springboot整合ShardingSphere ,数据库分库分表怎么实现
时间: 2023-06-29 13:06:58 浏览: 169
Spring Boot整合ShardingSphere,实现数据库分库分表的步骤如下:
1. 引入ShardingSphere的相关依赖:
```xml
<dependency>
<groupId>org.apache.shardingsphere</groupId>
<artifactId>sharding-jdbc-core</artifactId>
<version>${shardingsphere.version}</version>
</dependency>
<dependency>
<groupId>org.apache.shardingsphere</groupId>
<artifactId>sharding-jdbc-spring-boot-starter</artifactId>
<version>${shardingsphere.version}</version>
</dependency>
```
2. 配置ShardingSphere的数据源
在application.yml中进行配置,示例代码:
```yaml
spring:
shardingsphere:
datasource:
names: ds0, ds1
ds0:
type: com.zaxxer.hikari.HikariDataSource
driver-class-name: com.mysql.cj.jdbc.Driver
jdbc-url: jdbc:mysql://localhost:3306/test0?serverTimezone=UTC&useSSL=false&useUnicode=true&characterEncoding=utf-8
username: root
password: root
ds1:
type: com.zaxxer.hikari.HikariDataSource
driver-class-name: com.mysql.cj.jdbc.Driver
jdbc-url: jdbc:mysql://localhost:3306/test1?serverTimezone=UTC&useSSL=false&useUnicode=true&characterEncoding=utf-8
username: root
password: root
sharding:
tables:
order:
actualDataNodes: ds$->{0..1}.order_$->{0..1}
tableStrategy:
inline:
shardingColumn: order_id
algorithmExpression: order_$->{order_id % 2}
keyGenerateStrategy:
column: order_id
keyGeneratorName: snowflake
default-key-generator:
type: SNOWFLAKE
worker-id: 123
```
其中,`names`字段指定数据源的名称,`ds0`和`ds1`则为具体的数据源配置,`actualDataNodes`字段指定了数据表的实际节点,`tableStrategy`字段指定了分表策略,`keyGenerateStrategy`字段指定了键生成策略。
3. 配置ShardingSphere的规则
```yaml
spring:
shardingsphere:
sharding:
default-database-strategy:
inline:
shardingColumn: user_id
algorithmExpression: ds$->{user_id % 2}
```
其中,`default-database-strategy`字段指定了分库策略,`inline`表示使用取模算法进行分库,`shardingColumn`字段指定了分库的列名。
4. 在代码中使用
在代码中使用时,只需要正常使用JPA或Mybatis等ORM框架即可。ShardingSphere会自动根据配置进行数据分片。
以上就是Spring Boot整合ShardingSphere实现数据库分库分表的步骤。
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