2018-12-02 Maven 找不到jar包，在POM.XML里面加上这些就好了

    <repositories>
        <repository>
            <id>central</id>
            <name>central</name>
            <url>http://central.maven.org/maven2/</url>
        </repository>
        <repository>
            <id>Sonatype Repository</id>
            <name>Sonatype Repository</name>
            <url>https://oss.sonatype.org/content/repositories/releases/</url>
        </repository>
        <repository>
            <id>Spring Lib M Repository</id>
            <name>Spring Lib M Repository</name>
            <url>http://repo.spring.io/libs-milestone/</url>
        </repository>

    </repositories>