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Consider the following four test methods, and what do they output? public class Test {     public static void main(String\[\] args) {         System.out.println(test1());         System.out.println(test2());         System.out.println(test3());         System.out.println(test4());     }     private static int test1() {         int i = ...

Spring boot2. X Quick Start Guide (1) preparation IDE: IntelliJ IDEA 2020.3 Java environment jdk1.8 Quickly create spring boot project on the official website Now let's get to the point:Get into https://start.spring.io/ Build an initial projectHere you will download a zip project package Using Maven to import the Spring Boot project Rememb ...

Recently, you need to paginate the data on a page of spring MVC + mybatis project. The general idea is to create two hidden input boxes on the page to save the pageNum of the current page and the number of pieces of data displayed on each page pageSize. Modify the corresponding values each time you paginate, and then transfer the pageNum and pa ...

Author: Mona Rudowhttps://www.cnblogs.com/stateis0/p/9062171.html As we all know, the bottom layer of Dubbo, a well-known domestic framework, is Netty  As a network communication, how on earth is it used internally?Today we'll explore. 1. How Dubbo's Customer uses Netty Note: This code uses the dubbo-demo example from the Dubbo source of clo ...

background In the SpringBoot environment, we have "incomplete" annotations.This is why SpringBoot replaces the xml configuration in traditional Spring projects.When using these annotations, we must understand the principles and conventions behind these annotations. package org.springframework.boot.context.properties; import java.lang ...

Select all or none of the check boxes requirement analysis In the commodity classification interface, when we click the select all box, we want to select all the commodities. When we cancel, we want to uncheck all the commodities technical analysis checked="checked" select the check box Event: onclick click event getElementsByTagName: ...

1 Requirements One of the functions in my front-end and back-end separated lab management project is student status statistics.My design is to calculate the proportion of each state by day.For ease of calculation, at 0 o'clock a day, the system needs to reset the student's status and insert a piece of data as the start of the day.In addition, c ...

Most of the statements on the Internet are "if there is a transaction, the current transaction is supported.". Open if no transaction " It's just a silly face... My understanding at the beginning is that if the save method is called, a transaction will be opened when the transaction is executed to userMapper.save. At this time ...

Preface Recently, I have used Spring Boot with MyBatis, general Mapper plug-in and PageHelper paging plug-in to do several small and medium-sized API projects. I feel that it is very comfortable to develop this project with this set of framework and tools, and the team's response is also good. In the process of project construction and develop ...

Spring AOP-Advanced Come on, go straight to the case description: Whoop..... 1. Advanced Case 1: Defining a public entry point Sketch There are many notifications in the facet class, most of which have the same entry point. For ease of entry point management and maintenance, use a common entry point. @Pointcut Method modifier:private ...