SpringBoot 2.0 启动报错 Failed to auto-configure a DataSource

梦里梦外; 2023-06-29 10:31 26阅读 0赞

## springboot 2.0 启动报错 Failed to auto-configure a DataSource ##

### 原因 ###

在pom中添加了mybatis，mysql依赖后，如果application.properties中没有配置数据库连接方面的配置，则会报错：

这是因为添加了数据库组件，所以autoconfig会去读取数据源配置，而我新建的项目还没有配置数据源，所以会导致异常出现。

***************************
    APPLICATION FAILED TO START
    ***************************
    Description:
    Failed to auto-configure a DataSource: 'spring.datasource.url' is not specified and no embedded datasource could be auto-configured.
    Reason: Failed to determine a suitable driver class
    Action:
    Consider the following:
    If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.
    
    If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).

### 解决方法 ###

#### 1.在启动类中加注解 ####

在启动类的 @EnableAutoConfiguration 或 @SpringBootApplication 中添加
    exclude = {DataSourceAutoConfiguration.class}，排除此类的autoconfig。启动以后就可以正常运行。

#### 2.在配置文件application.properties中添加数据源配置，或在pon.xml去除maven依赖 ####