SpringBoot整合SpringDataJPA

Bertha 。 2022-01-28 23:29 565阅读 0赞

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

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其他JPA接口的实现参考此链接:  
[https://dpb-bobokaoya-sm.blog.csdn.net/column/info/38759][https_dpb-bobokaoya-sm.blog.csdn.net_column_info_38759]

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# 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>
    
        
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
    
        
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
        </dependency>
    
        
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>
    
        
        <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);
        }
    }

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9kcGItYm9ib2thb3lhLXNtLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70]

![在这里插入图片描述][20190520114231194.png]

[https_dpb-bobokaoya-sm.blog.csdn.net_column_info_38759]: https://dpb-bobokaoya-sm.blog.csdn.net/column/info/38759
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9kcGItYm9ib2thb3lhLXNtLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70]: /images/20220129/7a999840358141e6a614c6185be563f5.png
[20190520114231194.png]: /images/20220129/eba6e02bab84441b8fbde6db644685f1.png