datatable doesnot render data in jsf from database through linkedlist

Question

this one is my jsf page in which i have tried a very good to meet the requirement on the properties of java bean object. I have checked all the problem in this website but noon of seem to help. I dont know what is problem with my code

    <h:dataTable value="#{contact.getPeopleList()}" var="data">

        <h:column>
            <f:facet name="header">ID</f:facet>
            <h:outputText value="#{data.id}"/>
        </h:column>
        <h:column>
            <f:facet name="header">Name</f:facet>
            <h:outputText value="#{persons.name}"/>
        </h:column>
        <h:column>
            <f:facet name="header">Mobile Number</f:facet>
            #{persons.mobilenumber}
        </h:column>
        <h:column>
            <f:facet name="header">Phone Number</f:facet>
            #{persons.telephone}
        </h:column>
        <h:column>
            <f:facet name="header">Address</f:facet>
            #{persons.address}
        </h:column>

    </h:dataTable>
</h:body>

This one is my Contact CLass in which i have inject Person class to get the properties of Person class

        @Named
        @RequestScoped
        public class Contact {
            private Person person;

            @PostConstruct
            public void init(){
                this.person=new Person();

            }

            public Person getPerson() {
                return person;
            }

            public void setPerson(Person person) {
                this.person = person;
            }



            public String onSubmit(){
                ContactDAO doaContact=new ContactDAO();
                doaContact.insertContact(person);


                return "contactpage";
            }
            public List<Person> getPeopleList(){
                ContactDAO doaContact=new ContactDAO();
                List<Person> personList =doaContact.getAll();
                return personList;
            }
        }


            package np.com.drose.beans;

            import java.util.List;
            import np.com.drose.doa.ContactDAO;



            public class Person {
                private int id;
                private String name;
                private int mobilenumber;
                private int telephone;
                private String address;


                public Person() {

                }

                public Person(int id, String name, int mobilenumber, int telephone, String address) {
                    this.id = id;
                    this.name = name;
                    this.mobilenumber = mobilenumber;
                    this.telephone = telephone;
                    this.address = address;
                }


                public Person(String name, int mobilenumber, int telephone, String address) {
                    this.name = name;
                    this.mobilenumber = mobilenumber;
                    this.telephone = telephone;
                    this.address = address;

                }

                public int getId() {
                    return id;
                }

                public void setId(int id) {
                    this.id = id;
                }

                public String getName() {
                    return name;
                }

                public void setName(String name) {
                    this.name = name;
                }

                public int getMobilenumber() {
                    return mobilenumber;
                }

                public void setMobilenumber(int mobilenumber) {
                    this.mobilenumber = mobilenumber;
                }

                public int getTelephone() {
                    return telephone;
                }

                public void setTelephone(int telephone) {
                    this.telephone = telephone;
                }

                public String getAddress() {
                    return address;
                }

                public void setAddress(String address) {
                    this.address = address;
                }   
            }

here i get confused in the Data access object class where i cant seem to find what i did wrong and why my code is not rendering data from database

 public List<Person> getAll(){
                    List<Person> contactList= new LinkedList<>();
                    String sql="Select * from contact";
                    try{
                        conn = DataConnection.getConnetion();
                        ps=conn.prepareStatement(sql);
                        rs=ps.executeQuery();
                        while(rs.next()){
                           Person person=new Person(rs.getInt("id"),rs.getString("name"),rs.getInt("mobilenumber"),rs.getInt("telephone"),rs.getString("address"));
                           contactList.add(person);
                        }

                    }catch(Exception EX){
                        EX.printStackTrace();
                    }
                    return contactList;
                }

Answer 1

to render datatable in jsf,you need to have listas attribute of Bean class.For example :

           @Named
        @RequestScoped
        public class Contact {
            private Person person;
            private List<Person>personList;


            @PostConstruct
            public void init(){
                this.person=new Person();

            }

            public Person getPerson() {
                return person;
            }

            public void setPerson(Person person) {
                this.person = person;
            }

            public List<Person> getPersonList() {
        return personList;
    }



    public void setPersonList(List<Person> personList) {
        this.personList = personList;
    }

            public String onSubmit(){
                ContactDAO doaContact=new ContactDAO();
                doaContact.insertContact(person);


                return "contactpage";
            }
            public List<Person> getPeopleList(){
                ContactDAO doaContact=new ContactDAO();
               personList =doaContact.getAll();
                return personList;
            }
}

and in your html file you should write like this :

<h:dataTable value="#{contact.personList}" var="data">

please check like that.