对于我的小型Spring Boot应用程序,我在src / main / resources下有这个配置:
server.port = 8090
spring.datasource.driverClassName = org.h2.Driver
spring.datasource.url = jdbc:h2:file:~/stapler
我知道此配置已正确选取,因为应用程序启动日志中存在有效的端口号8090。还有一个@PostConstruct initDb()方法,它创建数据并将数据插入该数据库的2个表中:
package com.avk.stapler.init;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.jdbc.core.JdbcTemplate;
import javax.annotation.PostConstruct;
@SpringBootApplication
public class DbInitializer {
@Autowired
private JdbcTemplate jdbcTemplate;
public static void main(String[] args) {
SpringApplication.run(DbInitializer.class, args);
}
@PostConstruct
private void initDb() {
System.out.println("Creating table employees");
jdbcTemplate.execute("drop table employees if exists");
jdbcTemplate.execute("create table employees(id serial, name varchar(255), surname varchar(255))");
jdbcTemplate.execute("insert into employees(name, surname) values('Jan', 'Kowalski')");
jdbcTemplate.execute("insert into employees(name, surname) values('Stefan', 'Nowak')");
System.out.println("Creating table allocations");
jdbcTemplate.execute("drop table allocations if exists");
jdbcTemplate.execute("create table allocations(id serial, week int, year int, shift int, employee_id bigint)");
jdbcTemplate.execute("insert into allocations(week, year, shift, employee_id) values(29, 2015, 1, 1)");
jdbcTemplate.execute("insert into allocations(week, year, shift, employee_id) values(28, 2015, 2, 1)");
jdbcTemplate.execute("insert into allocations(week, year, shift, employee_id) values(29, 2015, 3, 2)");
jdbcTemplate.execute("insert into allocations(week, year, shift, employee_id) values(28, 2015, 2, 2)");
}
}
我可以在启动时看到这个记录,我认为没有更多关于DB的日志:
2015-09-30 22:41:22.948 INFO 2832 --- [ main] o.s.j.d.e.EmbeddedDatabaseFactory : Creating embedded database 'testdb'
Creating table employees
Creating table allocations
由于上述原因,我想在我的主目录中看到“stapler.h2.db”文件,但实际情况并非如此。这里应该更改DB文件出现的内容?
答案 0 :(得分:9)
确保您的maven依赖项如下所示:
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
如果要使用JDBC将H2用作远程数据库,则需要确保已在连接URL中的指定文件路径上运行H2数据库。
如果您尚未安装H2,可以在此处获取在服务器模式下运行H2的说明:http://www.h2database.com/html/tutorial.html#tutorial_starting_h2_console
运行后,您可以使用您提供的相同JDBC连接URL连接到它。只需使用以下应用程序属性。
spring.datasource.url=jdbc:h2:tcp://localhost/~/stapler
spring.datasource.username=sa
spring.datasource.password=
如果您希望嵌入式H2数据库创建H2文件,那也是可能的。只需使用下面的配置。
spring.datasource.url=jdbc:h2:file:~/stapler;AUTO_SERVER=true
spring.datasource.username=
spring.datasource.password=
创建的文件可能名为stapler.mv.db
。要告诉H2嵌入式使用stapler.h2.db
,您可以在此处了解如何执行此操作:Why is my embedded h2 program writing to a .mv.db file
(非常感谢StéphaneNicoll帮我回答这个问题)
答案 1 :(得分:1)
在application.properties中尝试此操作。它对我有用:
spring.datasource.url=jdbc:h2:~/test
spring.datasource.driverClassName=org.h2.Driver
spring.datasource.username=sa
spring.datasource.password=
spring.jpa.database-platform=org.hibernate.dialect.H2Dialect