springboot整合h2数据库

一、idea新建一个maven项目，首先看下我的项目结构

 

 

 2.pom文件引入依赖

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.jjp.cloud</groupId>
    <artifactId>microservice-simple-provider-user</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <parent>
        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-parent -->
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>1.5.9.RELEASE</version>
    </parent>

    <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-data-jpa -->
        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-data-jpa -->
        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-data-jpa -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>


        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.h2database/h2 -->
        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.8</version>
            <scope>provided</scope>
        </dependency>

    </dependencies>

    <!--引入spring cloud的依赖-->
    <dependencyManagement>
        <dependencies>
            <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-dependencies -->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Edgware.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-maven-plugin -->
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

3.下载并安装h2数据库

h2数据库下载链接：http://www.h2database.com/html/download.html

下载好直接减压缩安装

找到安装目录下的bin目录打开这个文件夹运行h2.bat 或者h2w.bat(后台运行)

运行成功后 http://localhost:8082 访问 H2 数据库的 Web Console

 

 

 

 

 

 

 

 

win10系统角标里面选择h2 console ,鼠标右键选择 create new databases 

 

 

创建成功后，记住创建的账号名和密码

4.创建application.yml配置文件

server:
  port:8000
spring:
  jpa:
    # 是否生成ddl语句
    generate-ddl: false
    # 是否打印sql语句
    show-sql: true
    # 自动生成ddl，由于指定了具体的ddl，此处设置为none
    hibernate:
      ddl-auto: none
  datasource:
    # 使用H2数据库
    platform: h2
    # 指定生成数据库的schema文件位置
    schema: classpath:schema.sql
    # 指定插入数据库语句的脚本位置
    data: classpath:data.sql
    #  数据库地址
    url: jdbc:h2:./test
    #数据库驱动
    driver-class-name: org.h2.Driver
    #数据库用户名
    username: sa
    #数据库密码
    password: 123456
  h2:
    console:
      settings:
        # 进行该配置后，h2 web consloe就可以在远程访问了。否则只能在本机访问。
        web-allow-others: true
        #进行该配置，你就可以通过YOUR_URL/h2访问h2 web consloe。YOUR_URL是你程序的访问URl。
      path: /h2
      #进行该配置，程序开启时就会启动h2 web consloe。当然这是默认的，如果你不想在启动程序时启动h2 web consloe，那么就设置为false。
      enabled: true
      
      # 配置日志打印信息 
logging:
  level:
    root: INFO
    org.hibernate: INFO
    org.hibernate.type.descriptor.sql.BasicBinder: trace
    org.hibernate.type.descriptor.sql.BasicExtractor: trace

 

5.创建实体类

package com.jjp.cloud.entity;

import lombok.Data;

import javax.persistence.*;
import java.math.BigDecimal;

@Entity
@Data
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
    @Column
    private String username;
    @Column
    private String name;
    @Column
    private Integer age;
    @Column
    private BigDecimal balance;
}

6.创建dao

package com.jjp.cloud.dao;

import com.jjp.cloud.entity.User;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

@Repository
public interface UserRepository extends JpaRepository<User,Long> {

}

7.创建controller层，进行接口访问测试

package com.jjp.cloud.controller;


import com.jjp.cloud.dao.UserRepository;
import com.jjp.cloud.entity.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class UserController {
    @Autowired
    private UserRepository userRepository;

    @GetMapping("/{id}")
    public User findByid(@PathVariable Long id){
        User findOne = this.userRepository.findOne(id);
        return findOne;
    }
}

8.浏览器访问：http://localhost:8080/1 进行测试 返回下面结果就表明成功整合h2数据库

 

 

　　如果有疑问可以发邮件到我邮箱进行交流探讨：[e-mail]