SpringBoot_12.1 H2练习JPA

配置application.yml

server:
 port: 80
spring:
 datasource:
  dirverClassName: org.h2.Driver
  url: jdbc:h2:file:F:\\project\\h2\\config\\h2Database;AUTO_SERVER=TRUE
  username: root
  password: 1234
 jpa:
  database: h2
  hibernate:
   ddl-auto: update
   show-sql: true
 h2:
  console:
   path: /h2
   enabled: true

H2可以使用内存模式，服务器模式和分布式模式，但就把它当做普通的本地数据库的话配置成本地服务器模式即可。上面的就是配置到本地F:\\project\\h2\\config文件夹下面，它会看是否存在h2Database文件，存在就从里面读取数据，不存在就新建。在jpa的配置中使用了update，意思是只要结构一样，用原来的，不一样推到重建。访问http://localhost/h2你会有惊喜发现！

pom配置

     <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.7.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>