Programmer Group

Endless Pit: Pages in the Background Eye Finally, I finished the first phase of the project. Although the results were good, the process was painful. Communication with the front desk is more than half of my development time. Eventually abandoned vue.JS because it was compatible with ie 8, abandoned the static page because there were not enou ...

Learn about last command and its data source under linux last Data sources: / var/log/wtmp (default record of login times and duration per user, etc.) and / var/log/btmp (details, including login failure requests)Data source format: binary (read through dump-utmp command) Last [-adRx][-f][-n] [Account Name...] [Terminal Number...] Fig ...

3.7 Load Balancing Setup 3.7.1 Environment Architecture Figure 3.7.1 nginx environment architecture diagram   3.7.2 Install dependency packages Command: #yum -y install gcc pcre-devel zlib-devel openssl-devel   3.7.3 Upload the Nginx and Keepalived installation packages to the server Upload nginx-1.6.2.tar.gz and keepali ...

Recently, when using the system, users generally feedback a question: When switching responsibilities, it's very slow. It takes about 5 seconds. Sometimes it takes more than seven seconds. In the following figure, it often takes about 5 seconds to switch to another duty after the point is determined. How to deal with this problem? In fact ...

Now more and more popular micro-service architecture, mention the micro-service architecture, you can think of spring boot and vertx bar! The former is more listened to than communicated, but today I share with you the latter vertx. For more information, read the vertx website http://vertx.io/docs/vertx-we... No more nonsense, go straight to ...

Let me start with some personal opinions on login authentication codes. Users are not advised to enter authentication codes when they first log in, which has been well demonstrated on many websites. Only when users input authentication codes three or more times in a row will users be required to enter authentication codes. It is better not to ...

First, we need to import the jar package of hibernate. Under the lib folder, there is a necessary folder to import the jar package inside. The second step is to create the ORM mapping file under the bean package and put it together with the beans to be mapped. Then we import the constraints. We don't have to memorize them. We can Under th ...

It seems that most of the Java Web community still knows Kaitao's name. Many people's introductory tutorials such as spring mvc, spring, shiro started with Kaitao's blog. Shiro's single-user login function is also referenced from Kaitao's blog code. Chapter 18 Concurrent Login Number Control --"Learn Shiro from Me" Then the realizat ...

Summary: Labels PostgreSQL, PostGIS, box, grid, pointcloud, pgpointcloud, point aggregation, KNN, auto-driving, auto-distribution, scenes of science fiction movies with unmanned backgrounds are gradually changing from screen to reality with the development of technology. Label PostgreSQL, PostGIS, box, grid, pointcloud, pgpointcl ...

In the previous article, we drew the initial interface of gesture unlocking based on canvas principle. We also know that the difficulty of gesture unlocking is not the drawing of the initial interface, but a series of changes in the interface during gesture movement, including the color changes of touched points and the added line paths, which ...