Quickly master MyBatis framework

Article catalogue 1, Foreword 1.1 database and table1.2 entity class1.3 MyBatisX plug-in1.4 SQL log view configuration 2, Multi table query 2.1 one to one2.2 one to many 3, Dynamic SQL usage 3.1 < if > label3.2 < trim > label3.3 < where > label3.4 < set > label3.5 < foreach > label 1, Forewor ...

Posted by mithras on Sat, 30 Jul 2022 21:38:10 +0300

Springboot Alipay sandbox payment - complete and detailed steps

1. Enter Alipay development platform sandbox environment Sandbox environment - Alipay Document Center 1.1. Enter personal sandbox environment Click to enter the sandbox environment and log in with Alipay Sandbox management interface is shown in the figure appid, Alipay gateway, custom key, etc Here is the account number and password of ...

Posted by Mike-2003 on Sat, 30 Jul 2022 21:14:49 +0300

952. Calculate the maximum component size according to the common factor: enumerating prime factors + parallel search set application questions

Title DescriptionThis is from LeetCode 952. Calculate the maximum component size by common factor , difficulty is difficulty.Tag: "Mathematics", "joint search set"Given a non empty array num composed of different positive integers, consider the following figure:There are num.length nodes, marked from num[0] to num[num.length ...

Posted by patrickrock on Sat, 30 Jul 2022 10:13:45 +0300

Basic operation of Linux

Linux command 1. Simple system command # View ip address ip a ip addr # ping network (test network connectivity) ip Of the target machine ip # View system time date # cancellation logout # Shut down shutdown now # restart reboot # Clear screen clear 2.Linux file system LinuxmeaningWindows/binStorage location of basic commands avai ...

Posted by turboprop on Sat, 30 Jul 2022 10:06:04 +0300

Basic syntax of MySQL DDL and DML and DQL

preface SQL statement, namely structured query language, is a programming language for special purposes. It is a database query and programming language, which is used to access data, query, update and manage relational database systems. It is also an extension of database files. The SQL statements specified in the SQL standard are divided in ...

Posted by Noctagon on Sat, 30 Jul 2022 09:58:45 +0300

Automatic recognition of nucleic acid detection time by software using OpenCV

Question introduction In the program engineering training course, a problem occurred: Mobile phone screenshot nucleic acid detection report, using OpenCV software to automatically identify whether the time for nucleic acid detection is within 72 hours. I. Preparations Software needed to accomplish this task: - Python3.x - OpenCV-Py ...

Posted by fitzromeo on Sat, 02 Jul 2022 22:04:45 +0300

ECharts Introduction to Data Visualization

Catalog One: What is ECharts 2: Introduction to Echarts 3. Main related configurations (commonly used) Fourth: Common charts for ECharts 4.1. Column Chart 4.2 Line Chart One: What is ECharts ECharts is a JavaScript-based database of data visualization charts that provide intuitive, vivid, interactive and customizable data visuali ...

Posted by badgoat on Sat, 02 Jul 2022 21:48:18 +0300

Programming problems related to C++ Dijkstra algorithm

#include<iostream> using namespace std; #define N 10000 #define Linit 11 void Dijstra(int edges[][Linit], int origin, int* dist, int* path); int main() { char str[200] = {'1','-','4',',','1','-','6',',','2','-','4',',','2','-','6',',','3','-','5',',','3','-','6',',','4','-','5',',','5','-','6'}; int origin = 1; int target = 3; in ...

Posted by dirkbonenkamp on Sat, 02 Jul 2022 21:45:03 +0300

c language implementation of queue

Sequential implementation of queues typedef struct{ int data[MaxSize]; int front,rear; } SqQueue; For the initialization of the sequence queue, front points to the queue head element, and rear points to the next position of the queue tail element, that is, the next position that should be inserted. void Init(SqQueue q){ q.front=0 ...

Posted by natbrazil on Fri, 01 Jul 2022 21:46:43 +0300

python based integrated student information management system for teachers and students -- python final design!!!

System introduction The system uses python language for program design. The main contents of the design can be summarized as follows: the teacher-student integrated student information management system, first of all, the administrator (teacher) adds, deletes, modifies, finds and exports student information (in the form of excel form), and the ...

Posted by narch31 on Fri, 01 Jul 2022 21:35:10 +0300