解决：Error creating bean with name ‘dataSource‘ defined in class path resource [spring/spring-datasour

超、凢脫俗 2023-09-27 09:58 4阅读 0赞

### 1、错误日志如下： ###

> **org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource \[spring/spring-datasource-mysql.xml\]: Invocation of init method failed; nested exception is java.lang.NullPointerException**  
> at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1794) ~\[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE\]  
> at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594) ~\[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE\]  
> at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:516) ~\[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE\]  
> at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:324) ~\[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE\]  
> at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~\[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE\]  
> at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~\[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE\]  
> at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~\[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE\]  
> at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:897) ~\[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE\]  
> at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:879) ~\[spring-context-5.2.12.RELEASE.jar:5.2.12.RELEASE\]  
> at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:551) ~\[spring-context-5.2.12.RELEASE.jar:5.2.12.RELEASE\]  
> at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143) ~\[spring-boot-2.3.7.RELEASE.jar:2.3.7.RELEASE\]  
> at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:758) \[spring-boot-2.3.7.RELEASE.jar:2.3.7.RELEASE\]  
> at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750) \[spring-boot-2.3.7.RELEASE.jar:2.3.7.RELEASE\]  
> at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:405) \[spring-boot-2.3.7.RELEASE.jar:2.3.7.RELEASE\]  
> at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) \[spring-boot-2.3.7.RELEASE.jar:2.3.7.RELEASE\]  
> at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237) \[spring-boot-2.3.7.RELEASE.jar:2.3.7.RELEASE\]  
> at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) \[spring-boot-2.3.7.RELEASE.jar:2.3.7.RELEASE\]  
> at com.shuizhu.ScaffoldingShuizhuApplication.main(ScaffoldingShuizhuApplication.java:14) \[classes/:na\]  
> Caused by: java.lang.NullPointerException: null  
> at java.util.Hashtable.put(Hashtable.java:459) ~\[na:1.8.0\_131\]  
> ........

### 2、原因及解决方法： ###

造成这个错误有如下2个原因：

1.  账号密码等的property的name或value错误了
2.  mybatis版本与Druid版本冲突

#### <1> 原因1的位置如下，请认真检查（我这里使用了外部配置文件进行配置了，直接使用yaml和properties文件也会出现该错误） ####

![f427f047c974484d990e57e06730de18.png][]

#### <2> 原因2：版本冲突 ####

**我的就是这个原因，版本冲突导致无法生成DataSource**

使用的版本如下：

![9b5d3a5d0646426eb8551ed7d76efb44.png][]

这两个版本是冲突的，去网上查询了一下版本，最后面修改成一下版本：

>  **<dependency>  
> <groupId>com.baomidou</groupId>  
> <artifactId>mybatis-plus-boot-starter</artifactId>  
> <version>3.3.0</version>  
> </dependency>  
>   
> <dependency>  
> <groupId>com.alibaba</groupId>  
> <artifactId>druid</artifactId>  
> <version>1.1.21</version>  
> </dependency>**

修改完pom文件，一定要记得刷新maven哈，最后再重启项目，该错误解决

![fd32a7da9583463eaf3d6b09b7ddd885.png][]

[f427f047c974484d990e57e06730de18.png]: https://img-blog.csdnimg.cn/f427f047c974484d990e57e06730de18.png
[9b5d3a5d0646426eb8551ed7d76efb44.png]: https://img-blog.csdnimg.cn/9b5d3a5d0646426eb8551ed7d76efb44.png
[fd32a7da9583463eaf3d6b09b7ddd885.png]: https://img-blog.csdnimg.cn/fd32a7da9583463eaf3d6b09b7ddd885.png

解决：Error creating bean with name ‘dataSource‘ defined in class path resource [spring/spring-datasour

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