无法自动配置DataSource：未指定“spring.datasource.url” [英] Failed to auto-configure a DataSource: 'spring.datasource.url' is not specified

问题描述

我已经使用Web，MongoDB和JPA依赖项从 SPRING INITIALIZR 创建了一个基本的Spring启动应用程序。

I have created a basic spring boot application from SPRING INITIALIZR with the Web, MongoDB and JPA dependencies.

当我尝试运行spring boot应用程序时，我遇到以下异常：

When I try to run the spring boot application I am getting the following exception:

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：

In application.properties file I am having the following configuration:

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 Boot：2.0

Versions which I use: Spring : 5.0.4, MongoDB : 3.6, Spring Boot: 2.0

推荐答案

由于您在pom.xml文件中添加了mongodb和data-jpa依赖项，因此它创建了依赖性冲突，如下所示

Since you have added both mongodb and data-jpa dependencies in your pom.xml file, it was creating a dependency conflict like below

<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依赖项并运行。它应该可以正常工作。

Try removing jpa dependency and run. It should work fine.

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