【已解决】SpringBoot 启动报错：Failed to configure a DataSource: ‘url‘ attribute is not specified and no emb

太过爱你忘了你带给我的痛 2024-02-19 09:08 94阅读 0赞

`下面是解决方法，快速搞定。`

### 场景 ###

初始化创建的 SpringBoot ，什么都没改怎么就报错了？

#### 文章目录 ####

*   *  场景
     *  错误信息
     *  解决方案
     *   *  方案1
         *  方案2
         *  方案三：
     *  原因

### 错误信息 ###

2023-11-06 22:09:42.132  INFO 2364 --- [           main] ConditionEvaluationReportLoggingListener : 
    
    Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
    2023-11-06 22:09:42.144 ERROR 2364 --- [           main] 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).
    
    
    Process finished with exit code 1

![在这里插入图片描述][b4dd50bd1060446097cde0506029604c.png]

### 解决方案 ###

#### 方案1 ####

如果项目不需要数据库相关信息就排除此类的autoconfig  
在 @SpringBootApplication 注解上加上 exclude ，解除自动加载DataSourceAutoConfiguration。

@SpringBootApplication(exclude= {
        DataSourceAutoConfiguration.class})

springboot启动类加上这个启动以后就可以正常运行。完整代码：

@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)
    public class Application {
        
    	public static void main(String[] args) {
        
    		SpringApplication.run(Application, args);
    	}
    }

![在这里插入图片描述][d5a3bb7081e34be2b6e7bfc176e724de.png]

#### 方案2 ####

配置文件添加数据库链接信息

`.properties` 文件添加数据库配置信息（以mysql为例）：

spring.datasource.name=test
    spring.datasource.url=jdbc:mysql://localhost:3306/test 
    spring.datasource.username=root
    spring.datasource.password=123456
    spring.datasource.driver-class-name=com.mysql.jdbc.Driver

.yml 文件添加数据库配置信息（已mysql为例）：

spring:
      datasource:
        name: test
        url: jdbc:mysql://localhost:3306/test
        username: root
        password: 123456
        driver-class-name: com.mysql.jdbc.Driver

#### 方案三： ####

配置pom.xml中yml或者properties扫描

需要在 pom 文件中 中添加如下来保证文件都能正常被扫描到并且加载成功。

<resources>
        <resource>
            <directory>src/main/java</directory>
            <includes>
                <include>**/*.yml</include>
                <include>**/*.properties</include>
                <include>**/*.xml</include>
            </includes>
            <filtering>false</filtering>
        </resource>
        <resource>
            <directory>src/main/resources</directory>
            <includes>
                <include>**/*.yml</include>
                <include>**/*.properties</include>
                <include>**/*.xml</include>
            </includes>
            <filtering>false</filtering>
        </resource>
    </resources>

### 原因 ###

根据报错日志分析是在 SpringBoot 项目启动的时候没有找到 database 数据库连接地址，我们知道在 SpringBoot 启动的时候会默认加载org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration 这个类，而 DataSourceAutoConfiguration 类使用了 @Configuration 注解向spring注入了dataSource bean，又因为项目中并没有关于 dataSource 相关的配置信息，所以当spring创建dataSource bean时因缺少相关的信息就会报错。

[b4dd50bd1060446097cde0506029604c.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/19/fd2b913d26d2468f9d0c910ed68fe1b7.png
[d5a3bb7081e34be2b6e7bfc176e724de.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/19/ef58634f3a2b4badab888687081fb7fb.png

【已解决】SpringBoot 启动报错：Failed to configure a DataSource: ‘url‘ attribute is not specified and no emb

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