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Original link: http://www.yiidian.com/mybatis/one-to-one.html 1 What are one-to-one, one-to-many mappings? Take users and orders for example, One-to-one: An order belongs to only one user==>The order is one-to-one with the user One-to-many: A user can have multiple orders==>A user is one-to-many with an order Note: In MyBatis, if you want ...

About the use of the mybatis generator plug-in, the main task is to write the configuration file of the plug-in. The database information used in this instance is as follows. The database name is world, including three tables: city, country, and country The structure of the city table is as follows: The country table structu ...

1 background When using the paging function of mybatis plus (hereinafter referred to as MBP). Found a JsqlParserCountOptimize The official didn't give a detailed introduction to the paging optimization processing class of, and didn't find a few words on the Internet to analyze the logic of this class, which we dare not use. It's also convenient ...

origin In the process of using mybatispree, it is found that an error will be reported if an insert is executed and a batch insert is executed in a transaction Cannot change the ExecutorType when there is an existing transaction [the external link image transfer failed. The source station may have ant ...

SpringBoot +Spring Security + thymeleaf + layui Program ideas and resource sources: Wx Java wechat working number original demo NatApp intranet penetration layuimini background template Wechat work number interface test number acquisition This is written for the purpose of binding the WeChat official a ...

Integration steps Import related jar package <!--junit--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency> <!--mybatis--> <dependency> <groupId>org.mybatis& ...

Interface display Highlights: The color and length of the card can be changed randomly, and the page length layout can be adaptive. Users can click like. Get ready MySQL A message table:Message: message content; username: processed by the backend. If the submitted one is empty, set the name to ...

1, Add startup dependency Add dependency in maven file of spring boot project as follows: <properties> <java.version>1.8</java.version> <druid.version>1.1.13</druid.version> <mybatis.version>2.1.0</mybatis.version> <druid ...

1. Create database first 2. Create project 3. Import required coordinates 4. Configure mybatis (using annotation method), and write SqlMapConfig.xml, the content is as follows (Dao layer configuration), and test <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE configuration PUBLI ...

Article directory 1, Setting up the environment 1. Create Maven project 2. Import dependency 1. Version lock 2. Import dependencies dependencies 3. Write entity class 2, Integration 1. Configure SqlMapConfig.xml 2. Configure springmvc.xml 3. Configure applicationContext.xml (the commonly used na ...