h2

Reset Embedded H2 database periodically

こ雲淡風輕ζ 提交于 2019-12-03 05:28:24
问题 I'm setting up a new version of my application in a demo server and would love to find a way of resetting the database daily. I guess I can always have a cron job executing drop and create queries but I'm looking for a cleaner approach. I tried using a special persistence unit with drop-create approach but it doesn't work as the system connects and disconnects from the server frequently (on demand). Is there a better approach? 回答1: H2 supports a special SQL statement to drop all objects: DROP

HTML 笔记

谁说我不能喝 提交于 2019-12-03 04:55:05
不断更新中。。。。 HTML标题 HTML标题:是通过<h1>...<h6>表示,例如 <h1>Title</h1> <h2>Title</h2> HTML水平线:<hr /> HTML注释:<!-- 注释内容 --> 来源: https://www.cnblogs.com/Vagrant-ac/p/11778649.html

springboot启动时报错Cannot determine embedded database driver class for database type NONE解决办法

蓝咒 提交于 2019-12-03 04:31:47
springboot启动报错如下图: 出错原因: springboot启动时会自动注入数据源及配置jpa 解决办法: 1,在pom文件中加h2引用 <dependency> <groupId>com.h2database</groupId> <artifactId>h2</artifactId> <scope>runtime</scope></dependency> 2.在启动类上加上 @SpringBootApplication(exclude={DataSourceAutoConfiguration.class,HibernateJpaAutoConfiguration.class}) 3,以上解决办法只是针对该springboot应用不与数据库之间有交互的场景下,使用, 若应用与数据库有交互,那么 @SpringBootApplication ( exclude= {DataSourceAutoConfiguration. class,HibernateJpaAutoConfiguration. class }) 是不能用的!!!!! 来源: https://www.cnblogs.com/liqiang0728/p/11777405.html

JPA connection with H2 database

断了今生、忘了曾经 提交于 2019-12-03 03:13:29
I am developing a hibernate with JPA project and trying to get the working persistence.xml by using H2(Embedded database). Persistence.xml <persistence xmlns="http://java.sun.com/xml/ns/persistence" version="1.0"> <persistence-unit name="DefaultPersistenceUnit" transaction-type="RESOURCE_LOCAL"> <provider>org.hibernate.ejb.HibernatePersistence</provider> <class>entity.user</class> <properties> <property name="hibernate.connection.url" value="jdbc:h2:/~test" /> --> <property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect"></property> <property name="hibernate.connection.driver

Package and use embedded database (H2.db file) inside a Jar?

梦想与她 提交于 2019-12-03 03:02:45
I'm using H2 embedded database for my application. I would like to contain everything the application needs in it's own Jar, including it's database if possible. My app does not need to create temp files or anything, so basically the user just runs the Jar. Is it possible to embed a database inside a Jar, and be able to INSERT new records as well as just SELECT out? EDIT: Just to clarify, I'm not looking to embed the H2 driver jar inside my distributable jar, I'm looking to embed the h2 database file ( someDatabase.h2.db file) inside a Jar and still be able to write/read from that database. If

What is the default username and password for h2 when there&#039;s nothing explicit in JDBC?

匿名 (未验证) 提交于 2019-12-03 02:54:01
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: From a program, I created a H2 database without specifying any user or password in the JDBC URL. Now I'm trying to access that database with the Script tool. The doc says to use -user sa in the default case. That doesn't work, and it still doesn't work if I either add -password sa or remove -user . What am I missing? /opt/h2/bin java -cp h2-1.3.161.jar org.h2.tools.Script -url jdbc:h2:/data/jug/jas-coref.h2 -user sa -password sa -script /data/jug/ris-start.sql Exception in thread "main" org.h2.jdbc.JdbcSQLException: Wrong user name or

Why is H2 larger than H1?

匿名 (未验证) 提交于 2019-12-03 02:49:01
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: In the following code snippet, why is the H2 content larger than the H1 content? <article> <section> <header> <h1> First Header </h1> </header> </section> <section> <header> <h2> Second Header </h2> </header> </section> </article> http://jsfiddle.net/abugp/ Why is the H1 content larger in the snippet below but not the one above? <h1> First Line </h1> <h2> Second Line </h2> http://jsfiddle.net/59T43/ 回答1: Since you haven't specified any styles, the size of the headings is determined by your browser's default style sheet. In

Spring’s embedded H2 datasource and DB_CLOSE_ON_EXIT

匿名 (未验证) 提交于 2019-12-03 02:45:02
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: For unit tests (call them integration tests if you want) I have configured an embedded database in my Spring config like so: <jdbc:embedded-database id="dataSource" type="H2"> <jdbc:script location="classpath:schema_h2.sql" /> </jdbc:embedded-database> Now, when running the tests from the command line, they work fine, but I get some errors at the end (harmless, but irritating): WARN 2013-03-25 12:20:22,656 [Thread-9] o.s.j.d.e.H2EmbeddedDatabaseConfigurer 'Could not shutdown embedded database' org.h2.jdbc.JdbcSQLException: Database is

H2 database error: Database may be already in use: “Locked by another process”

匿名 (未验证) 提交于 2019-12-03 02:45:02
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I am trying to use the H2 database from a Java application. I created the database and its tables through the H2 Console and then I try to connect from Java using Connection con = DriverManager.getConnection("jdbc:h2:~/dbname", "username", "password"); However I receive the following error: Exception in thread "main" org.h2.jdbc.JdbcSQLException: Database may be already in use: "Locked by another process". Possible solutions: close all other connection(s); use the server mode [90020-161] I tried to delete the dbname.lock.db file but it is

how to use @DataJpaTest with multiple datasourse

匿名 (未验证) 提交于 2019-12-03 02:33:02
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I tried to write integration test using annotation @DataJpaTest . I have two datasource: Primary and secondary (class config) in result i have an error: expected single matching bean but found 2: primaryDataSource,secondary then i tried to add a annotation @AutoConfigureTestDatabase(replace= AutoConfigureTestDatabase.Replace.AUTO_CONFIGURED) and With AUTO_CONFIGURED only DataSources configured by properties will be replaced but instead embedded h2 i saw Dialect : HHH000400: Using dialect: org.hibernate.dialect.Oracle10gDialect how using