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Preface Author: Light as the breeze cyfDate: 2021/1/4-2021/1/11This article comes from the Comprehensive Course Design of Software Direction in Senior Three School 1. Topics and Contents of Course Design 1. Basic Facts (1) Students belong to only one class (e.g. Accounting 181) (2) There are six classes in Grade 18 of the Accounting Dep ...

This paper is a dynamic node MyBatis tutorial My study notes. Chapter I 1. Three tier architecture (1) Functions of three layers User Interface Layer: accepts user data and displays the processing results of requests, including jsp, html, servlet, etc. Corresponding controller package; Business Logic Layer: accept the data passed from the ...

1. Homepage data banner display (Backend) 1.1 create sub module service in service_cms 1.2 create profile In application.properties # Service port server.port=8004 # service name spring.application.name=service-cms # mysql database connection spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver spring.datasource.url=jdbc:mysql:/ ...

Enable binary log function Set the storage directory and file name prefix of binary log files in the configuration file / etc/my.cnf: log-bin=/var/lib/mysql/mybinlog/mysql-bin server-id=1 Enable exclusive tablespaces: innodb_file_per_table=1 explain: 1. According to the above configuration, after the database service is restarted, ...

What is the concept of GROUP BY implicit sorting in MySQL? The main reason is that other RDBMS do not have such a concept. If you have not carefully understood the concept, you will feel a little confused about it. Let's take a look at the introduction of the official document first: The chapter ". 2.1.14 ORDER BY Optimization" in th ...

Less-23 (filter annotation symbols -- union joint injection) Summary of level 23: Through manual test, it is found that # and – + are filtered in this level. We can only find ways to close single quotation marks, and there are many closing methods. There are also many closing methods in the following injection process. The rest ca ...

This article is Optimization of Java high concurrency spike API Course notes. Editor: IDEA Java version: java8 Previously: I Second kill system environment construction and DAO layer design II Second kill system Service layer III Second kill system web layer High concurrency optimization analysis Where does concurrency occur? For ...

2021SC@SDUSC First, let's list the seafobj Directory: backends utils __init__.py blocks.py commits.py commit_differ.py db.py exceptions.py fs.py objstore_factory.py Open__ init __.py: see from .commits import commit_mgr from .fs import fs_mgr from .blocks import block_mgr from .commit_differ import CommitDiffer So let's first analyze exce ...

The more you know, the more you don't know Friends who have used the Mybatis framework must have heard of PageHelper, a pagination artifact? In a simple sentence, PageHelper.startPage(pageNo,pageLimit) can help us realize paging! Did YYDS? No more nonsense, let's start exploring the mystery Daily use At present, many projects are based ...

Table association concept Table represents an entity in life, such as department table dept and employee table emp. Table association represents the relationship between tables, such as department and employee, commodity and commodity classification, teacher and student, classroom and student. At the same time, we should also know that table ...