数据源配置异常

Posted 2022-01-29 天河一粟

先上异常信息

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2021-08-31 18:53:44.137 ERROR 15044 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

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APPLICATION FAILED TO START
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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).

针对如上异常原因有以下几点

1. 数据源配置不对，需要在application.properties增加如下数据源，注意二选一

   # mysql数据库连接 spring boot 2.0（内置jdbc5驱动）
   #spring.datasource.driver-class-name=com.mysql.jdbc.Driver
   #spring.datasource.url=jdbc:mysql://localhost:3306/testdb?characterEncoding=utf-8&useSSL=false
   #spring.datasource.username=root
   #spring.datasource.password=root
   # mysql数据库连接 spring boot 2.1及以上（内置jdbc8驱动）
   spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
   spring.datasource.url=jdbc:mysql://localhost:3306/testdb?serverTimezone=GMT%2B8
   spring.datasource.username=root
   spring.datasource.password=root
   

2. 在编译后的target目录中配置数据源的application.properties文件位置不对，把资源文件放到classes目录下就好啦

3. 使用--spring.config.location指定的配置文件的位置
   ① 命令方式
   java -jar xxx.jar --spring.config.location=D:\\a\\b\\application.properties,D:\\a\\b\\logback-spring.xml

   ② idea开发工具参数形式