Intellij IDEA新建多模块项目

1、新建空项目（等同于NET解决方案sln）

一种是：从Maven里面选择maven-archetyp-site，这种创建出来是一个src目录 + pom文件，（学习springcloud创建的方式），建议用这种方式创建解决方案

然后在资源管理器里面找到src目录，全部都删掉，把pom.xml文件里面没用的东西删掉，增加pom类型，和包+版本号的统一管理

 1   <!-- 手工添加包类型 -->
 2 <packaging>pom</packaging>
 3 
 4 ...
 5 删掉其他没用的
 6 ...
 7 
 8   <!-- 统一管理jar包版本 -->
 9   <properties>
10     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
11     <maven.compiler.source>1.8</maven.compiler.source>
12     <maven.compiler.target>1.8</maven.compiler.target>
13     <junit.version>4.12</junit.version>
14     <log4j.version>1.2.17</log4j.version>
15     <lombok.version>1.16.18</lombok.version>
16     <mysql.version>5.1.47</mysql.version>
17     <druid.version>1.1.16</druid.version>
18     <mybatis.spring.boot.version>1.3.2</mybatis.spring.boot.version>
19   </properties>
20 
21   <!-- 子模块继承之后，提供作用：锁定版本+子modlue不用写groupId和version  -->
22   <dependencyManagement>
23     <dependencies>
24       <!--spring boot 2.2.2-->
25       <dependency>
26         <groupId>org.springframework.boot</groupId>
27         <artifactId>spring-boot-dependencies</artifactId>
28         <version>2.2.2.RELEASE</version>
29         <type>pom</type>
30         <scope>import</scope>
31       </dependency>
32       <!--spring cloud Hoxton.SR1-->
33       <dependency>
34         <groupId>org.springframework.cloud</groupId>
35         <artifactId>spring-cloud-dependencies</artifactId>
36         <version>Hoxton.SR1</version>
37         <type>pom</type>
38         <scope>import</scope>
39       </dependency>
40       <!--spring cloud alibaba 2.1.0.RELEASE-->
41       <dependency>
42         <groupId>com.alibaba.cloud</groupId>
43         <artifactId>spring-cloud-alibaba-dependencies</artifactId>
44         <version>2.1.0.RELEASE</version>
45         <type>pom</type>
46         <scope>import</scope>
47       </dependency>
48       <dependency>
49         <groupId>mysql</groupId>
50         <artifactId>mysql-connector-java</artifactId>
51         <version>${mysql.version}</version>
52       </dependency>
53       <dependency>
54         <groupId>com.alibaba</groupId>
55         <artifactId>druid-spring-boot-starter</artifactId>
56         <version>${druid.version}</version>
57       </dependency>
58       <dependency>
59         <groupId>org.mybatis.spring.boot</groupId>
60         <artifactId>mybatis-spring-boot-starter</artifactId>
61         <version>${mybatis.spring.boot.version}</version>
62       </dependency>
63       <dependency>
64         <groupId>junit</groupId>
65         <artifactId>junit</artifactId>
66         <version>${junit.version}</version>
67       </dependency>
68       <dependency>
69         <groupId>log4j</groupId>
70         <artifactId>log4j</artifactId>
71         <version>${log4j.version}</version>
72       </dependency>
73       <dependency>
74         <groupId>org.projectlombok</groupId>
75         <artifactId>lombok</artifactId>
76         <version>${lombok.version}</version>
77         <optional>true</optional>
78       </dependency>
79     </dependencies>
80   </dependencyManagement>
81 
82   <build>
83     <plugins>
84       <plugin>
85         <groupId>org.springframework.boot</groupId>
86         <artifactId>spring-boot-maven-plugin</artifactId>
87         <configuration>
88           <fork>true</fork>
89           <addResources>true</addResources>
90         </configuration>
91       </plugin>
92     </plugins>
93   </build>

pom.xml

另外一种是：新建空项目（等同于NET解决方案sln），这种创建出来只有空目录没有pom.xml文件

设置当前空项目（解决方案）的Project SDK版本和Project language level

需要手工创建pom.xml文件集中设置包+版本号的统一管理

 1 <!--手动添加下面的包类型 -->
 2 <packaging>pom</packaging>
 3 
 4 
 5 <!-- 统一管理jar包版本 -->
 6   <properties>
 7     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 8     <maven.compiler.source>1.8</maven.compiler.source>
 9     <maven.compiler.target>1.8</maven.compiler.target>
10     <junit.version>4.12</junit.version>
11     <log4j.version>1.2.17</log4j.version>
12     <lombok.version>1.16.18</lombok.version>
13     <mysql.version>5.1.47</mysql.version>
14     <druid.version>1.1.16</druid.version>
15     <mybatis.spring.boot.version>1.3.2</mybatis.spring.boot.version>
16   </properties>
17 
18   <!-- 子模块继承之后，提供作用：锁定版本+子modlue不用写groupId和version  -->
19   <dependencyManagement>
20     <dependencies>
21       <!--spring boot 2.2.2-->
22       <dependency>
23         <groupId>org.springframework.boot</groupId>
24         <artifactId>spring-boot-dependencies</artifactId>
25         <version>2.2.2.RELEASE</version>
26         <type>pom</type>
27         <scope>import</scope>
28       </dependency>
29       <!--spring cloud Hoxton.SR1-->
30       <dependency>
31         <groupId>org.springframework.cloud</groupId>
32         <artifactId>spring-cloud-dependencies</artifactId>
33         <version>Hoxton.SR1</version>
34         <type>pom</type>
35         <scope>import</scope>
36       </dependency>
37       <!--spring cloud alibaba 2.1.0.RELEASE-->
38       <dependency>
39         <groupId>com.alibaba.cloud</groupId>
40         <artifactId>spring-cloud-alibaba-dependencies</artifactId>
41         <version>2.1.0.RELEASE</version>
42         <type>pom</type>
43         <scope>import</scope>
44       </dependency>
45       <dependency>
46         <groupId>mysql</groupId>
47         <artifactId>mysql-connector-java</artifactId>
48         <version>${mysql.version}</version>
49       </dependency>
50       <dependency>
51         <groupId>com.alibaba</groupId>
52         <artifactId>druid-spring-boot-starter</artifactId>
53         <version>${druid.version}</version>
54       </dependency>
55       <dependency>
56         <groupId>org.mybatis.spring.boot</groupId>
57         <artifactId>mybatis-spring-boot-starter</artifactId>
58         <version>${mybatis.spring.boot.version}</version>
59       </dependency>
60       <dependency>
61         <groupId>junit</groupId>
62         <artifactId>junit</artifactId>
63         <version>${junit.version}</version>
64       </dependency>
65       <dependency>
66         <groupId>log4j</groupId>
67         <artifactId>log4j</artifactId>
68         <version>${log4j.version}</version>
69       </dependency>
70       <dependency>
71         <groupId>org.projectlombok</groupId>
72         <artifactId>lombok</artifactId>
73         <version>${lombok.version}</version>
74         <optional>true</optional>
75       </dependency>
76     </dependencies>
77   </dependencyManagement>
78 
79   <build>
80     <plugins>
81       <plugin>
82         <groupId>org.springframework.boot</groupId>
83         <artifactId>spring-boot-maven-plugin</artifactId>
84         <configuration>
85           <fork>true</fork>
86           <addResources>true</addResources>
87         </configuration>
88       </plugin>
89     </plugins>
90   </build>