Using POJO's with SelectOneMenu with Generic Converter

Question

Hello How to use List of POJO\'s with JSF h:selectOneMenu or Primefaces p:selectOneMenu?
I know that there are lot of related questions which s

Answer 1

here is a complete example of using a POJO with Primefaces p:selectOneMenu.the primfaces select one menu display a list of students.If you press details button after select any student, a primfaces dialog will appear with the full name of this student.

com.model package:

Student class

package com.model;

import java.io.Serializable;

public class Student implements Serializable{


private static final long serialVersionUID = 1L;

private int Id;


public int getId() {
    return Id;
}
public void setId(int id) {
    Id = id;
}

private String lastName;
private String firstName;


public String getLastName() {
    return lastName;
}
public void setLastName(String lastName) {
    this.lastName = lastName;
}
public String getFirstName() {
    return firstName;
}
public void setFirstName(String firstName) {
    this.firstName = firstName;
}

public Student() {
    super();
    }

    public Student(String lastName, String firstName,int Id) {
    super();
    this.lastName = lastName;
    this.firstName = firstName;
    this.Id = Id;


  }}

The converter

   package com.model;

 import java.util.ArrayList;
 import java.util.List;

 import javax.faces.application.FacesMessage;
 import javax.faces.component.UIComponent;
 import javax.faces.context.FacesContext;
 import javax.faces.convert.Converter;
 import javax.faces.convert.ConverterException;
 import javax.faces.convert.FacesConverter;

  @FacesConverter(forClass = com.model.Student.class,value="student")
   public class StudentConverter implements Converter{
 public static List studentDB;

    static {
        studentDB = new ArrayList();
        studentDB.add(new Student("William", "Wong", 1));
        studentDB.add(new Student("John", "Smith", 2));
        studentDB.add(new Student("Mari", "Beckley", 3));
        studentDB.add(new Student("Messi", "Leonardo",4));
        studentDB.add(new Student("William", "Astrid", 5));
        studentDB.add(new Student("William", "Banana", 6));

        }

    public Object getAsObject(FacesContext facesContext, UIComponent component, String submittedValue) {
        if (submittedValue.trim().equals("")) {
            return null;
        } else {
            try {
                int number = Integer.parseInt(submittedValue);

                for (Student s : studentDB) {
                    if (s.getId() == number) {
                        return s;
                    }
                }

            } catch(NumberFormatException exception) {
                throw new ConverterException(new FacesMessage(FacesMessage.SEVERITY_ERROR, "Conversion Error", "Not a valid player"));
            }
        }

        return null;
    }

    public String getAsString(FacesContext facesContext, UIComponent component, Object value) {
        if (value == null || value.equals("")) {
            return "";
        } else {
            return String.valueOf(((Student) value).getId());
        }
    }
}

com.managedbean package

   package com.managedbean;

   import java.util.List;
   import javax.annotation.PostConstruct;
   import javax.faces.bean.ManagedBean;
   import javax.faces.bean.ViewScoped;
   import com.model.Student;
   import com.model.StudentConverter;

 @ManagedBean
 @ViewScoped
    public class StudentMB {
    private Student  selectedStudent;
    public Student getSelectedStudent() {
    return selectedStudent;
}


public void setSelectedStudent(Student selectedStudent) {
    this.selectedStudent = selectedStudent;
}


public List getStudents() {
    return students;
}


public void setStudents(List students) {
    this.students = students;
}


private List students;


@PostConstruct
public void init(){
    students=StudentConverter.studentDB;
}

 }

selectMenu.xhtml

get the source code

you can download the complete example built using eclipse and deployed to glassfish from here