Spring Boot 2.0迁移之后：driverClassName需要jdbcUrl
已解决：我的解决方案：我从DatabaseConfig.java中删除了dataSource（）方法。 然后，应用程序成功启动:)
我刚刚将Spring Boot项目从1.5.x更新到2.0.0 。 在更新之前，此应用程序正常工作，但在更新后，我收到的一些错误如下。 有什么问题，你能帮帮我吗？
我在项目中使用PostgreSQL，Hibernate，JPA。
我也试过这个，但它对我不起作用。
谢谢你的时间 ：）
这是问题：
2018-03-03 23:19:37.934 ERROR 42323 --- [ main] com.zaxxer.hikari.HikariConfig : HikariPool-1 - dataSource or dataSourceClassName or jdbcUrl is required. 2018-03-03 23:19:37.938 WARN 42323 --- [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Unsatisfied dependency expressed through method 'entityManagerFactory' parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'entityManagerFactoryBuilder' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Unsatisfied dependency expressed through method 'entityManagerFactoryBuilder' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jpaVendorAdapter' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.jpa.JpaVendorAdapter]: Factory method 'jpaVendorAdapter' threw exception; nested exception is java.lang.IllegalArgumentException: dataSource or dataSourceClassName or jdbcUrl is required. 2018-03-03 23:19:37.939 INFO 42323 --- [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat] 2018-03-03 23:19:37.954 INFO 42323 --- [ main] ConditionEvaluationReportLoggingListener : Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 2018-03-03 23:19:37.963 ERROR 42323 --- [ main] osboot.SpringApplication : Application run failed org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Unsatisfied dependency expressed through method 'entityManagerFactory' parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'entityManagerFactoryBuilder' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Unsatisfied dependency expressed through method 'entityManagerFactoryBuilder' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jpaVendorAdapter' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.jpa.JpaVendorAdapter]: Factory method 'jpaVendorAdapter' threw exception; nested exception is java.lang.IllegalArgumentException: dataSource or dataSourceClassName or jdbcUrl is required. at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:729) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:470) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1250) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1099) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:502) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:312) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1085) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:858) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.0.0.RELEASE.jar:2.0.0.RELEASE] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:752) [spring-boot-2.0.0.RELEASE.jar:2.0.0.RELEASE] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:388) [spring-boot-2.0.0.RELEASE.jar:2.0.0.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) [spring-boot-2.0.0.RELEASE.jar:2.0.0.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1246) [spring-boot-2.0.0.RELEASE.jar:2.0.0.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1234) [spring-boot-2.0.0.RELEASE.jar:2.0.0.RELEASE] at com.Test.Test.TestApplication.main(TestApplication.java:17) [classes/:na] Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'entityManagerFactoryBuilder' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Unsatisfied dependency expressed through method 'entityManagerFactoryBuilder' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jpaVendorAdapter' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.jpa.JpaVendorAdapter]: Factory method 'jpaVendorAdapter' threw exception; nested exception is java.lang.IllegalArgumentException: dataSource or dataSourceClassName or jdbcUrl is required. at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:729) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:470) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1250) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1099) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:502) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:312) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:251) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1138) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1065) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:815) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:721) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] ... 19 common frames omitted Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jpaVendorAdapter' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.jpa.JpaVendorAdapter]: Factory method 'jpaVendorAdapter' threw exception; nested exception is java.lang.IllegalArgumentException: dataSource or dataSourceClassName or jdbcUrl is required. at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:587) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1250) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1099) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:502) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:312) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:251) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1138) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1065) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:815) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:721) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] ... 33 common frames omitted Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.jpa.JpaVendorAdapter]: Factory method 'jpaVendorAdapter' threw exception; nested exception is java.lang.IllegalArgumentException: dataSource or dataSourceClassName or jdbcUrl is required. at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:579) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] ... 46 common frames omitted Caused by: java.lang.IllegalArgumentException: dataSource or dataSourceClassName or jdbcUrl is required. at com.zaxxer.hikari.HikariConfig.validate(HikariConfig.java:1063) ~[HikariCP-2.7.8.jar:na] at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:109) ~[HikariCP-2.7.8.jar:na] at org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:151) ~[spring-jdbc-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:115) ~[spring-jdbc-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:78) ~[spring-jdbc-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.jdbc.support.JdbcUtils.extractDatabaseMetaData(JdbcUtils.java:318) ~[spring-jdbc-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.jdbc.support.JdbcUtils.extractDatabaseMetaData(JdbcUtils.java:355) ~[spring-jdbc-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.boot.autoconfigure.orm.jpa.DatabaseLookup.getDatabase(DatabaseLookup.java:72) ~[spring-boot-autoconfigure-2.0.0.RELEASE.jar:2.0.0.RELEASE] at org.springframework.boot.autoconfigure.orm.jpa.JpaProperties.determineDatabase(JpaProperties.java:168) ~[spring-boot-autoconfigure-2.0.0.RELEASE.jar:2.0.0.RELEASE] at org.springframework.boot.autoconfigure.orm.jpa.JpaBaseConfiguration.jpaVendorAdapter(JpaBaseConfiguration.java:111) ~[spring-boot-autoconfigure-2.0.0.RELEASE.jar:2.0.0.RELEASE] at org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration$$EnhancerBySpringCGLIB$$738c1df5.CGLIB$jpaVendorAdapter$3() ~[spring-boot-autoconfigure-2.0.0.RELEASE.jar:2.0.0.RELEASE] at org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration$$EnhancerBySpringCGLIB$$738c1df5$$FastClassBySpringCGLIB$$beb7cb58.invoke() ~[spring-boot-autoconfigure-2.0.0.RELEASE.jar:2.0.0.RELEASE] at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) ~[spring-core-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:361) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE] at org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration$$EnhancerBySpringCGLIB$$738c1df5.jpaVendorAdapter() ~[spring-boot-autoconfigure-2.0.0.RELEASE.jar:2.0.0.RELEASE] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:564) ~[na:na] at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE] ... 47 common frames omitted Process finished with exit code 1 这是我的pom.xml：
org.springframework.boot spring-boot-starter-parent 2.0.0.RELEASE UTF-8 UTF-8 1.9 org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-properties-migrator org.springframework.boot spring-boot-starter-data-jpa org.postgresql postgresql org.springframework.boot spring-boot-starter-test test org.springframework.boot spring-boot-starter-web io.springfox springfox-swagger2 2.7.0 io.springfox springfox-swagger-ui 2.7.0 org.springframework.boot spring-boot-starter-security org.hibernate hibernate-core org.hibernate hibernate-entitymanager org.springframework.boot spring-boot-starter-mail 1.4.3.RELEASE
这是我的application.yml：
spring: application: name: Test jpa: hibernate: ddl-auto: update use-new-id-generator-mappings: true generate-ddl: true properties: dialect: org.hibernate.dialect.PostgreSQLDialect session: store-type: none datasource: driverClassName: org.postgresql.Driver url: jdbc:postgresql://localhost:5432/test username: test password: 1234 tomcat: max-idle: 2 max-active: 3 type: com.zaxxer.hikari.HikariDataSource
更新：
我的DatabaseConfig.java：
@Configuration public class DatabaseConfig { @Bean @Primary @ConfigurationProperties(prefix = "spring.datasource") public DataSource dataSource() { return DataSourceBuilder.create().build(); } @Bean public SimpleMailMessage templateSimpleMessage() { SimpleMailMessage message = new SimpleMailMessage(); message.setText( "This is the test email template for your email:\n%s\n"); return message; } }
如果您确实需要定义dataSource（），例如当您有多个数据源时，可以使用：
@Primary @Bean public DataSource customDataSource() { DriverManagerDataSource dataSource = new DriverManagerDataSource(); dataSource.setDriverClassName(env.getProperty("custom.datasource.driver-class-name")); dataSource.setUrl(env.getProperty("custom.datasource.url")); dataSource.setUsername(env.getProperty("custom.datasource.username")); dataSource.setPassword(env.getProperty("custom.datasource.password")); return dataSource; }
通过自己设置dataSource（而不是使用DataSourceBuilder），它解决了我也遇到的问题。
知识渊博的Baeldung有一个深入解释的教程。
由于这篇文章有点受欢迎，我编辑了一下。 Spring Boot 2.xx将默认的 JDBC连接池从Tomcat更改为更快更好的HikariCP。 这是不兼容的，因为HikariCP使用jdbc url的不同属性。 有两种方法可以处理它：
选项一
春季文档中有非常好的解释和解决方法：
此外，如果你碰巧在类路径上有Hikari，这个基本设置不起作用，因为Hikari没有url属性（但是有一个jdbcUrl属性）。 在这种情况下，您必须按如下方式重写配置：
app.datasource.jdbc-url=jdbc:mysql://localhost/test app.datasource.username=dbuser app.datasource.password=dbpass
选项二
在文档中还有如何让它从“两个世界”开始工作的方法。 它看起来像下面。 ConfigurationProperties bean将从app.datasource.url对jdbcUrl进行“转换”
@Configuration public class DatabaseConfig { @Bean @ConfigurationProperties("app.datasource") public DataSourceProperties dataSourceProperties() { return new DataSourceProperties(); } @Bean @ConfigurationProperties("app.datasource") public HikariDataSource dataSource(DataSourceProperties properties) { return properties.initializeDataSourceBuilder().type(HikariDataSource.class) .build(); } }
我也读过Spring文档，就像lapkritinis所说的那样 – 幸运的是，这让我走上了正确的道路！ 但我不认为，Spring文档现在解释了这个好处。 至少对我来说，他们并不一致恕我直言。
如果将现有的Spring Boot 1.5.x应用程序升级到使用PostgreSQL / Hibernate的2.0.x，原始问题或问题是如何处理。 你得到你描述的错误的主要原因是Spring Boot 2.0.x使用HikariCP而不是Tomcat JDBC池化DataSource作为默认值 – 而Hikari的DataSource不知道spring.datasource.url属性，而是它想要’ s有spring.datasource.jdbc-url （ lapkritinis也指出了）。
到现在为止还挺好。 但是文档也建议 – 这就是问题 – Spring Boot使用spring.datasource.url来确定， 如果 – 经常在本地使用 – 嵌入式数据库（如H2）必须退出并改为使用生产数据库 ：
您至少应该通过设置spring.datasource.url属性来指定URL。 否则，Spring Boot会尝试自动配置嵌入式数据库。
你可能会看到困境。 如果您希望像以前一样拥有嵌入式DataBase，则必须切换回Tomcat JDBC。 这对现有应用程序来说也是微创的，因为您不必更改源代码！ 要使用PostgreSQL在Spring Boot 1.5.x – > 2.0.x升级之后使现有应用程序正常工作，只需将tomcat-jdbc添加为pom.xml的依赖项：
org.apache.tomcat tomcat-jdbc
然后配置Spring Boot以在application.properties中相应地使用它：
spring.datasource.type=org.apache.tomcat.jdbc.pool.DataSource
希望能帮助一些人，这是一个非常耗时的问题。 我也希望我心爱的Spring人员更新文档 – 以及新Hikari池的配置方式 – 以获得更一致的Spring Boot用户体验:)
这件事发生在我身上，因为我正在使用
app.datasource.url=jdbc:mysql://localhost/test
当我用jdbc-url替换url然后它工作了。
app.datasource.jdbc-url=jdbc:mysql://localhost/test
在Spring Boot 2.0.*或更高Spring Boot 2.0.*配置两个DataSource
如果需要配置多个数据源，则必须将其中一个DataSource实例标记为@Primary ，因为@Primary各种自动配置希望能够按类型获取。
如果您创建自己的DataSource，则自动配置会退回。 在以下示例中，我们提供与主数据源上提供的自动配置完全相同的function集：
@Bean @Primary @ConfigurationProperties("app.datasource.first") public DataSourceProperties firstDataSourceProperties() { return new DataSourceProperties(); } @Bean @Primary @ConfigurationProperties("app.datasource.first") public DataSource firstDataSource() { return firstDataSourceProperties().initializeDataSourceBuilder().build(); } @Bean @ConfigurationProperties("app.datasource.second") public BasicDataSource secondDataSource() { return DataSourceBuilder.create().type(BasicDataSource.class).build(); }
必须将
firstDataSourceProperties标记为@Primary以便数据库初始化程序function使用您的副本（如果使用初始化程序）。
上面的方法是在spring boot 2.0迁移及以上版本中初始化多个数据库的正确方法。 更多阅读可以在这里找到。