BeanUtils.java 文件源码

/**
 * 获取Bean的属性
 * @param bean bean
 * @param propertyName 属性名
 * @return 属性值
 */
public static Object getProperty(Object bean, String propertyName) {
    PropertyDescriptor pd = getPropertyDescriptor(bean.getClass(), propertyName);
    if (pd == null) {
        throw new RuntimeException("Could not read property '" + propertyName + "' from bean PropertyDescriptor is null");
    }
    Method readMethod = pd.getReadMethod();
    if (readMethod == null) {
        throw new RuntimeException("Could not read property '" + propertyName + "' from bean readMethod is null");
    }
    if (!readMethod.isAccessible()) {
        readMethod.setAccessible(true);
    }
    try {
        return readMethod.invoke(bean);
    } catch (Throwable ex) {
        throw new RuntimeException("Could not read property '" + propertyName + "' from bean", ex);
    }
}