Spring Boot创建DataSource时遇到的错误：No supported DataSource type found

在对Spring Boot进行DataSource配置的时候遇到一个错误

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [javax.sql.DataSource]: Factory method 'testDataSource' threw exception; nested exception is java.lang.IllegalStateException: No supported DataSource type found    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:582) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]    ... 93 common frames omittedCaused by: java.lang.IllegalStateException: No supported DataSource type found    at org.springframework.boot.jdbc.DataSourceBuilder.getType(DataSourceBuilder.java:146) ~[spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]    at org.springframework.boot.jdbc.DataSourceBuilder.build(DataSourceBuilder.java:74) ~[spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]    at com.kai.demo.DataSourceConfig.testDataSource(DataSourceConfig.java:37) ~[classes/:na]    at com.kai.demo.DataSourceConfig$$EnhancerBySprinGCGLIB$$e66334f9.CGLIB$testDataSource$3(<generated>) ~[classes/:na]    at com.kai.demo.DataSourceConfig$$EnhancerBySpringCGLIB$$e66334f9$$FastClassBySpringCGLIB$$99581351.invoke(<generated>) ~[classes/:na]    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) ~[spring-core-5.0.8.RELEASE.jar:5.0.8.RELEASE]    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:361) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]    at com.kai.demo.DataSourceConfig$$EnhancerBySpringCGLIB$$e66334f9.testDataSource(<generated>) ~[classes/:na]    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_121]    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_121]    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_121]    at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_121]    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]    ... 94 common frames omitted

原因是在使用DataSourceBuilder时需要在classpath里指定以下三个中的任意一个：

      COMMONS-DBCP

      Tomcat-JDBC

      HIKARICP

于是在pom.xml添加了HiKariCP的依赖

<dependency><groupId>com.zaxxer</groupId><artifactId>HikariCP</artifactId><version>3.2.0</version></dependency>

错误就没有了

参考地址：https://stackoverflow.com/questions/44635962/error-when-create-datasource