Spring启动项目在开始时给出了org.springframework.jdbc.datasource.ConnectionHandle

Question

虽然我可以看到Maven资源库中存在org.springframework.jdbc.datasource.ConnectionHandle，但是当我运行App.java时出现此错误：

Caused by: java.lang.ClassNotFoundException: org.springframework.jdbc.datasource.ConnectionHandle
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_111]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_111]
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_111]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_111]
    ... 60 common frames omitted

这些是我pom.xml中的依赖项：

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.2.RELEASE</version>
</parent>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <scope>test</scope>
    </dependency>
    <!-- hibernate-validator was added to stop an error when starting the server -->
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-validator</artifactId>
        <version>5.3.0.Final</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
    </dependency>
</dependencies>