BeanUtils.java

package com.pro;

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;

public class BeanUtils {

	private BeanUtils() {

	}

	public static void setFieldValue(final Object object,
			final String fieldName, final Object value) {

		Field field = getDeclaredField(object, fieldName);

		if (field == null)
			throw new IllegalArgumentException("Could not find field ["
					+ fieldName + "] on target [" + object + "]");
		makeAccessible(field);
		try {
			field.set(object, value);
		} catch (IllegalAccessException e) {

		}
	}

	protected static Field getDeclaredField(final Object object,
			final String fieldName) {

		return getDeclaredField(object.getClass(), fieldName);

	}

	protected static Field getDeclaredField(final Class clazz,
			final String fieldName) {

		for (Class superClass = clazz; superClass != Object.class; superClass = superClass
				.getSuperclass()) {

			try {

				return superClass.getDeclaredField(fieldName);

			} catch (NoSuchFieldException e) {

			}
		}
		return null;
	}

	protected static void makeAccessible(Field field) {
		if (!Modifier.isPublic(field.getModifiers())
				|| !Modifier.isPublic(field.getDeclaringClass().getModifiers())) {
			field.setAccessible(true);
		}
	}
}