1.基于jdk8与本地

    环境准备

  1)下载jdk8并安装

 2）下载maven 3.6.3并解压放入D盘maven目录下，去掉外层

    设置阿里源

     

打开settings.xml,在mirrors标签之内增加，注意粘贴后</id>中的/有可能被删掉，要自己补上
 

    <mirror>

        <id>nexus-aliyun</id>

         <mirrorOf>central</mirrorOf>

          <name>Nexus aliyun</name>

        <url>http://maven.aliyun.com/nexus/content/groups/public</url>

     </mirror>

大概位置

 

     再建立一个reposity

    

 3）idea关闭项目

    

All settings

overide都要选

 新建项目

   

注意server url要改成aliyun，才能在JDK中选到1.8   JAVA 8

https://start.aliyun.com/ 

选择aliyun也有代价，就是 pom没有parent标签，但没什么影响

另外即使没有启动按钮（就是下面右边绿色箭头），需要自己配置

  

确保这里已经选择

在Edit configuration中修改

引入mybaitis-plus

   

   <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.5.1</version>
        </dependency>

pom.xml全文是： 

<?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>
    <groupId>com.i7i8i9</groupId>
    <artifactId>eleven</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>eleven</name>
    <description>eleven</description>
    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <spring-boot.version>2.6.13</spring-boot.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>2.2.2</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.5.1</version>
        </dependency>
        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-connector-j</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>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>${spring-boot.version}</version>
                <configuration>
                    <mainClass>com.i7i8i9.eleven.ElevenApplication</mainClass>
                    <skip>true</skip>
                </configuration>
                <executions>
                    <execution>
                        <id>repackage</id>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>

数据库配置

另外也为在新建项目时选择了mysql

 所以要进行数据库配置  main/resources下 增加application.yml

server:
  port: 9090
spring:
   datasource:
      driver-class-name: com.mysql.cj.jdbc.Driver
      url: jdbc:mysql://localhost:3306/test1?serverTimezone=GMT%2b8
      username: root
      password: 123456