwork2.ActionSupport;
import java.util.Map;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts2.interceptor.ServletRequestAware;
import org.apache.struts2.interceptor.SessionAware;

/**

*

* @author shashank

*/

public class ShowImage extends ActionSupport implements SessionAware,ServletRequestAware {

HttpServletRequest request;
    Map<String,Object> session;

public ShowImage() {

}

@Override
    public String execute() throws Exception {
        String imageid=request.getParameter("imageid");
        EntityManagerFactory factory=Persistence.createEntityManagerFactory("WebApplication3PU");
        EntityManager manager=factory.createEntityManager();
        manager.getTransaction().begin();
        Images image=manager.find(Images.class, imageid);
        manager.getTransaction().commit();
        session.put("image", image);
        return SUCCESS;

}

@Override
    public void setSession(Map<String, Object> session) {
        this.session=session;
    }
    @Override
    public void setServletRequest(HttpServletRequest request) {
        this.request=request;
    }

}

code 4..

code 5.

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package com.example;

import java.io.Serializable;
import javax.persistence.Basic;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

/**
 *
 * @author shashank
 */
@Entity
@Table(name="IMAGES")
public class Images implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @Column(name="IMAGE_ID")
    private String imageid;
    @Column(name="IMAGE")
    @Basic(fetch=FetchType.LAZY)
    private Serializable image;
    @Column(name="NAME")
    private String name;

public Serializable getImage() {
        return image;
    }

public void setImage(Serializable image) {
        this.image = image;
    }

public String getImageid() {
        return imageid;
    }

public void setImageid(String imageid) {
        this.imageid = imageid;
    }

public String getName() {
        return name;
    }

public void setName(String name) {
        this.name = name;
    }

@Override
    public boolean equals(Object obj) {
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        final Images other = (Images) obj;
        if ((this.imageid == null) ? (other.imageid != null) : !this.imageid.equals(other.imageid)) {
            return false;
        }
        return true;
    }

@Override
    public int hashCode() {
        int hash = 7;
        hash = 71 * hash + (this.imageid != null ? this.imageid.hashCode() : 0);
        return hash;
    }

}

Please help me.
I am stuck on this.

Thanks for helping me.

Regards
Shashank Pratap.

In here, you are trying to output all the binary data of the image to 'src' attribute of the image html tag. See the html source of the generated code and you can verify that.

What you should have done is set the value of the 'src' attribute to a servlet which print the binary data stream of the image using a output stream and set the content type of that output response to relevant image mime type.

e.g.:

Where relevant servlet mapped to "/imgegenerateservlet.do" URL will read the image (can use a variable similar to which I have mentioned here 'imgid' to select the relevant image) from the database and set thecontent type of the response to an image related mime type such as 'image/jpeg' and then write the image data to the response using output stream.
I am not much familiar with EJB related things. So I don't know how to achieve this using EJB related stuffs.

Thanks & Regards,
Manjula

Hi shashank,

Manjula is correct you have to use servlet to find image and write that image stream into the response. This tutorial perhaps help you http://balusc.blogspot.com/2007/04/imageservlet.html