JSP - how do i add a dropdown list which the data is extracted from Hibernate

you can create drop-down list in jsp using this tag <html:select>..so itwould be something like this:

<html:select property="hairType">                
               <html:option value="Select one"/>
               <html:options collection="hairColorList " property="value" labelProperty="label"/>
               </html:select>

You can populate the drop down (<html:select >) using LabelValueBean.

Follow this sample code


>>How to use Label Value Bean

LabelValueBean takes two parameters("x","y")  something like  LabelValueBean("x","Y")
one parameter is displayed in the front end ("Y") and the other one ("x") goes to the server when the jsp is submitted

Sample

Consider a scenario where you have a select field in your jsp page. you can perform operations on the select field using LabelValueBean

Create a util class which populates values in LabelValueBean

>>>>>>>>>>>>>>>>>
private static ArrayList hairColorList = new ArrayList();
private static void buildHairColorList() {
        hairColorList.clear();
        hairColorList.add(new LabelValueBean("1","BLONDE")); // "BLONDE"  is  displayed on the front end and "1" is submitted to server
        hairColorList.add(new LabelValueBean("2","BLACK"));
        hairColorList.add(new LabelValueBean("3","RED"));
        hairColorList.add(new LabelValueBean("4","GRAY/WHITE"));
        hairColorList.add(new LabelValueBean("5","BROWN"));
        hairColorList.add(new LabelValueBean("6","NONE/BALD"));
        hairColorList.add(new LabelValueBean("7","OTHER"));
        hairColorList.add(new LabelValueBean("8","BALDING"));
        hairColorList.add(new LabelValueBean("9","UNKNOWN"));
        hairColorList.trimToSize();
     }


>>>>>>>>>>>>>>>>
Your Jsp would be
<html:select property="hairType">                          //Make sure hairType  is in the form bean
               <html:option value="Select one"/>
               <html:options collection="hairColorList " property="value" labelProperty="label"/>
               </html:select>



>>>>>>>>>>>>>
Once you submit your jsp page, in your action class you can get the value of the select field("hairType")
so, Your action class code would be

public ActionForward relType (
               ActionMapping mapping,
               ActionForm form,
               HttpServletRequest request,
               HttpServletResponse response)
               throws Exception
               {
               ActionErrors errors = new ActionErrors();
               ActionForward forward = new ActionForward();  
               HttpSession session=request.getSession(true);
               DynaValidatorForm dForm = (DynaValidatorForm) form;
               String hType = (String) dForm.get("hairType");  //get value of "hairType" select field from jsp
                         
               if (hType .equals("1"))    //  meaning BLONDE
               {
                   
               // write logic for blonde women :)
               return mapping.findForward("BlondePage");

               } else if (hType.equals("5"))   //meaning BROWN
               {
               //write logic for brown women    
               return mapping.findForward("BrownPage");
               } else if (hType.equals("2 or 3 or 4 or some thing"))
               {

                    return mapping.findForward("// do some thing");
               }
          }    


hope this helps
J