springboot整合h2 demo

最新推荐文章于 2025-05-30 23:17:49 发布

转载最新推荐文章于 2025-05-30 23:17:49 发布 · 261 阅读

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原文链接：https://my.oschina.net/u/3886184/blog/1928941

文章标签：

#java #数据库

与其他数据库一样，配置配好即可 demo是使用hibernate jpa映射数据库

导入h2的jar包即可使用一个没有安装过的数据库 pom.xml

<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>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>

springboot入口

package com.h2demo.demo;

import org.springframework.beans.factory.annotation.Autowired;  
import org.springframework.boot.CommandLineRunner;  
import org.springframework.boot.SpringApplication;  
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication  
public class DemoApplication {

    public static void main(String\[\] args) {  
        SpringApplication.run(DemoApplication.class, args);  
    }
}

实体bean 映射数据库

@Entity
public class User {
    @Id
    @GeneratedValue
    private Long id;
    private String name;
    private int age;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}

controller层

@RestController
public class DemoController {

    @Autowired
    private UserDao userDao;

    @RequestMapping("save")
    public String save() {
        User user = new User();
        user.setName("xiaohong");
        user.setAge(15);
        userDao.save(user);

        user = new User();
        user.setName("xiaoming");
        user.setAge(16);
        userDao.save(user);

        return "ok";
    }

    @RequestMapping("find")
    public List<User> find() {
        return (List<User>) userDao.findAll();
    }
    
    @RequestMapping("findByName")
    public User findByName() {
        return userDao.findByName("xiaohong");
    }
}

JPA接口

public interface UserDao extends CrudRepository<User, Long>{
    User findByName(String name);
}

配置文件

//是否打印sql语句
spring.jpa.show-sql=true
//ddl执行方式，update create 等
spring.jpa.hibernate.ddl-auto=update
//数据库地址  `存放地址`
spring.datasource.url=jdbc:h2:file:~/.h2/testdb
//用户名
spring.datasource.username=aa
//密码
spring.datasource.password=aa
//驱动
spring.datasource.driverClassName=org.h2.Driver
//控制台查看数据库的路径  localhost:8080/h2-console
spring.h2.console.path=/h2-console
//是否启用h2控制台
spring.h2.console.enabled=true
//外网是否能连接到h2
spring.h2.console.settings.web-allow-others=true

转载于:https://my.oschina.net/u/3886184/blog/1928941