ShardingSphere 分库分表

https://shardingsphere.apache.org/

Spring Initializr

https://start.springboot.io/

MySQL 环境准备

create schema `sharding-jdbc`;

use `sharding-jdbc`;
create table tb_device(
    device_id bigint not null auto_increment,
    device_type int default null,
    primary key (device_id)
);

create table tb_device_0 like tb_device;
create table tb_device_1 like tb_device;

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.7.5</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <groupId>com.example</groupId>
    <artifactId>shardingjdbc-demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <properties>
        <java.version>8</java.version>
    </properties>

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

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-jdbc -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.24</version>
            <scope>provided</scope>
        </dependency>

        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.31</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.baomidou/mybatis-plus-boot-starter -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.5.2</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.shardingsphere/sharding-jdbc-spring-boot-starter -->
        <dependency>
            <groupId>org.apache.shardingsphere</groupId>
            <artifactId>sharding-jdbc-spring-boot-starter</artifactId>
            <version>4.1.1</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

TbDevice.java

package com.example.entity;

import lombok.Data;

@Data
public class TbDevice {
    private Long deviceId;
    private Integer deviceType;
}

TbDeviceMapper.java

package com.example.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.example.entity.TbDevice;

public interface TbDeviceMapper extends BaseMapper<TbDevice> {
}

application.properties

# 配置真实数据源
spring.shardingsphere.datasource.names=ds1
# 配置第 1 个数据源
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://localhost:3306/sharding-jdbc
spring.shardingsphere.datasource.ds1.username=root
spring.shardingsphere.datasource.ds1.password=*c_c>CLos7cf
# 配置物理表
spring.shardingsphere.sharding.tables.tb_device.actual-data-nodes=ds1.tb_device_$->{0..1}
# 配置分表策略
spring.shardingsphere.sharding.tables.tb_device.table-strategy.inline.sharding-column=device_id
spring.shardingsphere.sharding.tables.tb_device.table-strategy.inline.algorithm-expression=tb_device_$->{device_id%2}
# 开启SQL显示
spring.shardingsphere.props.sql.show=true

测试类 DemoApplicationTests.java

package com.example.demo;

import com.example.entity.TbDevice;
import com.example.mapper.TbDeviceMapper;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
class DemoApplicationTests {

    @Autowired
    private TbDeviceMapper tbDeviceMapper;

    @Test
    void contextLoads() {
        for (int i = 0; i < 10; i++) {
            TbDevice tbDevice = new TbDevice();
            tbDevice.setDeviceId(i + 1L);
            tbDevice.setDeviceType(i);
            tbDeviceMapper.insert(tbDevice);
        }
    }
}

（全文完）