Springboot啟動(dòng)項(xiàng)目

Springboot新手，第一次搭建環(huán)境，啟動(dòng)項(xiàng)目，報(bào)錯(cuò)如下。

看起來(lái)是某一個(gè)Class沒有找到。

百度的答案只有一條，在啟動(dòng)類上添加@EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class})事實(shí)證明無(wú)果。

后期懷疑是不是mysql驅(qū)動(dòng)的版本問題，https://mvnrepository.com/ 上搜索替換了N個(gè)版本，報(bào)錯(cuò)相同。

走投無(wú)路之際懷疑是不是配置文件寫錯(cuò)了，盯著看了幾分鐘，
driver-class-name: com.mysql.jdbc.driver怎么看怎么奇怪。

試著改成
driver-class-name: com.mysql.jdbc.Driver運(yùn)行，成功！

如果遇到類似問題，在添加注解信息之外，可以考慮是不是配置文件寫錯(cuò)等問題。畢竟這種問題很難百度，網(wǎng)上搜索到的類似報(bào)錯(cuò)也不會(huì)提供正確的寫法。遂記錄。

正確版本如下

spring:
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    druid:
      driver-class-name: com.mysql.jdbc.Driver
      url: jdbc:mysql://localhost:3306/emos?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
      username: root
      password: root
      initial-size: 2
      max-active: 4
      min-idle: 2
      max-wait: 60000
      test-while-idle: true
      test-on-borrow: false
      test-on-return: false

報(bào)錯(cuò)信息

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [com/alibaba/druid/spring/boot/autoconfigure/DruidDataSourceAutoConfigure.class]: Invocation of init method failed; nested exception is java.sql.SQLException: com.mysql.jdbc.driver
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1786) ~[spring-beans-5.3.9.jar:5.3.9]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:602) ~[spring-beans-5.3.9.jar:5.3.9]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524) ~[spring-beans-5.3.9.jar:5.3.9]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.9.jar:5.3.9]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.9.jar:5.3.9]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.9.jar:5.3.9]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.9.jar:5.3.9]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:944) ~[spring-beans-5.3.9.jar:5.3.9]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918) ~[spring-context-5.3.9.jar:5.3.9]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.9.jar:5.3.9]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.5.4.jar:2.5.4]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754) [spring-boot-2.5.4.jar:2.5.4]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:434) [spring-boot-2.5.4.jar:2.5.4]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:338) [spring-boot-2.5.4.jar:2.5.4]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1343) [spring-boot-2.5.4.jar:2.5.4]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1332) [spring-boot-2.5.4.jar:2.5.4]
    at com.example.emos.EmosApplication.main(EmosApplication.java:13) [classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_281]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_281]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_281]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_281]
    at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.5.4.jar:2.5.4]
Caused by: java.sql.SQLException: com.mysql.jdbc.driver
    at com.alibaba.druid.util.JdbcUtils.createDriver(JdbcUtils.java:604) ~[druid-1.1.13.jar:1.1.13]
    at com.alibaba.druid.pool.DruidDataSource.init(DruidDataSource.java:854) ~[druid-1.1.13.jar:1.1.13]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_281]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_281]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_281]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_281]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeCustomInitMethod(AbstractAutowireCapableBeanFactory.java:1912) ~[spring-beans-5.3.9.jar:5.3.9]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1854) ~[spring-beans-5.3.9.jar:5.3.9]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1782) ~[spring-beans-5.3.9.jar:5.3.9]
    ... 21 common frames omitted
Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.driver
    at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[na:1.8.0_281]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:418) ~[na:1.8.0_281]
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355) ~[na:1.8.0_281]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[na:1.8.0_281]
    at java.lang.Class.forName0(Native Method) ~[na:1.8.0_281]
    at java.lang.Class.forName(Class.java:264) ~[na:1.8.0_281]
    at com.alibaba.druid.util.JdbcUtils.createDriver(JdbcUtils.java:602) ~[druid-1.1.13.jar:1.1.13]
    ... 29 common frames omitted

以上就是Springboot初始化啟動(dòng)報(bào)錯(cuò)Error creating bean with name 'dataSource' defined in class path resource的詳細(xì)內(nèi)容，更多關(guān)于Springboot初始化啟動(dòng)報(bào)錯(cuò)的資料請(qǐng)關(guān)注腳本之家其它相關(guān)文章！