1 實現(xiàn)垂直分庫，專庫專表

實現(xiàn)目標，用戶查詢用戶信息的時候，只操作user_db中t_user表

2 創(chuàng)建數(shù)據(jù)庫

CREATE SCHEMA `userdb` DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci ;

3 創(chuàng)建數(shù)據(jù)表

CREATE TABLE `userdb`.`t_user` (`user_id` BIGINT NOT NULL,`user_name` VARCHAR(45) NOT NULL,`u_status` VARCHAR(45) NOT NULL,PRIMARY KEY (`user_id`));

4 創(chuàng)建po

package com.ccb.sharding.po;import com.baomidou.mybatisplus.annotation.TableName;@TableName("t_user") public class User {private Long userId;private String userName;private String uStatus;public Long getUserId() {return userId;}public void setUserId(Long userId) {this.userId = userId;}public String getUserName() {return userName;}public void setUserName(String userName) {this.userName = userName;}public String getuStatus() {return uStatus;}public void setuStatus(String uStatus) {this.uStatus = uStatus;}@Overridepublic String toString() {return "User{" +"userId=" + userId +", userName='" + userName + '\'' +", uStatus='" + uStatus + '\'' +'}';} }

5 創(chuàng)建 UserMapper 接口

package com.ccb.sharding.mapper;import com.baomidou.mybatisplus.core.mapper.BaseMapper; import com.ccb.sharding.po.User; import org.springframework.stereotype.Repository;@Repository public interface UserMapper extends BaseMapper<User> {}

6 創(chuàng)建application.properties配置分片策略 專庫專表

# sharding-JDBC分片策略（垂直分庫） # 配置數(shù)據(jù)源，給數(shù)據(jù)源命名 # 垂直分庫，配置數(shù)據(jù)源 spring.shardingsphere.datasource.names=ds0# 配置數(shù)據(jù)源具體內容，連接池、驅動、地址、用戶名和密碼 spring.shardingsphere.datasource.ds0.type=com.alibaba.druid.pool.DruidDataSource spring.shardingsphere.datasource.ds0.driver-class-name=com.mysql.cj.jdbc.Driver spring.shardingsphere.datasource.ds0.url=jdbc:mysql://localhost:3306/userdb?serverTimezone=GMT%2B8 spring.shardingsphere.datasource.ds0.username=root spring.shardingsphere.datasource.ds0.password=chengwen# 一個實體類對應兩張表，覆蓋 spring.main.allow-bean-definition-overriding=true# 配置user_db數(shù)據(jù)庫里面t_user 專庫專表 spring.shardingsphere.sharding.tables.t_user.actual-data-nodes=ds$->{0}.t_user# 配置user_db數(shù)據(jù)庫里面 t_user 表里面主鍵 user_id 生成策略 SNOWFLAKE 雪花算法 spring.shardingsphere.sharding.tables.t_user.key-generator.column=user_id spring.shardingsphere.sharding.tables.t_user.key-generator.type=SNOWFLAKE# 指定表分片策略 約定user_id的值添加到t_user表 spring.shardingsphere.sharding.tables.t_user.table-strategy.inline.sharding-column=user_id spring.shardingsphere.sharding.tables.t_user.table-strategy.inline.algorithm-expression=t_user# 打印sql輸出日志 spring.shardingsphere.props.sql.show=true

7 Test

package com.ccb.sharding;import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper; import com.ccb.sharding.mapper.UserMapper; import com.ccb.sharding.po.User; import org.junit.jupiter.api.Test; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.context.SpringBootTest;@SpringBootTest class ShardingApplicationTests {@AutowiredCourseMapper courseMapper;@AutowiredUserMapper userMapper;// ================= 測試水平分表 ======================@Testpublic void addUser() {User user = new User();user.setUserName("Tom");user.setuStatus("A");userMapper.insert(user);}@Testpublic void getUser(){QueryWrapper queryWrapper = new QueryWrapper();queryWrapper.eq("user_id",482828647158251521L);User cuser = userMapper.selectOne(queryWrapper);System.out.println(cuser);} }

8 Test result

專庫專表 新增
專庫專表 查詢

總結

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