获取对象属性值，支持嵌套属性

getProperty

    /**
     * 获取对象属性值，支持嵌套属性（like el表达式）
     * @param obj 
     * @param property p1.p2
     * @return
     */
    public static Object getProperty(Object obj, String property) {
        if (obj == null || StringUtil.isBlank(property))
            return null;
        String[] propertyArray = property.split("\\.");
        Object value = null;
        int methodCount = 0;
        Class<?> actualEditable = obj.getClass();
        PropertyDescriptor[] targetPds = BeanUtils.getPropertyDescriptors(actualEditable);
        for (PropertyDescriptor targetPd : targetPds) {
            Method readMethod = targetPd.getReadMethod();
            if (readMethod != null && targetPd.getName().equals(propertyArray[0])) {
                try {
                    value = readMethod.invoke(obj);
                    methodCount ++;
                    if (propertyArray.length > 1) {
                        value = getProperty(value, propertyArray[1]);
                    } 
                    break;
                }    
                catch (Throwable ex) {
                    throw new FatalBeanException("Could not read properties from obj", ex);
                }
            }
        }
        if (methodCount == 0) {
            throw new NotReadablePropertyException(actualEditable, propertyArray[0]);
        }
        return value;
    }