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Two entities: order and commodity. An order can contain multiple commodities, and a commodity can belong to multiple orders, that is, many to many.   Goods table     Order form TB: no is the order number, and the user "id is associated with the id of the user table.     You need to create a new intermediate table, order item TB, and intr ...

SpringBoot and Mybatis configure multiple data sources to connect to multiple databases Currently Mybatis is the framework for the industry to operate databases, but in many business scenarios, we need to configure multiple data sources in one project to implement business logic.You can also implement multiple data sources in SpringBoot and wr ...

Integration steps Guide bag 1.spring (including spring MVC) 2.mybatis 3. Mybatis spring integration package 4. Database drive 5. Third party connection pool. Configure the web.xml file spring listener and front-end controller as well as solving the Chinese scrambling of post submission request <?xml version="1.0" e ...

Today, when working on the project, I encountered the problem that I need to return the auto increment primary key ID of the data just inserted. I found that the getId returned from the object is always empty, and all the data I checked online are Similar to this, <insert id="insertAndgetkey" parameterType="com.soft.myba ...

When creating a spring + spring MVC + mybatis project, you first need to configure some corresponding configuration files. Here is a brief introduction of the simplest requirements for these configuration files. 1  Mybatis.xml <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xml ...

Black horse customer management system 1 System Overview 1.1 system function introduction The background of the system is written with SSM framework, and the front page uses the current mainstream Bootstrap and jQuery framework to complete the page information display function (for the knowledge of Bootstrap, interested readers can refer to the ...

Business scenario: In the actual project development, sometimes the data will be stored in multiple databases, that is, there are different data sources. So in the SSM framework, how to configure multiple databases? Get ready: Two Oracle data sources DataSource1:172.83.242.145:1521/orcl user name: zsyw · Jr password: ...

Preface Before you begin the body, explain how the Dao interface corresponds to the SQL in the XML file. At the end of a sentence, mybatis parses these xml files, establishes a relationship with Dao through the namespace ins id e the xml file, and then associates each sql in the xml with an interface in dao. The question then arises:'If I have ...

In the Spring framework, using AOP with custom annotations can facilitate the monitoring of user operations. First, build a basic Spring Boot Web environment to start Spring Boot, and then introduce the necessary dependencies: <dependency> <groupId>org.springframework.boot</groupId> <artif ...

Preface As for what spring security is, there are two main functions: user authentication and authorization. That is, we often say that users can only perform other operations after logging in. If they do not log in, they will be redirected to the login interface. Some users have permission to perform an operation, while others are authorized i ...