How do I populate a dropdownlist in jsp using servlet?

See more:

Java

JSP

servlet

I am a beginner in jsp and servlets. I want to stay in the same page and populate the dropdownlist but iam not able to so. I did it using scriplets and it happened but scriplets are deprecated long back. I just want to know more about servlet mapping in web.xml. I guess something is wrong with the mapping. Please somebody help asap.

What I have tried:

Home.jsp

<form>
<select name="source" style="width:180 px"></select>
		
    <c:forEach items="${slist}" var="ls">
     <option> <c:out value="${ls}"/></option>
          
    </c:forEach>
</form>

In Servlet

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

	try{  
			Class.forName("com.mysql.cj.jdbc.Driver");  
			Connection con=DriverManager.getConnection(  
		"jdbc:mysql://localhost:3306/dbname","root","password");   
			Statement stmt=con.createStatement();  
			ResultSet rs=stmt.executeQuery("select * from City");  
			while(rs.next()) 
			{
			     i=rs.getInt(1);
			     val=rs.getString(2);
			     ar.add(val);
			    
			}
			 request.setAttribute("slist",ar);
			 
                  
                 request.getRequestDispatcher("/WebContent/Home.jsp").forward(request, response);
		     //rd.forward(req,res);
		     //System.out.println(rs.getInt(1)+"  "+rs.getString(2)+"  ");  
			con.close(); 
			}catch(Exception e){ System.out.println(e);}  
		finally
		{
			
		}
		
	}