How to add array values in drop down list using java servlet

Question

Friends please tell how to add list of array values in drop down list using java servlet.

Please check the below code and tell any error in this code..

My Jsp Page.... DropDown.jsp

<body onload="callAction()">
<form>
<script type="text/javascript">
    function callAction() {
        document.location.href="http://localhost:8084/Servlet/DropDown";
    }
</script>

<select name="Day"><option>Day</option>
    <c:forEach items="${Data}" var="d">
        <option value="${d}">${d}</option>
    </c:forEach>      
</select>
</form>
</body>

My Servlet page DropDown.java

protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
int[] day=new int[]{1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31};

    request.setAttribute("Data", day);

 response.sendRedirect("DropDown.jsp");
}

score 1 · Accepted Answer · 2014-09-05 10:13:00Z

1

EDIT

servlet

int[] day=new int[]{1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31};
request.setAttribute("Data", day);//<-- no loop required !
//response.sendRedirect("DropDown.jsp");//<-- this will make a new request
request.getRequestDispatcher("DropDown.jsp").forward(request, response);//<-- forward it

DropDown.jsp:

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<select name="Day">
    <option>Day</option>
    <c:forEach var="d" items="${Data}">
      <option value="${d}">${d}</option>
    </c:forEach>
</select>

edited Sep 5, 2014 at 10:13

answered Sep 5, 2014 at 7:22

user2575725

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5 Comments

Shaji SS Over a year ago

@Aravind I am not getting the values.. Plz check the code, now I updated the full code.. Please check and reply for that..

Shaji SS Over a year ago

@Aravind.. Currently nothing displaying on the browser.. Please check the javascript and tell any error on this..

user2575725 Over a year ago

@ShajiSS, remove that script tag from jsp, not needed, tell me do you have only this servlet and jsp in your web-app? here your servlet needs to be invoked before jsp

user2575725 Over a year ago

@ShajiSS, jsp cannot render values from the request attributes after page load, still if you need in that way you will need ajax

user2575725 Over a year ago

@ShajiSS, kindly accept the answer, as it worked for you

Ker p pag · Accepted Answer · 2014-09-05 10:44:48Z

0

for(int i=1;i<=day.length;i++)
    {
        request.setAttribute("data", day[i]);
    }

it will override the data attribute and replace a new value. just set attribute with the array.

request.setAttribute("data",day);

then in your select use JSTL and import the jstl tag library

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

<select name="Day">
   <c:foreach items="${data}" var="d">
    <option>${d}</option>
    </c:foreach>
</select>

edited Sep 5, 2014 at 10:44

answered Sep 5, 2014 at 7:14

Ker p pag

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1 Comment

Ker p pag Over a year ago

it will not take effect because you are using response.redirect. you must use requestdispatcher

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