get Java Bean Properties - Java Reflection

Java examples for Reflection:Java Bean

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Description

get Java Bean Properties

Demo Code


//package com.java2s;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.HashMap;

public class Main {
    public static void main(String[] argv) throws Exception {
        Object bean = "java2s.com";
        Class beanClass = String.class;
        System.out.println(getJavaBeanProperties(bean, beanClass));
    }//  ww w  . j  a  v a 2s.  c  o m

    public static HashMap getJavaBeanProperties(Object bean, Class beanClass) {
        HashMap valueMap = new HashMap();
        if (!beanClass.isInstance(bean)) {
            return valueMap;
        }
        PropertyDescriptor propDesc = null;
        Field[] fields = beanClass.getDeclaredFields();
        for (int i = 0; i < fields.length; i++) {
            try {
                propDesc = new PropertyDescriptor(fields[i].getName(),
                        beanClass);
            } catch (Exception e) {
            }
            Method readMethod = propDesc.getReadMethod();
            try {
                Object propValue = null;
                propValue = readMethod.invoke(bean, new Object[] {});
                valueMap.put(fields[i].getName(), propValue);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        return valueMap;
    }
}

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