云服务器中tomcat连接数据库配置

<Context>
    <Resource name="jdbc/MyDB"
              auth="Container"
              type="javax.sql.DataSource"
              driverClassName="com.mysql.jdbc.Driver"
              url="jdbc:mysql://localhost:3306/mydatabase"
              username="myuser"
              password="mypassword"
              maxTotal="20"
              maxIdle="10"
              maxWaitMillis="-1"/>
</Context>

<GlobalNamingResources>
    <Resource name="jdbc/MyDB"
              auth="Container"
              type="javax.sql.DataSource"
              driverClassName="com.mysql.jdbc.Driver"
              url="jdbc:mysql://localhost:3306/mydatabase"
              username="myuser"
              password="mypassword"
              maxTotal="20"
              maxIdle="10"
              maxWaitMillis="-1"/>
</GlobalNamingResources>

<Service name="Catalina">
    <Connector port="8080" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" />
    <Engine name="Catalina" defaultHost="localhost">
        <Realm className="org.apache.catalina.realm.LockOutRealm">
            <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
                   resourceName="UserDatabase"/>
        </Realm>
        <Host name="localhost"  appBase="webapps"
              unpackWARs="true" autoDeploy="true">
            <Context path="/myapp" docBase="myapp" reloadable="true">
                <ResourceLink name="jdbc/MyDB" global="jdbc/MyDB" type="javax.sql.DataSource"/>
            </Context>
        </Host>
    </Engine>
</Service>