How to get the list of all attributes of a Java object using BeanUtils introspection?

Question

I have method which gets a POJO as it\'s parameter. Now I want to programmatically get all the attributes of the POJO (because my code may not know what are all the attribut

Answer 1

Have you tried ReflectionToStringBuilder? It looks like is should do what you describe.

Answer 2

I know this is a year old question, but I think it can be useful for others.

I have found a partial solution using this LOC

Field [] attributes =  MyBeanClass.class.getDeclaredFields();

Here is a working example:

import java.lang.reflect.Field;

import org.apache.commons.beanutils.PropertyUtils;

public class ObjectWithSomeProperties {

    private String firstProperty;

    private String secondProperty;


    public String getFirstProperty() {
        return firstProperty;
    }

    public void setFirstProperty(String firstProperty) {
        this.firstProperty = firstProperty;
    }

    public String getSecondProperty() {
        return secondProperty;
    }

    public void setSecondProperty(String secondProperty) {
        this.secondProperty = secondProperty;
    }

    public static void main(String[] args) {

        ObjectWithSomeProperties object = new ObjectWithSomeProperties();

        // Load all fields in the class (private included)
        Field [] attributes =  object.getClass().getDeclaredFields();

        for (Field field : attributes) {
            // Dynamically read Attribute Name
            System.out.println("ATTRIBUTE NAME: " + field.getName());

            try {
                // Dynamically set Attribute Value
                PropertyUtils.setSimpleProperty(object, field.getName(), "A VALUE");
                System.out.println("ATTRIBUTE VALUE: " + PropertyUtils.getSimpleProperty(object, field.getName()));
            } catch (Exception e) {
                e.printStackTrace();
            }

        }
    }
}

Answer 3

get all properties/variables ( just the name ) using reflection. Now use getProperty method to get the value of that variable