首先要明白数据的流通方向

 

数据的触发是前端请求后端引起的，遵循传统的mvc规范的话 我们需要pojo mapper service controller 四个层次，Pojo 是于数据库中字段直接对应的

 

在线搭建一个springboot项目

 

https://start.spring.io/

 

其中需要加入的四个依赖

 

点击确定 把没有用的文件删除 最后保留一下两个

 

在此处添加jdk的版本

 

开始编写接口实现

 

pon.xml

 

<?xml version="1.0" encoding="UTF-8"?>

 

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

 

xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">

 

<modelVersion>4.0.0</modelVersion>

 

<parent>

 

<groupId>org.springframework.boot</groupId>

 

<artifactId>spring-boot-starter-parent</artifactId>

 

<version>2.6.2</version>

 

<relativePath/> <!-- lookup parent from repository -->

 

</parent>

 

<groupId>com.example</groupId>

 

<artifactId>demo</artifactId>

 

<version>0.0.1-SNAPSHOT</version>

 

<name>demo</name>

 

<description>Demo project for Spring Boot</description>

 

<properties>

 

<java.version>1.8</java.version>

 

</properties>

 

<dependencies>

 

<dependency>

 

<groupId>org.springframework.boot</groupId>

 

<artifactId>spring-boot-starter-web</artifactId>

 

</dependency>

 

<dependency>

 

<groupId>org.mybatis.spring.boot</groupId>

 

<artifactId>mybatis-spring-boot-starter</artifactId>

 

<version>2.2.1</version>

 

</dependency>

 

<dependency>

 

<groupId>mysql</groupId>

 

<artifactId>mysql-connector-java</artifactId>

 

<scope>runtime</scope>

 

</dependency>

 

<dependency>

 

<groupId>org.projectlombok</groupId>

 

<artifactId>lombok</artifactId>

 

<optional>true</optional>

 

</dependency>

 

<dependency>

 

<groupId>org.springframework.boot</groupId>

 

<artifactId>spring-boot-starter-test</artifactId>

 

<scope>test</scope>

 

</dependency>

 

</dependencies>

 

<build>

 

<plugins>

 

<plugin>

 

<groupId>org.springframework.boot</groupId>

 

<artifactId>spring-boot-maven-plugin</artifactId>

 

<configuration>

 

<excludes>

 

<exclude>

 

<groupId>org.projectlombok</groupId>

 

<artifactId>lombok</artifactId>

 

</exclude>

 

</excludes>

 

</configuration>

 

</plugin>

 

</plugins>

 

</build>

 

</project>