java - 自动配置数据源失败 : 'spring.datasource.url' is not specified

Question

我从 SPRING INITIALIZR 创建了一个基本的 Spring Boot 应用程序，其中包含 Web、MongoDB 和 JPA 依赖项。

当我尝试运行 spring boot 应用程序时，出现以下异常:

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2018-03-25 16:27:02.807 ERROR 16256 --- [  restartedMain] o.s.b.d.LoggingFailureAnalysisReporter   : 

***************************
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 situation:
If you want an embedded database like H2, HSQL or Derby, please add it in the Classpath.
If you have database settings to be loaded from a particular profile you may need to activate it since no profiles were currently active.

在 application.properties 文件中，我有以下配置:

server.port=8081
spring.data.mongodb.database=TestDatabase
spring.data.mongodb.host=localhost
spring.data.mongodb.port=27017

我使用的版本: Spring :5.0.4， MongoDB:3.6， Spring 启动:2.0

Answer 1

由于您在 pom.xml 文件中添加了 mongodb 和 data-jpa 依赖项，因此会产生如下所示的依赖项冲突

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>

尝试删除 jpa 依赖并运行。它应该可以正常工作。