Question

你好，当我尝试启动Spring Boot应用程序时获取一个堆栈跟踪

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

我认为对于oracle的驱动程序可能有问题，maven无法找到这种依赖

<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，但我仍然有错误的URL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此问题：

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

您是在应用程序中的某个位置配置DataSource bean吗？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。

Answer 2

Oracle JDBC驱动程序只是V 11.2.0.4中maven的一部分..过去有一些问题。

点击链接＆＃34; https://blogs.oracle.com/dev2dev/entry/oracle_maven_repository_instructions_for＆＃34;下载并将您想要的驱动程序添加到本地maven仓库。

同时检查Find Oracle JDBC driver in Maven repository

Spring Boot应用程序url不能为null

2 个答案: