如何配置弹簧引导以使用基于文件的 H2 数据库

2022-08-31 12:53:49

我已成功创建了一个使用内存中 H2 嵌入式数据库的 Spring Boot 应用程序。我现在想将其更改为将保留的基于文件的版本。

我尝试更改文件中的属性,它们看起来像这样:spring.datasource.*application.properties

spring.datasource.url=jdbc:h2:file:~/test;DB_CLOSE_ON_EXIT=FALSE
spring.datasource.username=test
spring.datasource.password=test
spring.datasource.driverClassName=org.h2.Driver`  

似乎Spring Boot只是忽略了这些设置,因为它只是按如下方式启动:

o.s.j.d.e.EmbeddedDatabaseFactory        : Starting embedded database: url='jdbc:h2:mem:testdb;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=false', username='sa'

My 包含以下可能与本文相关的依赖项:pom.xml

<parent>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-parent</artifactId>
  <version>1.3.5.RELEASE</version>
</parent>
....
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency> 
<dependency>
    <groupId>com.h2database</groupId>
    <artifactId>h2</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-devtools</artifactId>
</dependency>

我从文档和一些帖子中的理解是,配置应该只是工作,但对我来说没有运气。只是为了防止一些基本错误,我尝试并检查了以下内容:

  1. 我的应用程序属性位于类路径中:
  2. 我试图在注释中排除自动配置@EnableAutoConfiguration
  3. 我试图注入一个带有注释组合的bean,并用.以编程方式设置属性。这会导致与类型相关的其他错误。dataSource@Primary@ConfigurationProperties(prefix = "spring.datasource")DataSourceBuildernull

似乎我错过了一个关键概念或其他东西。任何人都可以帮忙。

更新1:从我的自动配置报告中提取:

Positive matches:
-----------------

    DataSourceAutoConfiguration matched
  - @ConditionalOnClass classes found: javax.sql.DataSource,org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType (OnClassCondition)

   DataSourceAutoConfiguration.DataSourceInitializerConfiguration matched
  - @ConditionalOnMissingBean (types: org.springframework.boot.autoconfigure.jdbc.DataSourceInitializer; SearchStrategy: all) found no beans (OnBeanCondition)

   DataSourceAutoConfiguration.EmbeddedConfiguration matched
  - embedded database H2 detected (DataSourceAutoConfiguration.EmbeddedDataSourceCondition)
  - @ConditionalOnMissingBean (types: javax.sql.DataSource,javax.sql.XADataSource; SearchStrategy: all) found no beans (OnBeanCondition)

   DataSourceAutoConfiguration.JdbcTemplateConfiguration matched
  - existing auto database detected (DataSourceAutoConfiguration.DataSourceAvailableCondition)

   DataSourceAutoConfiguration.JdbcTemplateConfiguration#jdbcTemplate matched
  - @ConditionalOnMissingBean (types: org.springframework.jdbc.core.JdbcOperations; SearchStrategy: all) found no beans (OnBeanCondition)

   DataSourceAutoConfiguration.JdbcTemplateConfiguration#namedParameterJdbcTemplate matched
  - @ConditionalOnMissingBean (types: org.springframework.jdbc.core.namedparam.NamedParameterJdbcOperations; SearchStrategy: all) found no beans (OnBeanCondition)

   DataSourceTransactionManagerAutoConfiguration matched
  - @ConditionalOnClass classes found: org.springframework.jdbc.core.JdbcTemplate,org.springframework.transaction.PlatformTransactionManager (OnClassCondition)

   DataSourceTransactionManagerAutoConfiguration.TransactionManagementConfiguration matched
  - @ConditionalOnMissingBean (types: org.springframework.transaction.annotation.AbstractTransactionManagementConfiguration; SearchStrategy: all) found no beans (OnBeanCondition)

    H2ConsoleAutoConfiguration matched
  - @ConditionalOnClass classes found: org.h2.server.web.WebServlet (OnClassCondition)
  - found web application StandardServletEnvironment (OnWebApplicationCondition)
  - matched (OnPropertyCondition)

   HibernateJpaAutoConfiguration matched
  - @ConditionalOnClass classes found: org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean,org.springframework.transaction.annotation.EnableTransactionManagement,javax.persistence.EntityManager (OnClassCondition)
  - found HibernateEntityManager class (HibernateJpaAutoConfiguration.HibernateEntityManagerCondition)

Negative matches:
-----------------

    DataSourceAutoConfiguration.NonEmbeddedConfiguration did not match
  - missing supported DataSource (DataSourceAutoConfiguration.NonEmbeddedDataSourceCondition)

`

更新2:添加了执行器并查看了端点。这里有趣的是,我的配置已被采用并且数据库存在,但是当应用程序运行时,它不会使用它 。/configpropsdataSource

"spring.datasource.CONFIGURATION_PROPERTIES":
    {"prefix":"spring.datasource",
     "properties":{
        "schema":null,
        "data":null,
        "xa":{"dataSourceClassName":null,
               "properties":{}
             },
        "type":null,
        "separator":";",
        "url":"jdbc:h2:file:~/test;DB_CLOSE_ON_EXIT=FALSE",
        "platform":"all",
        "continueOnError":false,
        "jndiName":null,               
        "sqlScriptEncoding":null,
        "password":"******",
        "name":"testdb",
        "driverClassName":"org.h2.Driver",
        "initialize":true,
        "username":"test"
        }
    }  

答案 1

我添加这个答案是为了避免混淆和进一步的研究。

实际上,我有同样的问题,没有一个答案完全适合我,而不是一些答案的组合有效。

以下是在春季引导中持久保存 H2 db 所需的最低配置。

应用程序.属性

# H2
spring.h2.console.enabled=true
spring.h2.console.path=/h2
# Datasource
spring.datasource.url=jdbc:h2:file:~/spring-boot-h2-db
spring.datasource.username=sa
spring.datasource.password=
spring.datasource.driver-class-name=org.h2.Driver
spring.jpa.hibernate.ddl-auto=update

这是诀窍。不需要其他任何内容。spring.jpa.hibernate.ddl-auto=update

无需在 pom 中添加 spring-boot-starter-jdbc.xml

无需在 jdbc url 中添加任何参数。


答案 2

请参阅 http://www.h2database.com/html/cheatSheet.html

我想这可能是jdbc.url的问题,像这样改变它:

# from:
spring.datasource.url=jdbc:h2:file:~/test;DB_CLOSE_ON_EXIT=FALSE

# to:
spring.datasource.url=jdbc:h2:~/test;DB_CLOSE_ON_EXIT=FALSE

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