在boot启动的时候出现Failed to configure a DataSource

本文链接：https://blog.youkuaiyun.com/BinXNoob/article/details/106351907

本文介绍了当Spring Boot启动时遇到'Failed to configure a DataSource: 'url' attribute is not specified...'错误的原因及解决方案。错误源于未指定DataSource的URL且未配置内嵌数据源。解决方法包括移除未使用的mybatis-spring-boot-starter依赖或禁用Spring Boot自动初始化DataSource的相关代码。

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在boot启动的时候出现Failed to configure a DataSource: ‘url’ attribute is not specified and no embedded datasource could be configured.

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).


Process finished with exit code 0

如果出现这个错误，我们需要在pom文件中找到这个依赖，注释掉即可

  <!--<dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
        </dependency>-->

原因

应用没有使用到DataSource，但是在pom.xml里引入了mybatis-spring-boot-starter

问题解决办法
有两种：
把mybatis-spring-boot-starter的依赖去掉，这样就不会触发spring boot相关的代码
把spring boot自动初始化DataSource相关的代码禁止掉

禁止的办法有两种：

在启动类的@SpringBootApplication加上

    @SpringBootApplication(exclude = { DataSourceAutoConfiguration.class, DataSourceTransactionManagerAutoConfiguration.class })

在application.properties里配置：

    spring.autoconfigure.exclude=org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration,org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration