Black horse shopping mall -- 11. Order, inventory, wechat code scanning payment
Learning objectives
Configuration of login page
Login successful jump implementation
Implementation of settlement page query
Order implementation
Change stock
Add points
Introduction to payment process
Introduction to wechat code scanning payment
1 login page configuration
The previous use ...
Posted by netdog on Wed, 19 Feb 2020 23:02:45 -0800
Java Servlet and MVC programming mode
Servlet
Servlet is the foundation of JSP (Java Servlet Pages), which is essentially a Java class running on the server side, receiving requests from clients and responding.
Tomcat's containers are divided into four levels: Container, Engine, Host and Servlet. The relationship is as follows
The s ...
Posted by BoukeBuffel on Wed, 19 Feb 2020 22:40:41 -0800
hibernate tutorial note 3
Why to learn HQL (hibernate query language) - > this is an official recommendation with powerful functions
? delete
Session.delete (object) - > batch delete
Add?
session.save session.persist
Modify - > batch modify
Sessin.update (object)
Query object obj
obj.setXXX();
Query?
load get
Query all ...
Posted by trilbyfish on Mon, 17 Feb 2020 00:38:56 -0800
ENSP -- vgmp and HRP protocol -- dual hot standby of firewall
1, Introduction of firewall hot standby
Overview of dual hot standby
Dual hot standby is to solve single point of failure and realize smooth transition of business (session table needs to be synchronized)
The hot standby modes of Huawei firewall include: hot standby mode and load balancing mode
...
Posted by biannucci on Sun, 16 Feb 2020 04:19:09 -0800
springboot2.0 + websocket + android client practice
brief introduction
WebSocket is a protocol in HTML5. It supports persistent connection and can effectively solve the problem of polling when data synchronization between client and server.
Design sketch
Server side
Create a web project (omitted here)
Introduce websocket maven dependency (supported only when springboot ...
Posted by philspliff on Sat, 15 Feb 2020 12:16:17 -0800
Fundamentals of Web development JavaScript-16
Common properties of window in JS
Case demonstration:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>window Common attributes</title>
<script type="text/javascript">
//Hyperlink and location can realize page Jump,
//Hyperlinks are simple, but location is more f ...
Posted by tryton on Sat, 15 Feb 2020 08:55:11 -0800
Based on Python POC framework
0. Preface
Because the epidemic is busy with other things for a long time, I don't want to see a more complete poc framework and principles here to share with you to learn and discuss.
1. The frame code is as follows
#!/usr/bin/env python
#coding:utf-8
import requests
class misiinfo(object):
...
Posted by john_zakaria on Sat, 15 Feb 2020 00:11:54 -0800
Talk about the FederatedQueue of artemis
order
This paper mainly studies the FederatedQueue of artemis
FederatedQueue
activemq-artemis-2.11.0/artemis-server/src/main/java/org/apache/activemq/artemis/core/server/federation/queue/FederatedQueue.java
public class FederatedQueue extends FederatedAbstract implements ActiveMQServerConsumerPlugin, Serializable {
private static final Logg ...
Posted by sachavdk on Fri, 14 Feb 2020 09:32:43 -0800
How to use Google's cloud computing resources (Google Colab) to train their own neural network and the application of model preservation and transplantation
The rise of deep learning has brought us new efforts and trial directions, and also brought higher requirements for the computing power of machines. GPU acceleration is the key to improve computing speed, but for most people, buying a good video card is too expensive. If you are not a local tyrant, i ...
Posted by blurredvision on Fri, 14 Feb 2020 05:35:54 -0800
Java realizes online examination system (administrator function)
In this examination system, the three roles of administrator, teacher and student are equivalent to three systems.Online examination system administrator login pageSubject management page (subject can be added, deleted, modified and checked)
/**
* Query accounts in pages and show them to the page
* ...
Posted by Sfoot on Fri, 14 Feb 2020 05:10:24 -0800