DJango background design

  I. create administrator Django provides admin background for unified management of users, permissions and permission groups, and super user initialization method. Initialize command line: python3 manage.py createsuperuser Follow the prompts to set the user name, mailbox, and password: User ...

Posted by divadiva on Mon, 28 Oct 2019 14:34:07 -0700

Spring Kafka - KafkaListener starts and stops regularly

I. application scenario of timing start For example, in the stand-alone environment, we need to use Kafka for data persistence. Since the active time of users is from 10 a.m. to 12 p.m., a large amount of data persistence in this time period may affect the performance of the database and lead to the decrease of user experience. We can choo ...

Posted by strago on Mon, 28 Oct 2019 14:15:34 -0700

oracle+mybatis bulk insert data

1.Oracle batch operation My watch structure is 1.1 batch insertion 1.1.1 primary key does not use sequence insert into students(sid,sname,ssal,ssex) select 9,'Zhang San',3000,'male' from dual union all select 10,'Li Si',4000,'male' from dual union all select 11,'Xiaohong',5000,'female' from dual ...

Posted by Alkimuz on Mon, 28 Oct 2019 08:29:39 -0700

java ThreadLocal thread setting private variable bottom source code analysis

I've heard that ThreadLocal is used to achieve high concurrency. Previously, it was implemented with locks. After reading a lot of data, I found that there is a big difference (it seems that ThreadLocal is not a high concurrency solution strictly). Now let's summarize. The problem in high concurrency is thread safety, which can be said to be h ...

Posted by storyboo on Mon, 28 Oct 2019 05:57:26 -0700

Multiplayer blog development project - back end

Basic analysis 1 Analysis For the blog system used by many people, the BS architecture is adopted here.Blog system needs user management and blog management User management: user registration, adding, deleting, modifying and querying users Blog management: add, delete, change and check blog The database is required. This time, Mysql5.7.17 is ...

Posted by gbow on Mon, 28 Oct 2019 04:13:45 -0700

Python Road [chapter 29]: django ORM model layer

ORM introduction An important part of MVC or MVC framework is ORM, which realizes the decoupling of data model and database, that is, the design of data model does not need to rely on specific database, and the database can be easily replaced through simple configuration, which greatly reduces the workload of developers and does not need to f ...

Posted by aximbigfan on Sun, 27 Oct 2019 23:49:45 -0700

iClient for OpenLayers drawing graphics library

iClient for OpenLayers drawing graphics library By yangjl In the process of support, I once met a small customer partner who asked me how to store the drawn graphics. In fact, there are many ways. I chose a simpler way to create my own service by using nodejs and connect mysql to store the graphics ...

Posted by kbrij on Sun, 27 Oct 2019 20:06:31 -0700

Forum and background built with node+mongodb

Forum and background built with node+mongodb This is the first project background that I have done. If there are any inappropriateness and correction, please give me more advice. This project is only for reference! Thank you. I put the source code at the bottom of the article. If you need it, you can ...

Posted by curb on Sun, 27 Oct 2019 05:23:53 -0700

Using Mockito in Spring Boot projects

This article first appeared on personal website: Using Mockito in Spring Boot projects Spring Boot can work with most popular testing frameworks: create unit tests through Spring JUnit; generate test data to initialize the database for testing; Spring Boot can work with BDD (behavior driven development) tools, Cucumber and Spock to test applic ...

Posted by WendyLady on Sun, 27 Oct 2019 03:25:22 -0700

Introduction to SQL server manual injection

Catalog 0x01 SQL server Foundation 0x02 basic injection Some versions of SQL server have been installed by hackers. Please check the details at the end of this article. 0x01 SQL server Foundation Before learning to inject, the most important thing is to understand the specific things of SQL server, so as to better inject operations. System libr ...

Posted by mikem562 on Sat, 26 Oct 2019 13:26:43 -0700