Idea creates a Maven dependent project

1. idea to create a maven project

• 1-1: delete src, targetdirectory, keep onlypom.xml

• 1-2: The root directory pom.xmlcan be inherited by submodules, so the project is just a demo, without considering too many performance issues, so many dependencies

  都写在根级`pom.xml`，子模块只需继承就可以使用。

• 1-3: Root-level pom.xmlfiles are in appendix 1

• 1-4: Dependent modules mybatis spring-boot related modules

2. Create a submodule (module)

• 2-1:  file > new > module Input model

• 2-2:  file > new > module Input dao

• 2-3:  file > new > module Input service

• 2-4:  file > new > module Input webapi

3. Modify the submodule pom.xml configuration

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>parent</artifactId>
        <groupId>com.luyh.projectv1</groupId>
        <version>1.0-SNAPSHOT</version>
        <relativePath>../pom.xml</relativePath>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>projectv1-model</artifactId>
</project>

Note: <font color="red"> <relativePath>../pom.xml</relativePath></font> This section must be added to inherit the parent module

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At this point, the basic structure of the project is completed, and then you can come to the code, oh wait, let me introduce the job responsibilities of each sub-module first.

4. The 'job responsibilities' of submodules in the project

• model This module stores all entity classes

• dao This module stores the specific implementation of data interaction for service calls

• service This module stores the business code implementation for the API layer to call

• webapi This module can also not appear in the project. In order to write demo, the webapi layer is put in

5. modelLayer entity class writing

• build package name com.luyh.projectv1.model

• Please clone my git for the specific code of the entity class  Member.java , the git address is at the bottom

6. daoLayer database operation layer

• Create com.luyh.projectv1.dao.config, there are only 2 configuration java classes in this package that allow spring boot to automatically load the configuration

• Create MemberMapper.java See the code for specific content

• Create MemberMapper.xml under resources/mybatis

• Build IMember.java

• Create Member.java to implement the Imember interface

• Create a resources/application.properties file for configuring database connections

7. service 编写业务逻辑

• 建立 com.luyh.projectv1.service 包

• 建立IMemberService.java接口

• 建立MemberService.java实现类

• MemberService.java 类中自动注入DaoMember 并调用其方法获取数据

8. webapi 编写webapi获取json数据

• 建立Application.java 启动应用

• 建立 com.luyh.projectv1.webapi.controller.MemberController.java 写个rest风格Controller

• 启动

附录1

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.luyh.projectv1</groupId>
    <artifactId>parent</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>pom</packaging>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.3.3.RELEASE</version>
    </parent>
    <modules>

        <module>model</module>
        <module>dao</module>
        <module>service</module>
        <module>webapi</module>
    </modules>

    <!--申明依赖关系-->
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>

        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.2.2</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.2.8</version>
        </dependency>

        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-jdbc</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
    </dependencies>

    <!--设置maven仓库-->

    <repositories>
        <repository>
            <id>spring-releases</id>
            <url>https://repo.spring.io/libs-release</url>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>spring-releases</id>
            <url>https://repo.spring.io/libs-release</url>
        </pluginRepository>
    </pluginRepositories>


</project>

转载自：https://segmentfault.com/a/1190000005020589