Java 根据bean字段名获取bean属性的名称

Posted 2023-02-17 wb54979

/**
     * 根据匿名函数，获取bean 属性名称 <br>
     * <li>BeanMapUtils.getBeanFunName(UserInfoDO::getCreateTime) = createTime</li>
     * <li>BeanMapUtils.getBeanFunName(UserInfoDO::isOk) =  ok</li>
     *
     * @date 2021-06-04 15:54
     */
    public static <T> String getBeanFunName(Property<T, ?> property) 
        try 
            Method declaredMethod = property.getClass().getDeclaredMethod("writeReplace");
            declaredMethod.setAccessible(Boolean.TRUE);
            SerializedLambda serializedLambda = (SerializedLambda) declaredMethod.invoke(property);
            String method = serializedLambda.getImplMethodName();

            String attr;
            if (method.startsWith("get")) 
                attr = (char) (method.charAt(3) + 32) + method.substring(4);
             else if (method.startsWith("is")) 
                attr = (char) (method.charAt(2) + 32) + method.substring(3);
             else 
                throw new IllegalStateException("无法处理的方法名" + method);
            
            return attr;
         catch (ReflectiveOperationException e) 
            throw new RuntimeException(e);
        
    

    public interface Property<T, R> extends Function<T, R>, Serializable