我在阿里轻量应用服务器搭建ftp服务器这篇博客中把防火墙换为iptables,因为当时无论我怎么设置firewalld,就是无法访问ftp服务器,今天在翻看其他博客的时候,突然发现firewalld有打开服务这么一个命令,然后我就找到了解决的办法.查看当前开了哪些端口其实一个服务对应一个端口,每个服务对应/usr/lib/firewalld/services下面一个xml文件。firewall-c
一、前言 由于之前写过的一片文章 (java接口签名(Signature)实现方案 )收获了很多好评,此次来说一下另一种简单粗暴的签名方案。相对于之前的签名方案,对body、paramenter、path variable的获取都做了简化的处理。也就是说这种方式针所有数据进行了签名,并不能指定某些数
Given a binary tree, determine if it is a complete binary tree. Definition of a complete binary tree from Wikipedia:In a complete binary tree every le
There are 8 prison cells in a row, and each cell is either occupied or vacant. Each day, whether the cell is occupied or vacant changes according to t
Given an array A of integers, a ramp is a tuple (i, j) for which i < j and A[i] <= A[j]. The width of such a ramp is j - i. Find the maximum width of
In a array A of size 2N, there are N+1 unique elements, and exactly one of these elements is repeated N times. Return the element repeated N times. Ex
JDK与Cglib代理对比 1、JDK只能针对有有接口类的接口方法进行动态代理 2、Cglib基于继承来实现代理,无法对static、final类进行代理 3、Cglib基于继承来实现代理,无法对private、static方法进行代理
Preface The first time I met .sync modifier, I didn't know it very well. So, I seldom use that. Today, I am going to get it. Main In the past, I use “
此文已由作者郑华斌授权网易云社区发布。 REST这词我们常常挂在嘴边,比如“开发一个rest接口”,又比如Spring项目的代码: CommonController使用了@RestController注解,顾名思义,告诉读者这是一个Rest接口的实现。然而以@RestController注解的接口却
前几天在写《HashMap 和 Hashta...
Given an array of integers A with even length, return true if and only if it is possible to reorder it such that A[2 * i + 1] = 2 * A[2 * i]for every
大家应该都看到过机器人的手臂啊腿脚啊什么的一抽一抽的在动弹吧...是不是和机械舞一样的有节奏,现在很多机器人模型里面的动力器件都是舵机。但是大家一般见到的动力器件都是像步进电机,直流电机这一类的动力器件,应该对舵...
版权声明:如需转载本文章,请保留出处! https://blog.csdn.net/xc_zhou/article/details/806377141.TornadoTornado:python编写的web服务器兼web应用框架1.1.Tornado的优势轻量级web框架异步非阻塞IO处理方式出色的抗负载能力优异的处理性能,不依赖多进程/多线程,一定程度上解决C10K问题WSGI全栈替代产品,推荐
四、写入数据 在C# Redis实战(三)中我们已经配置好了web.config程序,并且能通过C#代码来读取和管理以上配置信息。 接下来,就可以进行Redis的数据写入了。Redis中可以用Store和StoreAll分别保存单条和多条数据,C#中具体代码如下: 1、保存多条数据 [csharp]
In a deck of cards, every card has a unique integer. You can order the deck in any order you want. Initially, all the cards start face down (unreveale
For a binary tree T, we can define a flip operation as follows: choose any node, and swap the left and right child subtrees. A binary tree X is flip e
Given an array of 4 digits, return the largest 24 hour time that can be made. The smallest 24 hour time is 00:00, and the largest is 23:59. Starting f
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