i wondering test condition jstl if-
boolean cbtest1=interests[0]!=null;//cbtest1 true and jsp code-
<td >interest1 <c:choose> <c:when test="${cbtest1}"> <input type="checkbox" name="interest1" checked/> </c:when> <c:otherwise> <input type="checkbox" name="interest1" /> </c:otherwise> </c:choose> </td> but when rendering page,block of otherwise executed!
i test following-
<c:when test="${interests[0]!=null}"> in case otherwise executed too.
this makes me more weird when test negation-
<c:when test="${interests[0]==null}"> or-
<c:when test="${!cbtest1}"> in above both case when executed.where wrong?
value of interests[0] "y" , of cbtest true.
screenshot of page attached in value of cbtest , interest[o] ie interest1 being display.
as jbnizt suggested- made following changes,i set array of boolean rather string array in request.-
servlet1.java
@webservlet("/serv") public class servlet1 extends httpservlet { private static final long serialversionuid = 1l; /** * @see httpservlet#dopost(httpservletrequest request, httpservletresponse response) */ protected void dopost(httpservletrequest request, httpservletresponse response) throws servletexception, ioexception { string username=request.getparameter("username").trim(); string password=request.getparameter("password").trim(); system.out.println("hellow! "+username); try{ connection con=commonutil.getconnection(); statement st=con.createstatement(); resultset rs=st.executequery("select * login"); int flag=0; while(rs.next()){ if(rs.getstring(1).trim().equals(username)&&rs.getstring(2).trim().equals(password)){ flag=1; httpsession session=request.getsession(); session.setattribute("loginid", rs.getstring(3).trim()); resultset rs1=st.executequery("select * details loginid='"+ rs.getstring(3).trim()+"'"); rs1.next(); string name=rs1.getstring(1); string address=rs1.getstring(2); string hobby=rs1.getstring(4); resultset rs2=st.executequery("select * interest loginid='"+session.getattribute("loginid")+"'"); rs2.next(); string interest1=rs2.getstring(2); string interest2=rs2.getstring(3); string interest3=rs2.getstring(4); request.setattribute("name", name); request.setattribute("address", address); request.setattribute("hobby", hobby); boolean[] interest={(interest1!=null),(interest2!=null),(interest3!=null)}; request.setattribute("interest", interest); system.out.println(interest1+interest2+interest3); system.out.println(name+address+hobby); request.getrequestdispatcher("display.jsp").forward(request, response); return; } } if(flag==0){ request.setattribute("message", "invalide login credentials!"); request.getrequestdispatcher("index.jsp").forward(request, response); return; } }catch(exception e){ system.out.println(e); } } } display.jsp
<%@ page language="java" contenttype="text/html"%> <%@page import="java.sql.connection" import="java.util.enumeration" import="java.sql.resultset"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> <!doctype html public "-//w3c//dtd html 4.01 transitional//en" "http://www.w3.org/tr/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=iso-8859-1"> <title>insert title here</title> </head> <body> hellow!! <% out.println(session.getattribute("loginid")); string name=(string)request.getattribute("name"); string address=(string)request.getattribute("address"); string hobby=(string)request.getattribute("hobby"); boolean[] interests=(boolean[])request.getattribute("interest"); out.println(name+"</br>address- "+address+"</br>hobby- "+hobby+"</br>interest1- "+interests[0]+"</br>interest2- "+interests[1]+"</br>interest3- "+interests[2]+"</br>interests- "+interests); %> <form action="updateserv" method="post"> <table> <tr > <td >name:</td> <td ><input type="text" name="username" value="${name}"/></td> </tr> <tr> <td> address:</td> <td ><input type="text" name="address" value="${address}"/></td> </tr> </table> <table> <tr > <td >interest1 <c:choose> <c:when test="${interests[0]}"> <input type="checkbox" name="interest1" checked/> </c:when> <c:otherwise> <input type="checkbox" name="interest1" /> </c:otherwise> </c:choose> </td> <td >interest2<input type="checkbox" name="interest2" /></td> <td >interest3<input type="checkbox" name="interest3" /></td> </tr> <tr> <td >hobby1<input type="radio" value="hobby1" name="hobby"/></td> <td >hobby2<input type="radio" value="hobby2" name="hobby"/></td> <td >hobby3<input type="radio" value="hobby3" name="hobby"/></td> </tr> <tr> <td></td> <td><input type="submit" value="update"></td> <td></td> </tr> </table> </form> this still not working.
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