Image download servlet

Requirement : In Application we need to show image in image component. I have followed below approach. Created servlet and mapped its url to image source attribute. Please follow below screen shot.


and ImageServlet code..


public class ImageServlet extends HttpServlet {
    private static final String CONTENT_TYPE = "image/jpeg; charset=UTF-8";

    public void init(ServletConfig config) throws ServletException {
        super.init(config);
    }

    public void doGet(HttpServletRequest request,
                      HttpServletResponse response) throws ServletException,
                                                           IOException {
        response.setContentType(CONTENT_TYPE);
        String appModuleName = "yash.hr.model.am.AppModule";
        String appModuleConfig = "AppModuleLocal";
        ApplicationModule am = null;
        ViewObject vo = null;
        try{
            String emp_id=request.getParameter("emp_id");
            am = Configuration.createRootApplicationModule(appModuleName, appModuleConfig);
            vo = am.findViewObject("AccessImageVO1");
            if (vo == null)
            {
                throw new Exception("ImageAccessView1 not found!");
            }
            vo.ensureVariableManager().setVariableValue("emp_id",emp_id );
         
            vo.executeQuery();
         
            if(vo!=null&&vo.getRowCount()>0){
             
                BlobDomain image = null;
             
               image=(BlobDomain) vo.first().getAttribute("ImageData");
                response.setContentType(CONTENT_TYPE);
                     OutputStream outputStream = response.getOutputStream();
                     IOUtils.copy(image.getInputStream(), outputStream);
                            // cloase the blob to release the recources
                     image.closeInputStream();
                            // flush the outout stream
                 outputStream.flush();
             
            }
     
        }catch(Exception e){
          e.printStackTrace();
        }            finally
            {

                if (am != null)
                {
                    //Release the appModule
                    Configuration.releaseRootApplicationModule(am, true);
                }
            }
     
    }
}



Cheers...

Kiran.

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