问春季引导POM.xml缺少依赖项

EN

 <?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>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.19.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <groupId>com.example</groupId>
    <artifactId>AOP_demo-3</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>AOP_demo-3</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <repositories>
    <repository>
        <id>central-repo</id>
        <name>Central Repository</name>
        <url>http://repo1.maven.org/maven2</url>
    </repository>
</repositories>

    <dependencies>
    <dependency>   
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
    <version>1.5.7.RELEASE</version>
    </dependency>
        <dependency> <!-- error is here -->
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
            <type>pom</type>
            <scope>runtime</scope>
        </dependency>

        <dependency>  <!-- error is here -->
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <type>pom</type>
            <scope>runtime</scope>
        </dependency>
    </dependencies> 

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

</project>