springboot 启动报错Error starting ApplicationContext(未能配置数据源)

今天药忘吃喽~ 2023-02-24 11:28 1阅读 0赞

错误如下：

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
    2020-07-09 14:30:47.386 ERROR 25792 --- [  restartedMain] o.s.b.d.LoggingFailureAnalysisReporter   : 
    
    ***************************
    APPLICATION FAILED TO START
    ***************************
    
    Description:
    
    Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be 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).

**主要错误**：Failed to configure a DataSource: ‘url’ attribute is not specified and no embedded datasource could be configured.

未能配置数据源:未指定“url”属性，也无法配置嵌入式数据源。

**原因**：

spring boot默认会加载org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration类，DataSourceAutoConfiguration类使用了@Configuration注解向spring注入了dataSource bean。因为工程中没有关于dataSource相关的配置信息，当spring创建dataSource bean因缺少相关的信息就会报错。

**两种解决办法**

1.在Application类上加（未尝试）

@EnableAutoConfiguration(exclude=\{DataSourceAutoConfiguration.class\})

2.配置数据源：（亲测有效）

例如在application配置文件中：

spring.datasource.driver-class-name=com.mysql.jdbc.Driver  
spring.datasource.url=jdbc:mysql://ip:端口号/数据库名称?useSSL=false&useUnicode=true&characterEncoding=utf8&serverTimezone=GMT%2B8