9) 依赖查询 & 镜像站

    <repositories>
        <repository>
            <id>central</id>
            <name>Maven Repository Switchboard</name>
            <layout>default</layout>
            <url>http://repo.maven.apache.org/maven2</url>
        </repository>
        <repository>
            <id>maven-repo1</id>
            <url>http://repo1.maven.org/maven2/</url>
        </repository>
        <repository>
            <id>apache-repo</id>
            <url>https://repository.apache.org/content/groups/public/</url>
        </repository>
        <repository>
            <id>sourceforge-releases</id>
            <url>https://oss.sonatype.org/content/repositories/releases/</url>
        </repository>
        <repository>
            <id>io.spring.repo.maven.release</id>
            <url>http://repo.spring.io/release/</url>
        </repository>
        <repository>
            <id>oschina</id>
            <url>http://maven.oschina.net/content/groups/public/</url>
        </repository>
        <repository>
            <id>ow2-snapshot</id>
            <url>http://repository.ow2.org/nexus/content/repositories/snapshots</url>
        </repository>
        <repository>
            <id>apache.snapshots</id>
            <url>http://repository.apache.org/snapshots</url>
        </repository>
        <repository>
            <id>sonatype-nexus-snapshots</id>
            <url>https://oss.sonatype.org/content/repositories/snapshots</url>
        </repository>
    </repositories>