Programmer Group

1 Overview Spring Cloud is based on Spring Boot, which provides several components to help enterprises build micro-service systems. The main functions it provides are: Service Registry/Service Registration/Service Call/Load Balancing/Circuit Breaker, etc. Generally, it uses the existing open source software, which is based on the concept of Spr ...

Overview of JDBC JDBC (Java Database Connectivity) is a set of interface to connect database provided by Java language. The implementation of interface is called database driver in JDBC and is provided by major database manufacturers. The reason for this is that the user doesn't need to care about how the underlying implementation is imple ...

PAT (Basic Level) Practice (Chinese) 1058 multiple choice questions (20 points) Title Description It is more troublesome to correct multiple-choice questions. This topic asks you to write a program to help the teacher correct multiple-choice questions and to point out which one has the most errors. Input Format The input gives two positiv ...

1. Filters Concept: vue.js allows for custom filters and can be used as some common text formatting (further processing of data) Filters are only used in two places: mustache interpolation expression, v-bind expression The filter should be added to the end of the JavaScript expression, indicated by the "pipe" symbol (pipe: |) Globa ...

Servlet&HTTP&Request Notes 1. Architecture of Servlet Servlet - Interface GenericServlet - Abstract Class HttpServlet - Abstract Class GenericServlet: Default empty implementation of the rest of the Servlet interface, using only the service() method as an abstraction When defining a Servlet class in the future, you can inherit t ...

1. Java multithreading related concepts 1. Process It is the second execution of the program and the unique unit of the system for resource allocation and scheduling. Each process has its own memory space and system resources 2. Thread Multiple tasks can be executed in the same process. Each task can be regarded as one thread. Each p ...

Interpolation operation of template syntax (1)v-html inserts HTML text into the tag; (2)v-text inserts ordinary text into the label (the label cannot be parsed); (3)v-pre directly displays the syntax on the interface; (4)v-cloak hides the display of beard syntax on the interface before rendering the data to the page. The code is as follo ...

There are @ Before, @ After, @ Around, @ AfterRunning annotations in AOP.First up and down their own code, defined the definition of tangent point@Aspect @Component public class LogApsect { private static final Logger logger = LoggerFactory.getLogger(LogApsect.class); ThreadLocal<Long> startTime = new ThreadLocal<>(); ...

This article was originally published by RT thread forum user @ recan: https://club.rt-thread.org/as...1 problem scenarioI believe many people, like me, have just come into contact with RT thread and are on the way to learn RT thread. However, learning an embedded real-time operating system without a hardware development board, in my previous u ...

Merge sort 🎈🎆🎇 preface: 1, Priority queue heap PriorityQueue 2, Deep understanding of fast scheduling and optimization The number of times that merge sort is often tested in the eight sorts can be said to be among the best, and its status is also very high, which can not be ignored. In the sort of quick sort, merge sort and heap s ...