啟動(dòng)springboot應(yīng)用因未配置數(shù)據(jù)庫報(bào)錯(cuò)

描述

創(chuàng)建一個(gè)全新的springboot項(xiàng)目，第一次啟動(dòng)時(shí)報(bào)錯(cuò)，具體錯(cuò)誤信息如下所示：

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2021-06-14 17:58:10.322 ERROR 12292 --- [ 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

解決方案

方案一

在application.properties配置文件中添加數(shù)據(jù)庫配置信息

spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/guli?serverTimezone=GMT%2B8
spring.datasource.username=cx
spring.datasource.password=123456

方案二

在啟動(dòng)類頭部聲明進(jìn)行聲明：

@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)

springboot 1.5.8.RELEASE 版本啟動(dòng)報(bào)錯(cuò)

起因

新建spring boot項(xiàng)目選擇1.5.8.RELEASE版本后生成項(xiàng)目，配置好application.properties后啟動(dòng)項(xiàng)目，報(bào)錯(cuò)。

Caused by: java.lang.ClassNotFoundException: org.springframework.core.env.EnvironmentCapable
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)

錯(cuò)誤排查

1.ctrl+shift+t查找后，發(fā)現(xiàn)沒這個(gè)類。

2.從這個(gè)類的全名不能發(fā)現(xiàn)，這個(gè)類是屬于spring-core.jar下的。

3.在maven dependencies中查看spring-core的版本是4.3.12.RELEASE

4.網(wǎng)上查詢可知spring-core4.3.12.RELEASE中沒有這個(gè)類。

解決方法

找到有這個(gè)類的spring-core版本。我用的是 4.3.9.RELEASE。然后在dependencies中加入

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>4.3.9.RELEASE</version>
</dependency>

再次啟動(dòng)就可以了。

以上為個(gè)人經(jīng)驗(yàn)，希望能給大家一個(gè)參考，也希望大家多多支持腳本之家。

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