mvn package編譯時突然報錯，我沒有開啟mysql，開啟mysql就可以編譯成功，因為線上編譯環(huán)境沒有mysql需要這樣

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_144]
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_144]
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_144]
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_144]
        at com.mysql.jdbc.Util.handleNewInstance(Util.java:411) ~[mysql-connector-java-5.1.21.jar:na]
        at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1117) ~[mysql-connector-java-5.1.21.jar:na]
        at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:350) ~[mysql-connector-java-5.1.21.jar:na]
        at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2393) ~[mysql-connector-java-5.1.21.jar:na]
        at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2430) ~[mysql-connector-java-5.1.21.jar:na]

查找問題時找到這樣一份代碼，一樣的問題，沒有mysql就不行
https://gitee.com/didispace/S...

pom.xml dependencies如下

<dependencies>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.1.1</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.21</version>
        </dependency>

    </dependencies>