Can't iterate over list in Jsp

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I am using hibernate to get the subjects associated with a particular user. In mainPage, I want to see firstName and LastName (this works) of the user and allowed subjects. But, for some reason, I am not able to successfully iterate over the list of subjects put in mainPage.

In my Spring controller I have a method, which looks like this:

@RequestMapping(value = "/signin", method = RequestMethod.POST)

    public String SignIn(@ModelAttribute("user") User user, ModelMap modelMap){



        String username = user.getUsername();

        String password = user.getPassword();



        User user1 = userService.getUser(username, password);

        if(user1 != null){



            List<Subject> subjectList = userService.getUserSubjects(user1.getId());



            modelMap.addAttribute("subjects", subjectList);

            modelMap.addAttribute("user", user1);

            return "mainPage";

        }



        modelMap.addAttribute("ShowNotAuthenticated", true);

        return "authentication";

    }

mainPage.jsp looks like this:

<%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>

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

<%@ page contentType="text/html;charset=UTF-8" language="java" %>

<html>

    <head>

        <title>Title</title>

    </head>

    <body>

        <h2>Current user: ${user.firstName} ${user.lastName}</h2> //this works

        <br>

        <h3>Allowed subjects:</h3>

    <table>

        <tr>

            <td>

                Subject Name

            </td>

        </tr>

        <c:forEach items="${subjects}" var="x"> //doesn't work

            <tr>

                <td>

                    ${x.name}

                </td>

            </tr>

        </c:forEach>

    </table>

    </body>

</html>

This is SignIn method during debug:

enter image description here

These are pictures in mainPage.jsp:

enter image description here

Mykhailo Moskura's suggestion doesn't work too:

enter image description here

edited Nov 9 at 19:24

asked Nov 9 at 18:45

A.M

917

You are getting a list of Subject into that variable so, maybe, you are trying to print something you don't have. As you see, the're are 0=> something, 1=> Physics, etc... and the NumberFormatException shows you're trying to process something different from what you expect, Check stackoverflow.com/questions/2148658/…
– Alfabravo
Nov 9 at 19:24

@Alfabravo, you are right, ${x[1]} works
– A.M
Nov 9 at 19:37

add a comment |

up vote
2
down vote

favorite

In my Spring controller I have a method, which looks like this:

@RequestMapping(value = "/signin", method = RequestMethod.POST)

    public String SignIn(@ModelAttribute("user") User user, ModelMap modelMap){



        String username = user.getUsername();

        String password = user.getPassword();



        User user1 = userService.getUser(username, password);

        if(user1 != null){



            List<Subject> subjectList = userService.getUserSubjects(user1.getId());



            modelMap.addAttribute("subjects", subjectList);

            modelMap.addAttribute("user", user1);

            return "mainPage";

        }



        modelMap.addAttribute("ShowNotAuthenticated", true);

        return "authentication";

    }

mainPage.jsp looks like this:

<%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>

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

<%@ page contentType="text/html;charset=UTF-8" language="java" %>

<html>

    <head>

        <title>Title</title>

    </head>

    <body>

        <h2>Current user: ${user.firstName} ${user.lastName}</h2> //this works

        <br>

        <h3>Allowed subjects:</h3>

    <table>

        <tr>

            <td>

                Subject Name

            </td>

        </tr>

        <c:forEach items="${subjects}" var="x"> //doesn't work

            <tr>

                <td>

                    ${x.name}

                </td>

            </tr>

        </c:forEach>

    </table>

    </body>

</html>

This is SignIn method during debug:

enter image description here

These are pictures in mainPage.jsp:

enter image description here

Mykhailo Moskura's suggestion doesn't work too:

enter image description here

edited Nov 9 at 19:24

asked Nov 9 at 18:45

A.M

917

You are getting a list of Subject into that variable so, maybe, you are trying to print something you don't have. As you see, the're are 0=> something, 1=> Physics, etc... and the NumberFormatException shows you're trying to process something different from what you expect, Check stackoverflow.com/questions/2148658/…
– Alfabravo
Nov 9 at 19:24

@Alfabravo, you are right, ${x[1]} works
– A.M
Nov 9 at 19:37

add a comment |

up vote
2
down vote

favorite

In my Spring controller I have a method, which looks like this:

@RequestMapping(value = "/signin", method = RequestMethod.POST)

    public String SignIn(@ModelAttribute("user") User user, ModelMap modelMap){



        String username = user.getUsername();

        String password = user.getPassword();



        User user1 = userService.getUser(username, password);

        if(user1 != null){



            List<Subject> subjectList = userService.getUserSubjects(user1.getId());



            modelMap.addAttribute("subjects", subjectList);

            modelMap.addAttribute("user", user1);

            return "mainPage";

        }



        modelMap.addAttribute("ShowNotAuthenticated", true);

        return "authentication";

    }

mainPage.jsp looks like this:

<%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>

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

<%@ page contentType="text/html;charset=UTF-8" language="java" %>

<html>

    <head>

        <title>Title</title>

    </head>

    <body>

        <h2>Current user: ${user.firstName} ${user.lastName}</h2> //this works

        <br>

        <h3>Allowed subjects:</h3>

    <table>

        <tr>

            <td>

                Subject Name

            </td>

        </tr>

        <c:forEach items="${subjects}" var="x"> //doesn't work

            <tr>

                <td>

                    ${x.name}

                </td>

            </tr>

        </c:forEach>

    </table>

    </body>

</html>

This is SignIn method during debug:

enter image description here

These are pictures in mainPage.jsp:

enter image description here

Mykhailo Moskura's suggestion doesn't work too:

enter image description here

edited Nov 9 at 19:24

asked Nov 9 at 18:45

A.M

917

In my Spring controller I have a method, which looks like this:

@RequestMapping(value = "/signin", method = RequestMethod.POST)

    public String SignIn(@ModelAttribute("user") User user, ModelMap modelMap){



        String username = user.getUsername();

        String password = user.getPassword();



        User user1 = userService.getUser(username, password);

        if(user1 != null){



            List<Subject> subjectList = userService.getUserSubjects(user1.getId());



            modelMap.addAttribute("subjects", subjectList);

            modelMap.addAttribute("user", user1);

            return "mainPage";

        }



        modelMap.addAttribute("ShowNotAuthenticated", true);

        return "authentication";

    }

mainPage.jsp looks like this:

<%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>

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

<%@ page contentType="text/html;charset=UTF-8" language="java" %>

<html>

    <head>

        <title>Title</title>

    </head>

    <body>

        <h2>Current user: ${user.firstName} ${user.lastName}</h2> //this works

        <br>

        <h3>Allowed subjects:</h3>

    <table>

        <tr>

            <td>

                Subject Name

            </td>

        </tr>

        <c:forEach items="${subjects}" var="x"> //doesn't work

            <tr>

                <td>

                    ${x.name}

                </td>

            </tr>

        </c:forEach>

    </table>

    </body>

</html>

This is SignIn method during debug:

enter image description here

These are pictures in mainPage.jsp:

enter image description here

Mykhailo Moskura's suggestion doesn't work too:

enter image description here

java spring-mvc

edited Nov 9 at 19:24

asked Nov 9 at 18:45

A.M

917

edited Nov 9 at 19:24

asked Nov 9 at 18:45

A.M

917

edited Nov 9 at 19:24

asked Nov 9 at 18:45

A.M

917

asked Nov 9 at 18:45

A.M

917

asked Nov 9 at 18:45

A.M

917

You are getting a list of Subject into that variable so, maybe, you are trying to print something you don't have. As you see, the're are 0=> something, 1=> Physics, etc... and the NumberFormatException shows you're trying to process something different from what you expect, Check stackoverflow.com/questions/2148658/…
– Alfabravo
Nov 9 at 19:24

@Alfabravo, you are right, ${x[1]} works
– A.M
Nov 9 at 19:37

add a comment |

You are getting a list of Subject into that variable so, maybe, you are trying to print something you don't have. As you see, the're are 0=> something, 1=> Physics, etc... and the NumberFormatException shows you're trying to process something different from what you expect, Check stackoverflow.com/questions/2148658/…
– Alfabravo
Nov 9 at 19:24

@Alfabravo, you are right, ${x[1]} works
– A.M
Nov 9 at 19:37

You are getting a list of Subject into that variable so, maybe, you are trying to print something you don't have. As you see, the're are 0=> something, 1=> Physics, etc... and the NumberFormatException shows you're trying to process something different from what you expect, Check stackoverflow.com/questions/2148658/…
– Alfabravo
Nov 9 at 19:24

@Alfabravo, you are right, ${x[1]} works
– A.M
Nov 9 at 19:37

add a comment |

1 Answer
1

active

oldest

votes

up vote
3
down vote

accepted

From debugger screenshot I see that your subjectList has elements of type Object. So you either need to change what you store in that list or try to use ${x[1]} instead of ${x.name}.

answered Nov 9 at 19:37

Ivan

4,4891720

Yes, it works, but why is it so?
– A.M
Nov 9 at 19:38

1

To tell that code of userService.getUserSubjects() is needed
– Ivan
Nov 9 at 19:41

add a comment |

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

up vote
3
down vote

accepted

From debugger screenshot I see that your subjectList has elements of type Object. So you either need to change what you store in that list or try to use ${x[1]} instead of ${x.name}.

answered Nov 9 at 19:37

Ivan

4,4891720

Yes, it works, but why is it so?
– A.M
Nov 9 at 19:38

1

To tell that code of userService.getUserSubjects() is needed
– Ivan
Nov 9 at 19:41

add a comment |

up vote
3
down vote

accepted

From debugger screenshot I see that your subjectList has elements of type Object. So you either need to change what you store in that list or try to use ${x[1]} instead of ${x.name}.

answered Nov 9 at 19:37

Ivan

4,4891720

Yes, it works, but why is it so?
– A.M
Nov 9 at 19:38

1

To tell that code of userService.getUserSubjects() is needed
– Ivan
Nov 9 at 19:41

add a comment |

up vote
3
down vote

accepted

From debugger screenshot I see that your subjectList has elements of type Object. So you either need to change what you store in that list or try to use ${x[1]} instead of ${x.name}.

answered Nov 9 at 19:37

Ivan

4,4891720

From debugger screenshot I see that your subjectList has elements of type Object. So you either need to change what you store in that list or try to use ${x[1]} instead of ${x.name}.

answered Nov 9 at 19:37

Ivan

4,4891720

answered Nov 9 at 19:37

Ivan

4,4891720

answered Nov 9 at 19:37

Ivan

4,4891720

answered Nov 9 at 19:37

Ivan

4,4891720

Yes, it works, but why is it so?
– A.M
Nov 9 at 19:38

1

To tell that code of userService.getUserSubjects() is needed
– Ivan
Nov 9 at 19:41

add a comment |

Yes, it works, but why is it so?
– A.M
Nov 9 at 19:38

1

To tell that code of userService.getUserSubjects() is needed
– Ivan
Nov 9 at 19:41

Yes, it works, but why is it so?
– A.M
Nov 9 at 19:38

To tell that code of userService.getUserSubjects() is needed
– Ivan
Nov 9 at 19:41

add a comment |

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