Course Intermediate  4118

Course Introduction：Tomcat is a Servlet container developed by the Jakarta project under the Apache Software Foundation. According to the technical specifications provided by Sun Microsystems, it implements support for Servlets and JavaServer Page (JSP), and provides some unique functions as a Web server, such as Tomcat Management and control platform, security bureau management and Tomcat valve, etc.

Course Intermediate  5776

Course Introduction：JSON is a universal lightweight data storage and exchange format that is independent of programming languages. It is written based on JavaScript object syntax and is very suitable for Web development. Ajax is an asynchronous data loading technology that allows users to obtain data without leaving the current page. The user experience is excellent. This course combines json and ajax technologies to demonstrate the application scenarios of these two technologies with examples (the knowledge of php and mysql involved can be temporarily neglect)

Course Elementary  12464

Course Introduction："Ajax Principles Detailed Video Tutorial" The core of Ajax is the XMLHttpRequest object, referred to as XHR. It is used to enable the browser to request additional data from the server without unloading the page, which greatly improves the user experience. Prior to this, this technology actually existed and was implemented by some people, but it was not popular and was not supported by browsers. However, after that, IE5 introduced XHR objects for the first time and supported ajax technology, which was subsequently supported by all browsers.

Course Elementary  2594

Course Introduction：If you have any questions, add WeChat: Le-studyg; the course content includes the basic principles of MySQL master-slave replication, the data synchronization mechanism during the replication process, the configuration and management of the replication topology, the high availability and fault tolerance of the master-slave replication, and the replication process. Data consistency and conflict handling, etc. Through an in-depth analysis of the underlying implementation of MySQL8 master-slave replication, you will understand key mechanisms such as data flow, log transmission, and status synchronization during the replication process, and learn how to optimize and adjust the performance and stability of master-slave replication.

Course Elementary  7803

Course Introduction：HTTP communicates based on B/S architecture, and the server-side implementation programs of HTTP include httpd, nginx, etc. The client-side implementation programs are mainly web browsers, such as Firefox, Google Chrome, Safari, etc. In addition, the client's command line Tools include elink, curl, etc. Web services are based on TCP, so in order to respond to client requests at any time, the Web server needs to listen on port 80/TCP. In this way, the client browser and the web server can communicate through HTTP.

Course Intermediate  2697

Course Introduction：React has made progressive adjustments to life cycle hooks since version v16.3, and some life cycle hook functions have been abandoned and added. This course will give you a deep understanding of the old and new life cycles.

Course Elementary  4097

Course Introduction：JS is an essential part of website development. It can achieve dynamic page effects and make the visual impact of the page stronger. This lesson mainly focuses on the theme of realizing carousel effect, including native js and jquery. In native js, it mainly explains the operation of events, and uses the learned knowledge points to achieve seamless scrolling carousel effect and switching carousel effect.

Course Intermediate  11250

Course Introduction："MySQL Data Management Backup and Recovery Case Analysis Video Tutorial" MySQL is an open source small-scale relational database management system. Currently, MySQL is widely used in small and medium-sized websites on the Internet. Due to its small size, fast speed, low total cost of ownership, and especially the characteristics of open source, many small and medium-sized websites choose MySQL as their website database in order to reduce the total cost of website ownership.

Course Intermediate  8354

Course Introduction：Many programmers who have worked for many years still have a very basic understanding of databases. They are confused as soon as they go out for interviews. They don’t understand basic SQL statements, more complex SQL queries, and SQL statement optimization. They don’t even know how to use them. Redis improves system performance and can withstand tens of millions of concurrencies. This set of courses will help you thoroughly understand MySQL locks, execution plans, indexes, MVCC & Redis transactions, cache, breakdown, penetration, avalanche, warm-up, etc., and you can complete all database interviews in one set!

Course Elementary  2347

Course Introduction：If you have any questions, please add us on WeChat: Le-studyg; the course content includes the basic principles of Nginx load balancing, load balancing algorithms, health check and failover, dynamic load balancing configuration, etc. Through an in-depth analysis of the principles and implementation details of Nginx load balancing, you will learn key knowledge such as how load balancing works, algorithm selection, and configuration tuning, and learn how to use this knowledge to manually write a simple load balancer. Whether you want to deeply understand the principles and internal mechanisms of Nginx load balancing, or you want to learn how to manually write a simple load balancer, this course will provide you with comprehensive guidance and practical experience. Whether you are a beginner or an experienced developer, you can gain practical knowledge and skills from this course and improve your capabilities in the field of load balancing.