Sharding-JDBC读写分离如何配置？主从数据库实现详解

//创建数据表
CREATE TABLE `user` (
    `id` BIGINT(20) NOT NULL COMMENT 'Id',
    `name` VARCHAR(20) NOT NULL COMMENT '名称',
    `phone` VARCHAR(20) NOT NULL COMMENT '电话',
    `email` VARCHAR(20) NOT NULL COMMENT '邮箱',
    PRIMARY KEY (`id`)
) 

#sharding-jdbc 水平分库规则配置

# 数据源名称，多数据源逗号隔开
spring.shardingsphere.datasource.names=ds0,ds1
# 配置第一个库
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/test?useUnicode=true&useSSL=false&zeroDateTimeBehavior=convertToNull&characterEncoding=UTF-8&allowMultiQueries=true&serverTimezone=Asia/Shanghai
spring.shardingsphere.datasource.ds0.username=root
spring.shardingsphere.datasource.ds0.password=123456
# 配置第二个库
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://127.0.0.1:3307/test?useUnicode=true&useSSL=false&zeroDateTimeBehavior=convertToNull&characterEncoding=UTF-8&allowMultiQueries=true&serverTimezone=Asia/Shanghai
spring.shardingsphere.datasource.ds1.username=root
spring.shardingsphere.datasource.ds1.password=123456

# 配置主从规则
# 指定主库，ms为任意值，表主从同步别名
spring.shardingsphere.sharding.master-slave-rules.ms.master-data-source-name=ds0
# 指定从库，ms为任意值，表主从同步别名
spring.shardingsphere.sharding.master-slave-rules.ms.slave-data-source-names=ds1

# 如果既有读写分离又有数据分片，则配置规则如下：
# actual-data-nodes节点后的数据源名称要写成，主从同步数据源的别名 : ms
# spring.shardingsphere.sharding.tables.user.actual-data-nodes = ms.t_user


## 打开sql输出日志
spring.shardingsphere.props.sql.show=true

public class User implements Serializable {
    private Long id;

    private String name;

    private String phone;

    private String email;
    
    .....
}

@RestController
@RequestMapping("test")
public class TestController {

    // TODO DEMO配置文件中，存在多种配置策略，如何只需要对某一种类型进行测试，则需要修改配置文件配置
    @Resource
    private TestService testService;


    @GetMapping("/read/write")
    public Object dataReadWrite() {
        return testService.dataReadWrite();
    }
}

@Service
public class TestService {

    @Resource
    private MasterSlaveMapper masterSlaveMapper;

    public Object dataReadWrite() {

        // 插入
        User user = new User();
        user.setId(1L);
        user.setName("Name");
        user.setPhone("phone");
        user.setEmail("email");
        masterSlaveMapper.insertMasterSlave(user);

        // 修改
        masterSlaveMapper.updateMasterSlaveById(1L, "修改名称");
        // 删除
        masterSlaveMapper.deleteMasterSlaveById(2L);

        // 查询
        List<User> users = masterSlaveMapper.listAllMasterSlave();

        return users;
    }
}

@Mapper
public interface MasterSlaveMapper {
    int insertMasterSlave(User user);

    int deleteMasterSlaveById(Long id);

    int updateMasterSlaveById(@Param("id") Long id, @Param("name") String name);

    List<User> listAllMasterSlave();
}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.lhz.sharding.mapper.MasterSlaveMapper">
    <insert id="insertMasterSlave" parameterType="com.lhz.sharding.model.entity.User">
        insert into user(id, name, phone, email)
        values (#{id}, #{name}, #{phone}, #{email})
    </insert>

    <delete id="deleteMasterSlaveById">
        delete
        from user
        where id = #{id}
    </delete>

    <update id="updateMasterSlaveById">
        update
            user
        set `name` = #{name}
        where id = #{id}
    </update>

    <select id="listAllMasterSlave"
            resultType="com.lhz.sharding.model.entity.User">
        select *
        from user
        order by id desc
    </select>
</mapper>