带Spring云的多模块Spring项目的父

Question

我已经找了很长时间的答案，但并没有运气，所以我决定张贴它。最近，我尝试用父pom制作一些简单的应用程序，以轻松管理我的依赖项版本。因此，我在我的父母pom中添加了依赖项，添加了第一个简单的依赖项，我得出了：

    <?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>it.orestes</groupId>
    <artifactId>Landlord</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <modules>
        <module>discovery</module>
        <module>property</module>
        <module>gateway</module>
    </modules>
    <packaging>pom</packaging>

    <properties>
        <springboot.version>2.5.2</springboot.version>
        <maven.compiler.source>11</maven.compiler.source>
        <maven.compiler.target>11</maven.compiler.target>
        <java.version>11</java.version>
        <spring-cloud.version>2020.0.3</spring-cloud.version>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${springboot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <pluginManagement>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
            </plugins>
        </pluginManagement>
    </build>
</project>

然后我做了第一个孩子项目：

<?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>
    <parent>
        <groupId>it.orestes</groupId>
        <artifactId>Landlord</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <relativePath/>
    </parent>

    <groupId>it.orestes.landlord</groupId>
    <artifactId>eureka</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>discovery</name>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

我确实试着建造，但最终

'dependencies.dependency.version' for org.springframework.cloud:spring-cloud-starter-netflix-eureka-server:jar is missing. @ line 18, column 21

现在我不明白为什么Spring Boot依赖项被正确地提取出来，但spring cloud不是，如果我将dependencymanagement添加到子项目中，它工作得很好，但这不是我的目标，它开始困扰我为什么它不是从父pom dependencymanagement继承来的？有什么方法可以像我在父pom中计划的那样实现它，或者只是我可以将具有版本的属性传递给子pom？

Answer 1

将spring云版本从父模块移动到子模块（网关）中。毕竟，并非所有的子模块都将成为网关，因此并非所有模块都必须继承spring cloud版本属性。

<?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>
<parent>
    <groupId>it.orestes</groupId>
    <artifactId>Landlord</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <relativePath/>
</parent>

<groupId>it.orestes.landlord</groupId>
<artifactId>eureka</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>discovery</name>

<properties>
    <spring-cloud.version>2020.0.3</spring-cloud.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>