使用Spring IO平台时的问题

Question

我已经用Maven创建了一个Spring MVC项目。我是Spring框架的新手。参考下面的教程，我试图分析Spring Data JPA存储库。我已经在pom.xml中启用了Spring IO平台，配置如下:

<dependency>
    <groupId>io.spring.platform</groupId>
    <artifactId>platform-bom</artifactId>
    <version>1.1.2.RELEASE</version>
    <type>pom</type>
    <scope>import</scope>
</dependency>

之后，我添加了其他必需的依赖项，而没有提及版本，如下所示:

<!-- Database (H2) -->
<dependency>
    <groupId>com.h2database</groupId>
    <artifactId>h2</artifactId>
</dependency>
<!-- DataSource (HikariCP) -->
<dependency>
    <groupId>com.zaxxer</groupId>
    <artifactId>HikariCP</artifactId>
</dependency>
<!-- JPA Provider (Hibernate) -->
<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-entitymanager</artifactId>
</dependency>
<!-- Spring Data JPA -->
<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-jpa</artifactId>
</dependency>

教程说Spring IO平台将负责版本。但是当我尝试这样做时，我在pom。xml中得到一个错误，说

项目构建错误:'dependencies.dependency.version' for com。H2database:h2:jar丢失

有什么建议，我如何使用和启用Spring IO?

Answer 1

下面的POM可以工作:

<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>
    <packaging>jar</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <groupId>test</groupId>
    <artifactId>test</artifactId>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.3</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
    <dependencies>
        <!-- Database (H2) -->
        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
        </dependency>
        <!-- DataSource (HikariCP) -->
        <dependency>
            <groupId>com.zaxxer</groupId>
            <artifactId>HikariCP</artifactId>
        </dependency>
        <!-- JPA Provider (Hibernate) -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
        </dependency>
        <!-- Spring Data JPA -->
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-jpa</artifactId>
        </dependency>
    </dependencies>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>io.spring.platform</groupId>
                <artifactId>platform-bom</artifactId>
                <version>1.1.2.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
</project>

重要的部分是将Spring IO依赖放在POM的dependencyManagement部分中。这是因为它的范围是import。