Programmer Group

A few days ago, when moving the house, I picked up the book refactoring -- improving the design of existing code. Refactoring is often and often used in development.She did teach us how to write programs concise, clear, easy to understand, easy to maintainWrite something about refactoring for the blog today. Take the actual example of netizens ...

The foregoing: QQ: 961209458 V X: F9986858 Undertake graduation project. function 1. Use the 4 * 4 matrix key to enter the password 2. Passwords can be generated regularly and randomly 3. There is an external EEPROM that can store passwords to prevent power loss 4. Connect the mobile phone to Bluetooth and input specific instructions to obtai ...

Mybatis-9.28 Environmental Science: JDK1.8 Mysql 5.7 maven 3.6.1 IDEA Review: JDBC Mysql Java Foundation Maven Junit SSM framework: of configuration files. The best way: look at the official website documents; 1. Introduction 1.1. What is Mybatis MyBatis is an excellent persistence layer framework It supports customized SQL, stored proced ...

Copyright notice Original author: brother Gu's younger brotherAuthor blog address: http://blog.csdn.net/lfdfhl Event handling overview In Vue, it is very convenient to handle events, such as click events, mouse over events, etc. Main steps: 1. Define the function in the methods of the Vue instance.2. Specify the event type and its corres ...

1.1 system performance information module psutil psutil is a cross platform library, which can easily obtain the process and system utilization information of the system. It is mainly used for system monitoring, analyzing and limiting system resources and process management. It realizes the functions provided by the same command-line tools. & ...

Main contents of course tasks: * SpringMVC brief introduction * SpringMVC Component overview * SpringMVC request * SpringMVC response * Static resource on I. Introduction to spring MVC 1.1 MVC mode MVC is a software architecture pattern in software engineering. It is a development idea that separates business logic and display interface. * M(m ...

Code address of this series: https://github.com/JoJoTec/sp...Scenarios requiring retryIn the microservice system, online publishing will be encountered. The general publishing update strategy is to start a new one. After successful startup, close an old one until all the old ones are closed. Spring Boot has the function of graceful shutdown, wh ...

Use Java to simulate how consumers consume messages in rabbitMQ message queue introduce General summary: the producer produces a message and stores it in the message queue in rabbitmq, and then the consumer takes the message out of the message queue. In this part of this tutorial, we will write two programs in Java. The producer who send ...

In real life, some collection objects have many different elements, and each element also has many different visitors and processing methods. For example, there are multiple scenic spots and multiple tourists in the park. Different tourists may have different comments on the same scenic spot; The prescription list issued by the hospital doctor ...

1. Use sub query to realize the menu list on the left 1.1 edit mapping file 1.1.1 Sql statement writing method of subquery /*Query level-1 menu information*/ SELECT * FROM rights WHERE parent_id = 0 /* Query from table data */ SELECT * FROM rights WHERE parent_id = 3 1.1.2 writing method of XML Mapping File <!--Data acquisition ...