iterate HashMap<String,List> in My jsp page

[Niharika Sweety]

Hi Friends ..Please help- me
I want to iterate HashMap<String,List> in My jsp page..

My requirement is like this

ID Locations
123 Abc,def,ghi, etc.
456 Kjl,mno etc..

here i got values from DB and I was set in HashMap like this HashMap<id,location> now i want display these values in to my Jsp..

Thanks..... please help me.. urgent

[Bear Bibeault]

Assuming that you have placed the Map into a scoped variable -- let's call it myMap -- you can iterate over the Map.Entry values of the Map with the JSTL forEach tag as follows:

<c:forEach items="${myMap}" var="entry">

Within the body of the tag, the variable entry will represent each Map.Entry in turn. You can get the key with ${entry.key} and the value (which in this case is your List) with ${entry.value}.

If you need to iterate over the List, you'd use another forEach tag to iterate over it.

With that, give writing your code a try. We'll help you with any problems you have along the way.

[Niharika Sweety]

Thanks for replay...
ACtually i'm getting HashMap values from applicationBean.getRacfLoc(); this method..

my code is like this ..

HashMap map = applicationBean.getRacfLoc();

					Set set = map.entrySet()
					Iterator it = set.iterator()
			while (it.hasNext()) {
			Map.Entry me = (Map.Entry) it.next();
				System.out.print("-->R:"me.getKey() );
				System.out.println("-->L"me.getValue());
				}

Please translate this code with JSP syntaxes.. I have to display in jsp page only...
Thanks..

[Bear Bibeault]

No, I will not write the code for you. And no, you should not be doing this with Java code in a JSP. That's a bad practice that's been discredited for over 10 years now.

You should be using the JSTL and EL in JSP pages, and the <c:forEach> JSTL tag as I described is the best way to achieve your goals.

[Niharika Sweety]

Thanks Please provide me JSTL code for

HashMap<String,List<String>> iteration..

I'm written here.. Please correct me if any mistake, because of i dn't know JSTL..

<table align="center" cellpadding="1" border="1">   
             <thead> <tr>   
                        <th> ID</th>   
                        <th>Locations</th>   
                </tr>   
              </thead>   
                
                    <tbody>   
              <c:set property="hashMap" value="<%= applicationBean.getRacfLoc() %>" />   
              <c:forEach var="map" items="${hashMap}">   
  
                     <tr>   
                        <td>${map.key} </td>   
                             
                        <td>${map.value}</td>   
                           
                     </tr>   
                    </c:forEach>   
                    </tbody>   
             </table>  
 

[Bear Bibeault]

What problems are you seeing when you use that code?

[Prasad Krishnegowda]

The code you have written is fine. But, why can't you place the hashMap in scoped variable, instead of using scriplets to assign its value to JSTL variable? I would recommend not to use even a single line of scriplets in JSP.

[Niharika Sweety]

Thanks i'm resolved my problem.. with this code
Thanks a lot for you are help

<table align="center" cellpadding="" border="">
			 <thead> <tr>
			    		<th> ID</th>
			    		<th>Locations</th>
			  	</tr>
			  </thead>
			 
				   <tbody>
			  <c:set var="map" value="<%= applicationBean.getidLoc() %>" />
			  <c:forEach var="ids" items="${map}">

					 <tr>
						<td>${ids.key}<td>
						<td>${ids.value}</td>
						
					 </tr>
					</c:forEach>
				    </tbody>
			 </table>