Using Spring Boot without the parent POM；

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问题

spring boot项目一般情况下的parent如下：

<parent>

    <groupId>org.springframework.boot</groupId>

    <artifactId>spring-boot-starter-parent</artifactId>

    <version>1.4.0.BUILD-SNAPSHOT</version>

</parent>

  但是如果这个项目是其他项目的子项目呢???，意味着pom文件里要多个parent，但是一个孩子多个亲爸的事情怎么允许在代码的世界呢;（pom中只能一个parent）；

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解决

  关于spring-boot，人家官网说了，不一定非要继承spring-boot的parent pom的，人家已经考虑到你可能已经继承了其他parent的情况，并给出了dependency management的方案。

http://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#using-boot-maven-without-a-parent

Not everyone likes inheriting from the spring-boot-starter-parent POM. You may have your own corporate standard parent that you need to use, or you may just prefer to explicitly declare all your Maven configuration.

If you don’t want to use the spring-boot-starter-parent, you can still keep the benefit of the dependency management (but not the plugin management) by using a scope=import dependency:

<dependencyManagement>

     <dependencies>

        <dependency>

            <!-- Import dependency management from Spring Boot -->

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-dependencies</artifactId>

            <version>1.4.0.RELEASE</version>

            <type>pom</type>

            <scope>import</scope>

        </dependency>

    </dependencies>

</dependencyManagement>

That setup does not allow you to override individual dependencies using a property as explained above. To achieve the same result, you’d need to add an entry in the dependencyManagement of your project before the spring-boot-dependencies entry. For instance, to upgrade to another Spring Data release train you’d add the following to your pom.xml.

<dependencyManagement>

    <dependencies>

        <!-- Override Spring Data release train provided by Spring Boot -->

        <dependency>

            <groupId>org.springframework.data</groupId>

            <artifactId>spring-data-releasetrain</artifactId>

            <version>Fowler-SR2</version>

            <scope>import</scope>

            <type>pom</type>

        </dependency>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-dependencies</artifactId>

            <version>1.4.0.RELEASE</version>

            <type>pom</type>

            <scope>import</scope>

        </dependency>

    </dependencies>

</dependencyManagement>

In the example above, we specify a BOM but any dependency type can be overridden that way.

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  完美解决~~~ ，想起上个单位的大神，总喜欢看官网。虽然慢，但是很快。一步一步，是魔鬼的步伐