Display variable-length list of Strings in JSP page using Spring framework

Question

Is it possible to display a variable-length list (or set) of Strings in a JSP page using the Spring framework ?

Currently I have the following in my Java Controller :-

@Controller
@RequestMapping("/")
public class HelloController
{ 
   @RequestMapping(method = RequestMethod.GET)
   public String printHello(ModelMap model)
   {
      model.addAttribute("message1", "Cat");
      model.addAttribute("message2", "Dog");
      model.addAttribute("message3", "Fish");
      model.addAttribute("message4", "Bird");

      return "hello";
   }
}

Currently I have the following in "hello.jsp" :-

<%@ page contentType="text/html; charset=UTF-8" %>
<html>
<head>
<title>Hello World</title>
</head>
<body>
   <p>${message1}</p>
   <p>${message2}</p>
   <p>${message3}</p>
   <p>${message4}</p>
</body>
</html>

Is it possible to do this but with a variable-length list (or set) ?

Thank you for your time,

James

Andreas · Accepted Answer · 2015-11-05 01:14:35Z

1

Put a List object into the model, and use a <c:forEach> loop to iterate the list.

model.addAttribute("messages", Arrays.asList("Cat", "Dog", "Fish", "Bird"));

<c:forEach var="message" items="${messages}">
  <p>${message}</p>
</c:forEach>

answered Nov 5, 2015 at 1:14

Andreas

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sanjay · Accepted Answer · 2015-11-05 07:54:16Z

1

Put your key and value pair into Map and set it into model object.

Iterate Map object using jstl foreach loop in jsp page and get required output in key value pait

(1)Write your Controller

    Map<String, String> messageList = new HashMap<String, String>();
    messageList.put("message1", "Cat");
    messageList.put("message2", "value2");
    messageList.put("message3", "value3");
    messageList.put("message4", "value4");

    model.addAttribute("messageList",messageList);


(2)JSP page

    <c:forEach var="msg" items="${messageList}">
        ${msg.key} : ${msg.value}
    </c:forEach>

answered Nov 5, 2015 at 7:54

sanjay

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