Programming VIP

1.@RequestParam       1. It is used to receive the parameters passed by the method before the parameters passed by the method (it is an annotation that accepts common parameters in spring MVC)       2. Attribute: name in value request parameter required: whether this parameter is provided in the reques ...

Uploading files should be the most frequently encountered scenario. Today, let's simply do a Spring Boot file uploading function with you. Without much nonsense, let's start directly. The project structure is as follows: pom dependency <dependencies> <dependency> <groupId>org.springframework.boot</groupId&g ...

Deep mining of operator variables We take the characteristics of this competition as an example to describe: 1. Whether the user's real name system has passed the verification of whether 1 is yes and 0 is No. at present, in China, mobile phone cards are basically bound with ID cards. Of course, there are still business activities such as buyi ...

In the last article, we talked about the life cycle of springbeans and knew the process of instantiation, creation and destruction of springbeans, but we know that Spring supports one Bean to introduce other Bean objects, so the problem of interdependence is inevitable. How does Spring solve this problem? There are many ways for Spring to regis ...

closureSince closures are used in the implementation of throttling and anti shake functions, we will briefly introduce what closures are before understanding throttling and anti shake functions.function Add() { var x = 1; return function () { x++; console.log(x); } } var result = Add(); //Execute A function for the ...

SpringBoot+mybatisPlus+Vue to build the front desk system of student record Front and rear end separation interaction: Back end development: Use IDEA+SQLyog+Maven Version introduction: IDEA:2020.0 sqlyog:V12.14 Maven:3.8.2 MySql:8.0.2 springBoot:2.5.7 mabatisPlus:3.0.5 Content introduction: Inspired by my classmates, I found that th ...

Locking is to avoid unpredictable errors when multithreading or multiprocessing operate critical resources and ensure that the program executes in the expected order. There are many kinds of locks, several of which are introduced here. 1. Mutex mutex is a lock when a process or thread locks after entering the critical area, and other processe ...

Note: GoIndex is a Google platform deployed in Cloudflare Workers The Drive directory indexing program does not need to provide a server. It can directly list all the files on your Google online disk. At the same time, there is no need to speed up the download and access. Goindex can watch video files in some formats online. gdindex can be com ...

In my impression, a friend asked me to write an article on how to deal with unbalanced data and sort out relevant theoretical and practical knowledge long ago, so I almost have today's article. Unbalanced samples are very common in our real world, so what problems will arise when we use these unbalanced sample data in machine learning (ML)? How ...

23 visitor mode 23.1 concept Encapsulates some operations that act on each element in a data structure. New operations that act on these elements can be defined without changing the data structure. 23.2 structure Abstract visitor role: defines the behavior of accessing each element. Its parameters are the accessible elements. Theoretica ...