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Recently, I studied the underlying code of Mybatis, and prepared to write a small tool to operate the database, which realized some functions of Mybatis. 1. SQL statements are configured in mapper.xml. 2. Support input of int, String and custom data ...

Preparatory tool: IDEA jdk1.8 Navicat for MySQL Postman   New Project Selection dependency: mybatis Web Mysql JDBC Project structure pom dependency: 1 <?xml version="1.0" encoding="UTF-8"?> 2 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 3 xsi:schemaL ...

Create autocrawler files with commands Creating crawler files is based on the master scrapy to create crawler files Scrapy genspider-l View scrapy's available master for creating crawler files Available templates: Master descriptionCreate basic crawler files crawl Create Autocrawler FilesCreate crawler files for crawling csv data Create crawli ...

1. Introduction to Tomcat Services Tomcat server is a free, open source Web application server. It is a lightweight application server and is widely used in small and medium-sized systems and in situations where concurrent access to users is not very common. It is the preferred choice for developing and debugging JSP programs.Generally speakin ...

Full code address for this article: https://github.com/yu-linfeng/BlogRepositories/tree/master/repositories/factorybean FactoryBean and BeanFactory have long been plagued by developers because of their similarity in naming. BeanFactory, the well-known Spring core interface, provides the most basic functionality of the IoC container.But explaini ...

1. Background Recently, due to the needs of the project, we have migrated all versions of log4j 1.x to the version of log4j 2.x, and the subsequent slf4j integration log4j configuration (the perfect solution for building a project log system using Slf4j integration Log4j2) and log4j2 configuration file details require a good chat.This article i ...

Basic Ajax concepts Ajax is all called Asynchronous JavaScript and XML (asynchronous JavaScript and XML). With a small amount of data exchange with the server in the background, Ajax enables asynchronous updates to a Web page, allowing updates to ...

Keywords: spring-boot dependency management, spring-boot-dependencies, spring-boot-parent problem maven project, dependency management is a very basic and very important function. Now the project is more and more large, more and more dependencies, there are too many two-party packages and three-party packages. Dependency conflict handling is re ...

Catalog 1. Introduction 2. Custom Annotations 2.1 Definition 2.2 Test 2.3 Summary 3. Notes on Handwritten Transactions 3.1 maven dependence 3.2 Configure spring.xml file 3.3 Customize transaction annotations (by reflecting annotations on ...

Configure High Availability 1. Install zookeeper 2. Edit zoo_cfg in the conf folder under the installation zookeeper directory If not, copy zoo_ (add to the ip address of the three machines, create a directory, create myid under the directory, ...