Registration form of computer room charging system

Preface The charge system of the computer room has entered the registration window. I feel that the computer room is the same as many places of the students, but because the computer room is completed by myself, and the help from the outside is less, I have to sort out the logic by myself and design the code by myself (most of them are to fin ...

Added by Stevis2002 on Sun, 03 May 2020 03:38:23 +0300

Spring boot (9): spring boot uses Druid data source

Druid is a database connection pool implementation on Alibaba open source platform. It combines the advantages of C3P0, DBCP, PROXOOL and other DB pools, and adds log monitoring. It can monitor the connection of DB pool and the execution of SQL. It can be said that Druid is a DB connectio ...

Added by hpg4815 on Sun, 03 May 2020 00:27:55 +0300

Java learning notes 51 (integrated project: home accounting system)

This case almost uses all the contents of the first 50 articles to realize a simple family accounting software Function: add, delete, modify, query by criteria Required jar package: commons-dbcp-1.4.jar commons-pool-1.5.6.jar mysql-connector-java-5.1.37-bin.jar commons-dbutils-1.6.jar   Database table creation: /* Create database Name gjp ...

Added by yashvant on Sat, 02 May 2020 22:52:29 +0300

Simple operation of php and mysql

mysql is a fast, reliable and easy-to-use database system running on the server, which is often combined with php for web development. There are two ways for php to connect to mysql: mysql i ('i 'means improved): only for mysql pdo (php data objects): can be used in many databases mysqli connection mode can be divide ...

Added by hightechredneck on Sat, 02 May 2020 00:52:55 +0300

Complete experiment: statistical feature calculation of monitoring data based on spectral data

1. EXPERIMENTAL DATA Links: https://pan.baidu.com/s/1CSgRQ8OXe50ya_DwkLX8yw Extraction Code: kexq 2. Experimental Background 1.1 Experimental Background (1) On-line monitoring of power equipment On-line monitoring of power equipment refers to the continuous or periodic automatic monitoring and detection of the condition of power equipment with ...

Added by nuxy on Fri, 01 May 2020 11:58:03 +0300

Partition Mysql by day

1, Table structure CREATE TABLE `visitor_log` ( `id` bigint(20) NOT NULL AUTO_INCREMENT, `uicode` varchar(32) NOT NULL, `actcode` varchar(10) DEFAULT '', `F` varchar(30) DEFAULT '', `uid` bigint(20) NOT NULL, `element` varchar(32) DEFAULT '', `create_time` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00 ...

Added by GremlinP1R on Thu, 30 Apr 2020 10:47:10 +0300

Configure SQL Server 2019 AG in Azure CentOS VM-

Preceding text Assume you have basic knowledge of Azure and SQL Server HA Assume you have basic knowledge of Azure Cli The goal is to create an availability group with three replicas on Azure Linux VM and implement listener and Fencing configuration Environmental Science SQL Server 2019 Developer on Linux Azure VM Fencing agent Azure Cli imp ...

Added by Trey395 on Wed, 29 Apr 2020 12:50:01 +0300

gorm series - Update

Catalog Gorm update operation Update all fields Update modified fields Update selected fields No Hooks updates Batch update Update with SQL expression Modify values in Hooks Other update options Gorm update operation Update all fields Save() updates all fields of the object by default, even if you don't have an assignment. package main im ...

Added by deft on Mon, 27 Apr 2020 18:54:52 +0300

MyBatis L2 cache implementation details and precautions

Introduction to L2 cache In the first level cache mentioned above, the largest sharing range is within a SqlSession. If multiple sqlsessions need to share cache, they need to use the second level cache. After the second level cache is enabled, the cachenexecutor will be used to decorate the Executor. Before entering the query process of the fir ...

Added by sabien on Mon, 27 Apr 2020 12:20:29 +0300

java jdbc ResultSet results are assigned to Java objects through java reflection

In the case of unconformity framework, when using jdbc to read data from the database, we have to get and set one by one, which is not only tedious but also not concise. So we write a tool class using java reflection mechanism, so it is not so troublesome to use jdbc to get data from the database. Because in many cases there is more than one p ...

Added by jdpatrick on Fri, 24 Apr 2020 19:05:46 +0300