1、创建简单Maven项目，如下

2294494-20210515093550060-1147682705.png

2、删掉src目录

3、修改字符编码，如下

2294494-20210515093558555-471479361.png

4、开启注解处理，如下

2294494-20210515093605822-23866489.png

5、选择编译版本，如下

2294494-20210515093732491-1040200639.png

6、编辑 pom.xml文件

  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:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  4.     <modelVersion>4.0.0</modelVersion>
  6.     <groupId>com.wyx</groupId>
  7.     <artifactId>Spring-Cloud</artifactId>
  8.     <version>0.0.1-SNAPSHOT</version>
  9.     <packaging>pom</packaging>
  11.     <properties>
  12.         <project.build.sourceEmcoding>UTF-8</project.build.sourceEmcoding>
  13.         <maven.compiler.source>1.8</maven.compiler.source>
  14.         <maven.compiler.target>1.8</maven.compiler.target>
  15.         <!--对应的版本-->
  16.         <spring.boot.dependencies.version>2.4.3</spring.boot.dependencies.version>
  17.         <spring.cloud.dependencies.version>2020.0.2</spring.cloud.dependencies.version>
  18.         <spring.cloud.alibaba.dependencies.version>2.2.1.RELEASE</spring.cloud.alibaba.dependencies.version>
  19.         <mysql.version>8.0.23</mysql.version>
  20.         <druid.version>1.2.5</druid.version>
  21.         <druid.spring.boot.version>1.2.5</druid.spring.boot.version>
  22.         <log4j.version>1.2.17</log4j.version>
  23.         <junit.version>4.13</junit.version>
  24.         <lombok.version>1.18.20</lombok.version>
  25.         <mybatis.spring.boot.version>2.1.4</mybatis.spring.boot.version>
  27.     </properties>
  29.     <dependencyManagement>
  30.         <dependencies>
  31.             <!--SpringBoot 依赖-->
  32.             <dependency>
  33.                 <groupId>org.springframework.boot</groupId>
  34.                 <artifactId>spring-boot-dependencies</artifactId>
  35.                 <version>${spring.boot.dependencies.version}</version>
  36.                 <type>pom</type>
  37.                 <scope>import</scope>
  38.             </dependency>
  40.             <!--Spring Cloud 依赖-->
  41.             <dependency>
  42.                 <groupId>org.springframework.cloud</groupId>
  43.                 <artifactId>spring-cloud-dependencies</artifactId>
  44.                 <version>${spring.cloud.dependencies.version}</version>
  45.                 <type>pom</type>
  46.                 <scope>import</scope>
  47.             </dependency>
  49.             <!--Spring Cloud Alibaba 依赖-->
  50.             <dependency>
  51.                 <groupId>com.alibaba.cloud</groupId>
  52.                 <artifactId>spring-cloud-alibaba-dependencies</artifactId>
  53.                 <version>${spring.cloud.alibaba.dependencies.version}</version>
  54.                 <type>pom</type>
  55.                 <scope>import</scope>
  56.             </dependency>
  58.             <!--Mysql 连接驱动-->
  59.             <dependency>
  60.                 <groupId>mysql</groupId>
  61.                 <artifactId>mysql-connector-java</artifactId>
  62.                 <version>${mysql.version}</version>
  63.             </dependency>
  65.             <!--druid 依赖-->
  66.             <dependency>
  67.                 <groupId>com.alibaba</groupId>
  68.                 <artifactId>druid</artifactId>
  69.                 <version>${druid.version}</version>
  70.             </dependency>
  72.             <!--Spring Boot 启动器-->
  73.             <dependency>
  74.                 <groupId>com.alibaba</groupId>
  75.                 <artifactId>druid-spring-boot-starter</artifactId>
  76.                 <version>${druid.spring.boot.version}</version>
  77.             </dependency>
  79.             <!--Lombok 依赖-->
  80.             <dependency>
  81.                 <groupId>org.projectlombok</groupId>
  82.                 <artifactId>lombok</artifactId>
  83.                 <version>${lombok.version}</version>
  84.             </dependency>
  86.             <!--log4j 依赖-->
  87.             <dependency>
  88.                 <groupId>log4j</groupId>
  89.                 <artifactId>log4j</artifactId>
  90.                 <version>${log4j.version}</version>
  91.             </dependency>
  93.             <!--junit 单元测试 依赖-->
  94.             <dependency>
  95.                 <groupId>junit</groupId>
  96.                 <artifactId>junit</artifactId>
  97.                 <version>${junit.version}</version>
  98.             </dependency>
  100.             <!--Mybatis-spring-boot 启动器-->
  101.             <dependency>
  102.                 <groupId>org.mybatis.spring.boot</groupId>
  103.                 <artifactId>mybatis-spring-boot-starter</artifactId>
  104.                 <version>${mybatis.spring.boot.version}</version>
  105.             </dependency>
  107.         </dependencies>
  108.     </dependencyManagement>
  110.     <build>
  111.         <plugins>
  112.             <plugin>
  113.                 <groupId>org.springframework.boot</groupId>
  114.                 <artifactId>spring-boot-maven-plugin</artifactId>
  115.                 <version>2.4.4</version>
  116.                 <configuration>
  117.                     <fork>true</fork>
  118.                     <addResources>true</addResources>
  119.                 </configuration>
  120.             </plugin>
  121.         </plugins>
  122.     </build>
  123. </project>

创建实体类API

1、在父工程下创建一个空maven项目

2294494-20210515093643234-1729014017.png

  1. springboot扫描文件```@ComponentScan(basePackages = {"com.spring.*"})```，
  2.   由此springboot启动类的包必须是项目下的父路径，其他类的包路径必须是其子路径。

即其他所有模块的包路径是springboot启动类的子路径