阅读官方文档，官方文档中对于springboot的简单项目搭建的基本解释。

SpringBoot中spring-parent的作用

Spring Boot provides a number of “Starters” that let you add jars to your classpath. Our applications for smoke tests use the spring-boot-starter-parent in the parent section of the POM. The spring-boot-starter-parent is a special starter that provides useful Maven defaults. It also provides a dependency-management section so that you can omit version tags for “blessed” dependencies.

  • 根据文档的翻译可以简单概括为spring-boot-starter-parent不提供依赖关系。它主要提供maven的一些默认值，一个依赖管理器用于你添加依赖的时候不需要在maven中加version。原文链接
  • 注意：其中不提供依赖的意思是，它不提供如start-web这一类的web启动依赖。即spring-boot-starter-parent不是启动程序，它只是提供了管理工具与预设置值

SpringBoot的Plugin

1
2
3
4
<plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>

Plugin有7个features:

  • Java 1.8 as the default compiler level.

  • UTF-8 source encoding.

  • A dependency management section, inherited from the spring-boot-dependencies POM, that manages the versions of common dependencies. This dependency management lets you omit `` tags for those dependencies when used in your own POM.

  • An execution of the repackage goal with a repackage execution id.

  • Sensible resource filtering.

  • Sensible plugin configuration (Git commit ID, and shade).

  • Sensible resource filtering for application.properties and application.yml including profile-specific files (for example, application-dev.properties and application-dev.yml)

    Since the application.properties and application.yml files accept Spring style placeholders (${…}), the Maven filtering is changed to use @..@ placeholders. (You can override that by setting a Maven property called resource.delimiter.)

SpringBoot的Plugin有以下7个作用,其中原文如上，下方是个人理解

  • java8作为默认的编译器

  • UTF-8作为打包时候的编码方式

  • 从spring启动依赖项POM继承的依赖项管理部分，用于管理公共依赖项的版本。这种依赖项管理允许您在自己的POM中使用这些依赖项时省略标记。

  • 不懂啥意思，直译好像是重新打包的时候会伴随一个重新打包的id

  • SpringBoot中打包时候传递参数给application.yml配置文件，对其进行资源过滤

  • SpringBoot中打包时候修改配置git commit id和shade

  • SpringBoot中打包时根据需求过滤不同形式的文件类型，如 application.properties and application.yml

    简单来说就是从maven中的pom.xml传递参数到application.properties时，需要使用@..@引用变量。如果想修改的话，在pom.xml中的properties中通过<resource.delimiter>@<resource.delimiter>进行修改

SpringBoot在POM中配置示例

SpringBoot作为父项目

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
<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.example</groupId>
    <artifactId>myproject</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    
    <!--设置项目的默认参数与定义环境变量-->
    <properties>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
  </properties>
    
    <!--继承springboot作为当前项目的父项目-->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.5.RELEASE</version>
    </parent>
    
     <!--具体的依赖关系-->
    <dependencies>
    </dependencies>
    
    <!--引入springboot的管理插件-->
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

SpringBoot不作为父项目

由于在公司开发的时候可能需要继承公司的父项目，因而无法继承SpringBoot作为父项目。可采用以下形式

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47

<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.example</groupId>
    <artifactId>myproject</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    
    <!--设置项目的默认参数与定义环境变量-->
    <properties>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
      </properties>
    
    <!--引入springboot，dependencyManagement只是声明依赖，不引入-->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <!-- Import dependency management from Spring Boot -->
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>2.3.5.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    
    <!--具体的依赖关系-->
    <dependencies>
    </dependencies>
    
    
    <!--引入springboot的管理插件-->
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
 </project>