导入jar包
<properties>
<!--JDK版本,如果是jdk8则这里是 1.8-->
<java.version>1.8</java.version>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<spring.boot.version>2.5.5</spring.boot.version>
<mybatisplus.boot.starter.version>3.4.0</mybatisplus.boot.starter.version>
<lombok.version>1.18.16</lombok.version>
<sharding-jdbc.version>4.1.1</sharding-jdbc.version>
<junit.version>4.12</junit.version>
<druid.version>1.1.16</druid.version>
<!--跳过单元测试-->
<skipTests>true</skipTests>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>${spring.boot.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<version>${spring.boot.version}</version>
<scope>test</scope>
</dependency>
<!--mybatis plus和springboot整合-->
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>${mybatisplus.boot.starter.version}</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.27</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<!--<scope>provided</scope>-->
</dependency>
<dependency>
<groupId>org.apache.shardingsphere</groupId>
<artifactId>sharding-jdbc-spring-boot-starter</artifactId>
<version>${sharding-jdbc.version}</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>${spring.boot.version}</version>
<configuration>
<fork>true</fork>
<addResources>true</addResources>
</configuration>
</plugin>
</plugins>
</build>
2、数据库和表结构

3、Springboot配置
# 应用名称
spring.application.name=sharding-jdbc
logging.level.root=INFO
# 打印执行的数据库以及语句
spring.shardingsphere.props.sql.show=true
# 数据源 db0
spring.shardingsphere.datasource.names=ds0,ds1
# 第一个数据库
spring.shardingsphere.datasource.ds0.type=com.zaxxer.hikari.HikariDataSource
spring.shardingsphere.datasource.ds0.driver-class-name=com.mysql.cj.jdbc.Driver
spring.shardingsphere.datasource.ds0.jdbc-url=jdbc:mysql://127.0.0.1:3306/xdclass_shop_order_0?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=Asia/Shanghai&allowPublicKeyRetrieval=true
spring.shardingsphere.datasource.ds0.username=root
spring.shardingsphere.datasource.ds0.password=123456
# 第二个数据库
spring.shardingsphere.datasource.ds1.type=com.zaxxer.hikari.HikariDataSource
spring.shardingsphere.datasource.ds1.driver-class-name=com.mysql.cj.jdbc.Driver
spring.shardingsphere.datasource.ds1.jdbc-url=jdbc:mysql://127.0.0.1:3306/xdclass_shop_order_1?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=Asia/Shanghai&allowPublicKeyRetrieval=true
spring.shardingsphere.datasource.ds1.username=root
spring.shardingsphere.datasource.ds1.password=123456
#配置workId
spring.shardingsphere.sharding.tables.product_order.key-generator.props.worker.id=1
#配置广播表
spring.shardingsphere.sharding.broadcast-tables=ad_config
spring.shardingsphere.sharding.tables.ad_config.key-generator.column=id
spring.shardingsphere.sharding.tables.ad_config.key-generator.type=SNOWFLAKE
#水平分库
spring.shardingsphere.sharding.tables.product_order.database-strategy.inline.sharding-column=user_id
spring.shardingsphere.sharding.tables.product_order.database-strategy.inline..algorithm-expression=ds$->{user_id%2}
# 指定product_order表的数据分布情况,配置数据节点,行表达式标识符使用 ${...} 或 $->{...},但前者与 Spring 本身的文件占位符冲突,所以在 Spring 环境中建议使用 $->{...}
#水平分表
#spring.shardingsphere.sharding.tables.product_order.actual-data-nodes=ds0.product_order_$->{0..1}
spring.shardingsphere.sharding.tables.product_order.actual-data-nodes=ds$->{0..1}.product_order_$->{0..1}
# 指定product_order表的分片策略,分片策略包括【分片键和分片算法】
spring.shardingsphere.sharding.tables.product_order.table-strategy.inline.sharding-column=id
spring.shardingsphere.sharding.tables.product_order.table-strategy.inline..algorithm-expression=product_order_$->{id%2}
#雪花算法
#id生成策略
spring.shardingsphere.sharding.tables.product_order.key-generator.column=id
spring.shardingsphere.sharding.tables.product_order.key-generator.type=SNOWFLAKE