Spring Boot 应用程序 url 不能为空

Question

你好，当我尝试启动 Spring Boot 应用程序并获取堆栈跟踪时

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.<init>(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]

我在application.properties中添加了url

spring.datasource.url=jdbc:oracle:thin:@localhost:1521:spring

我认为可能是oracle的驱动有问题，maven找不到这个依赖

<dependency>
    <groupId>com.oracle</groupId>
    <artifactId>ojdbc14</artifactId>
    <version>10.2.0.4.0</version>
</dependency>

所以我只是将外部 jar 添加到我的项目中，但我仍然遇到 url 错误的问题

Answer 1

Not loading a JDBC driver as driverClassName property is null.

您可能还想通过向属性文件添加驱动程序类名来解决该问题:

spring.datasource.driver-class-name=oracle.jdbc.OracleDriver

您是否在应用程序中的某个位置配置了 DataSource bean？假设您没有禁用自动配置，您应该能够获得有效的数据源配置。