title: Spring Boot application The url cannot be null
body: <p>Hello when i trying start Spring Boot app a get a stacktrace</p>
  
  <pre><code>2016-11-18 04:41:35.492  WARN 4256 --- [  restartedMain] o.a.tomcat.jdbc.pool.PooledConnection    : Not loading a JDBC driver as driverClassName property is null.
  2016-11-18 04:41:35.499 ERROR 4256 --- [  restartedMain] o.a.tomcat.jdbc.pool.ConnectionPool      : Unable to create initial connections of pool.
  
  java.sql.SQLException: The url cannot be null
      at java.sql.DriverManager.getConnection(DriverManager.java:649) ~[na:1.8.0_111]
      at java.sql.DriverManager.getConnection(DriverManager.java:208) ~[na:1.8.0_111]
      at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:308) ~[tomcat-jdbc-8.5.4.jar:na]
      at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:203) ~[tomcat-jdbc-8.5.4.jar:na]
      at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:716) [tomcat-jdbc-8.5.4.jar:na]
      at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:648) [tomcat-jdbc-8.5.4.jar:na]
      at org.apache.tomcat.jdbc.pool.ConnectionPool.init(ConnectionPool.java:468) [tomcat-jdbc-8.5.4.jar:na]
      at org.apache.tomcat.jdbc.pool.ConnectionPool.&lt;init&gt;(ConnectionPool.java:143) [tomcat-jdbc-8.5.4.jar:na]
      at org.apache.tomcat.jdbc.pool.DataSourceProxy.pCreatePool(DataSourceProxy.java:118) [tomcat-jdbc-8.5.4.jar:na]
      at org.apache.tomcat.jdbc.pool.DataSourceProxy.createPool(DataSourceProxy.java:107) [tomcat-jdbc-8.5.4.jar:na]
  </code></pre>
  
  <p>I added url in application.properties </p>
  
  <pre><code>spring.datasource.url=jdbc:oracle:thin:@localhost:1521:spring
  </code></pre>
  
  <p>I think it's may be problem with drivers to oracle, maven can't find this dependency</p>
  
  <pre><code>&lt;dependency&gt;
      &lt;groupId&gt;com.oracle&lt;/groupId&gt;
      &lt;artifactId&gt;ojdbc14&lt;/artifactId&gt;
      &lt;version&gt;10.2.0.4.0&lt;/version&gt;
  &lt;/dependency&gt;
  </code></pre>
  
  <p>So I just add external jar to my project, but i still have problem with wrong url</p>