SpringBoot整合SpringDataJPA

  通过前面多篇文件对SpringDataJPA的介绍，相信大家应该已经对SpringDataJPA很熟悉了，使用起来还是蛮方便的，只是在整合的时候需要添加大量的配置文件，本文来给大家介绍下SpringBoot整合SpringDataJPA的过程

其他JPA接口的实现参考此链接:​

SpringBoot整合SpringDataJPA

1.构建SpringBoot项目

  通过IDEA创建一个SpringBoot项目。添加如下依赖。

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <!-- springBoot的启动器 -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>

    <!-- 测试工具的启动器 -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
    </dependency>

    <!-- mysql -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.47</version>
    </dependency>

    <!-- druid连接池 -->
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid</artifactId>
        <version>1.0.9</version>
    </dependency>
</dependencies>

2.添加相关的配置

  在application.properties中添加如下配置

# jdbc 的相关信息
spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/ssm?characterEncoding=utf-8
spring.datasource.username=root
spring.datasource.password=123456

# 配置连接池信息
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource

# 配置jpa的相关参数
spring.jpa.hibernate.ddl-auto=update
spring.jpa.show-sql=true

这比我们在Spring中整合SpringDataJPA的配置文件要简单很多！

3.创建pojo

/**
 * @program: spring-boot-data-jpa-demo
 * @description: pojo
 * @author: 波波烤鸭
 * @create: 2019-05-20 11:15
 */
@Entity
@Table(name="t_users")
public class Users {

    @Id
    @GeneratedValue(strategy= GenerationType.IDENTITY)
    @Column(name="id")
    private Integer id;

    @Column(name="name")
    private String name;

    @Column(name="age")
    private Integer age;

    @Column(name="address")
    private String address;

    public Integer getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

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

    public Integer getAge() {
        return age;
    }

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

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    @Override
    public String toString() {
        return "Users [id=" + id + ", name=" + name + ", age=" + age + ", address=" + address + "]";
    }
}

4.创建dao接口

  创建Dao的接口，实现Repository接口

/**
 * @program: spring-boot-data-jpa-demo
 * @description: Dao接口
 * @author: 波波烤鸭
 * @create: 2019-05-20 11:17
 */

import com.dpb.spring_boot_data_jpa_demo.pojo.Users;
import org.springframework.data.jpa.repository.JpaRepository;

/**
 * 参数一 T :当前需要映射的实体
 * 参数二 ID :当前映射的实体中的OID的类型
 *
 */
public interface UsersRepository extends JpaRepository<Users,Integer> {

}

5.创建启动器

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class SpringBootDataJpaDemoApplication {

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

}

6.单元测试

import com.dpb.spring_boot_data_jpa_demo.dao.UsersRepository;
import com.dpb.spring_boot_data_jpa_demo.pojo.Users;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
@SpringBootTest(classes = SpringBootDataJpaDemoApplication.class)
public class SpringBootDataJpaDemoApplicationTests {

    @Autowired
    private UsersRepository usersRepository;

    @Test
    public void testSave(){
        Users users = new Users();
        users.setAddress("深圳固戍");
        users.setAge(20);
        users.setName("张三");
        this.usersRepository.save(users);
    }
}