如何配置spring-boot以使用基于文件的H2数据库 [英] How to configure spring-boot to use file based H2 database

问题描述

我已经成功创建了一个使用内存中的H2嵌入式数据库的Spring Boot应用程序.我现在想将其更改为将继续存在的基于文件的版本.

I have successfully created a spring boot application that uses the H2 embedded database in-memory. I would now like to change this to a file based version that will persist.

我尝试只更改我的application.properties文件中的spring.datasource.*属性，它们看起来像这样:

I have tried just changing the spring.datasource.* properties in my application.properties file and they look something like this:

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`  

spring boot似乎忽略了这些设置，因为它的启动过程如下:

It seems like spring boot just ignores these settings because it just starts as follows:

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'

我的pom.xml包含以下与这篇文章可能相关的依赖项:

My pom.xml contains the following dependencies that may be relevant to this post:

<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>

从文档和许多帖子中我的理解是，配置应该可以正常工作，但是对我来说没有任何运气.为了防止某些基本错误，我尝试并检查了以下内容:

My understanding from the documentation and a number of posts is that the configuration should just work but no luck for me. Just to prevent some of the basic errors I have tried and checked the following:

1. 我的应用程序属性在类路径中:
2. 我试图在注释@EnableAutoConfiguration
中排除自动配置
3. 我尝试注入带有注释@Primary，@ConfigurationProperties(prefix = "spring.datasource")组合的dataSource bean，并使用DataSourceBuilder编程设置属性.这会导致其他与类型为null的错误.

1. My application properties is in the classspath:
2. I have tried to exclude the auto configuration in annotation @EnableAutoConfiguration
3. I have tried to inject a dataSource bean with combinations of annotation @Primary, @ConfigurationProperties(prefix = "spring.datasource") and setting the properties programmatically with DataSourceBuilder. This causes other errors related to the type being null.

似乎我缺少一个关键概念或某些东西.谁能帮忙.

Seems like I am missing a key concept or something. Can anyone help.

更新1:从我的自动配置报告中提取:

UPDATE 1: Extract from my auto configuration report:

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/configprops.这里有趣的是，我的配置已被使用并且数据库存在，但是当应用程序运行时，它不使用此dataSource.

UPDATE 2: added actuator and looked at endpoint /configprops. What is interesting here is that my config has been taken and the database exists but when the application runs it does not use this dataSource.

"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"
        }
    }  

推荐答案

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

我想jdbc.url可能有问题，请像这样更改它:

I guess it might be problem with the jdbc.url, change it like this:

# 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

这篇关于如何配置spring-boot以使用基于文件的H2数据库的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！