springboot集成springData Jpa

我就是我 2021-11-04 11:22 413阅读 0赞

## 8.springboot集成springData Jpa ##

### 8.1添加springData Jpa的起步依赖 ###

![20190809182216990.png][]

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-data-jpa</artifactId>

</dependency>

添加数据库坐标

![201908091822172.png][]

<groupId>mysql</groupId>

<artifactId>mysql-connector-java</artifactId>

</dependency>

### 8.2添加配置文件 ###

数据库配置信息

![20190809182348294.png][]

<table> 
 <tbody> 
  <tr> 
   <td style="vertical-align:top;width:414.8pt;"> <p style="margin-left:0cm;">#DB Configuration:</p> <p style="margin-left:0cm;">spring.datasource.driverClassName=com.mysql.jdbc.Driver</p> <p style="margin-left:0cm;">spring.datasource.url=jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&amp;characterEncoding=utf8</p> <p style="margin-left:0cm;">spring.datasource.username=root</p> <p style="margin-left:0cm;">spring.datasource.password=root</p> </td> 
  </tr> 
 </tbody> 
</table>

Jpa

![2019080918221721.png][]

<table> 
 <tbody> 
  <tr> 
   <td style="vertical-align:top;width:414.8pt;"> <p style="margin-left:0cm;">#JPA Configuration:</p> <p style="margin-left:0cm;">spring.jpa.database=MySQL</p> <p style="margin-left:0cm;">spring.jpa.show-sql=true</p> <p style="margin-left:0cm;">spring.jpa.generate-ddl=true</p> <p style="margin-left:0cm;">spring.jpa.hibernate.ddl-auto=update</p> <p style="margin-left:0cm;">spring.jpa.hibernate.naming_strategy=org.hibernate.cfg.ImprovedNamingStrategy</p> </td> 
  </tr> 
 </tbody> 
</table>

### 8.3配置domain.User ###

@Entity注解

//主键

@Id

@GeneratedValue(strategy = GenerationType.IDENTITY)

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1J1X3lpbl9oYWk_size_16_color_FFFFFF_t_70][]

### 8.4创建repository ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1J1X3lpbl9oYWk_size_16_color_FFFFFF_t_70 1][]

[20190809182216990.png]: /images/20211104/cffd2842842e46038b5acc20643307bb.png
[201908091822172.png]: /images/20211104/2299c0742a04476fa090e8c1227c93d1.png
[20190809182348294.png]: /images/20211104/1f7f75dec8804a3a84a74a5005da1df5.png
[2019080918221721.png]: /images/20211104/2b12034d611b42a2a66e48136a8cd705.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1J1X3lpbl9oYWk_size_16_color_FFFFFF_t_70]: /images/20211104/2c20838d5da94a92b4f12e45d98c0ce6.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1J1X3lpbl9oYWk_size_16_color_FFFFFF_t_70 1]: /images/20211104/ae2bb17c227147e5a7523d6c196630dd.png