spring boot项目启动 Failed to instantiate [com.zaxxer.hikari.HikariDataSource]
spring boot项目启动bao2021-06-02 23:10:16.048 INFO 4672 --- [main] io.searchbox.client.JestClientFactory: Idle connection reaping disabled...2021-06-02 23:10:16.280 WARN 4672 --- [main] onfigReactiveWebSe
spring boot项目启动
nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.zaxxer.hikari.HikariDataSource]
报错如下:
2021-06-02 23:10:16.048 INFO 4672 --- [ main] io.searchbox.client.JestClientFactory : Idle connection reaping disabled...
2021-06-02 23:10:16.280 WARN 4672 --- [ main] onfigReactiveWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Hikari.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.zaxxer.hikari.HikariDataSource]: Factory method 'dataSource' threw exception; nested exception is org.springframework.boot.autoconfigure.jdbc.DataSourceProperties$DataSourceBeanCreationException: Failed to determine a suitable driver class
2021-06-02 23:10:16.295 INFO 4672 --- [ main] ConditionEvaluationReportLoggingListener :Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2021-06-02 23:10:16.299 ERROR 4672 --- [ 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
报错信息说明的很详细:就是在项目启动的时候在 resource目录下没有加载到配置信息;
解决方法一:
如果项目只是想简单的启动运行,不进行数据库操作可以在 启动类上做如下处理便可解决。
@SpringBootApplication(exclude= {DataSourceAutoConfiguration.class})
解决方法二:
如果对数据库操作有要求的话在application文件中加入配置
spring:
datasource:
url: jdbc:mysql://localhost:3306/数据库名称?useUnicode=true&characterEncoding=UTF-8&useSSL=false
username: 数据库用户名
password: 数据库密码
# 如果在pom 文件中没有依赖数据库连接这个会报红,加入即可。但是在启动后后台打印日志会报红
#《Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is #`com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual #loading of the driver class is generally unnecessary.》
# 把驱动名称:com.mysql.jdbc.Driver 换成 com.mysql.cj.jdbc.Driver 即可
driver-class-name: com.mysql.jdbc.Driver
spring:
datasource:
url: jdbc:mysql://localhost:3306/数据库名称?useUnicode=true&characterEncoding=UTF-8&useSSL=false
username: 数据库用户名
password: 数据库密码
driver-class-name: com.mysql.cj.jdbc.Driver
- yml或者properties文件没有被扫描到,需要在pom文件中<build></build>添加如下.来保证文件都能正常被扫描到并且加载成功.
<!-- 如果不添加此节点mybatis的mapper.xml文件都会被漏掉。 -->
<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>
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