map

@ManyToMany(cascade = {ALL}, fetch = FetchType.EAGER)
    @JoinTable(name = "follows",
    joinColumns = { @JoinColumn(name = "userId",referencedColumnName = "user_id") },
    inverseJoinColumns = { @JoinColumn(name = "zapId", referencedColumnName = "user_id") })
    private List<User> follows = new ArrayList<User>();
    //followed

    @ManyToMany(mappedBy = "follows",  fetch = FetchType.EAGER, cascade = {ALL})
    private List<User> followers = new ArrayList<User>();





public void followUser(User toFollow) {

        if(!this.follows.contains(toFollow)) {
            this.follows.add(toFollow);
            toFollow.followers.add(this);
        }

    }

/************** controller ****************/
currentUser.followUser(authorUser);

            userDao.merge(currentUser);
            userDao.merge(authorUser);
User korisnik = userDao.findById(currentUser.getIdUser());
request.getSession().setAttribute("korisnik",korisnik);





/************* jsp ******************* /
<c:if test="${fn:length(korisnik.followers)==0}">
            <h3>You currently don't have any user who follow you.</h3>
        </c:if>


       <c:if test="${fn:length(korisnik.followers)!=0}">
        <h3>You are followed by:</h3>
        <table border="1" class="dataTable">
            <tr>
                <th><fmt:message key="korisnickoIme"/></th>
                <th><fmt:message key="imeKorisnika"/></th>
                <th><fmt:message key="prezimeKorisnika"/></th>
            </tr>

            <c:forEach items="${korisnik.followers}" var="follower">
                <tr>
                        <td>${follower.username}</td>
                        <td>${follower.name}</td>
                        <td>${follower.surname}</td>
                        <td><a href = "AutorProfileController?idFollower=${follower.idUser}&idPage=1"><fmt:message key="prikazi"/></a></td>
                </tr>
            </c:forEach>

        </table>
    </c:if>

        <br>



        <c:if test="${fn:length(korisnik.follows)==0}">
            <h3>You currently don't have any followed users.</h3>
        </c:if>


        <c:if test="${fn:length(korisnik.follows)!=0}">
            <h3>You currently follow:</h3>
            <table border="1" class="dataTable">
            <tr>
                <th><fmt:message key="korisnickoIme"/></th>
                <th><fmt:message key="imeKorisnika"/></th>
                <th><fmt:message key="prezimeKorisnika"/></th>

            </tr>

            <c:forEach items="${korisnik.follows}" var="foll">
            <tr>
                <td>${foll.username}</td>
                <td>${foll.name}</td>
                <td>${foll.surname}</td>
                <td><a href = "AutorProfileController?idFollowed=${foll.idUser}&idPage=1"><fmt:message key="prikazi"/></a></td>         </tr>
            </c:forEach>
        </table>
        </c:if>