java

关注公众号 jb51net

关闭
首页 > 软件编程 > java > SpringBoot Mybatis-plus shardingsphere分库分表

SpringBoot+Mybatis-plus+shardingsphere实现分库分表的方案

作者：烟火缠过客

实现亿级数据量分库分表的项目是一个挑战性很高的任务,下面是一个基于Spring Boot的简单实现方案,感兴趣的朋友一起看看吧

SpringBoot+Mybatis-plus+shardingsphere实现分库分表

介绍

实现亿级数据量分库分表的项目是一个挑战性很高的任务，下面是一个基于Spring Boot的简单实现方案：

监控与调优：实时监控数据库的性能指标，及时调整分片策略和数据库配置，保证系统的稳定性和性能。

引入依赖

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.28</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.4.3</version>
        </dependency>
        <!--分库分表-->
        <!-- Sharding-JDBC -->
        <dependency>
            <groupId>org.apache.shardingsphere</groupId>
            <artifactId>shardingsphere-jdbc-core-spring-boot-starter</artifactId>
            <version>5.2.0</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

yaml配置

server:
  port: 10086
spring:
  shardingsphere:
    # 数据源配置
    datasource:
      # 数据源名称，多数据源以逗号分隔
      names: db0,db1
      db0:
        type: com.zaxxer.hikari.HikariDataSource
        driver-class-name: com.mysql.cj.jdbc.Driver
        jdbc-url: jdbc:mysql://127.0.0.1:3306/ds0?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=Asia/Shanghai&allowPublicKeyRetrieval=true
        username: root
        password: root
      db1:
        type: com.zaxxer.hikari.HikariDataSource
        driver-class-name: com.mysql.cj.jdbc.Driver
        jdbc-url: jdbc:mysql://127.0.0.1:3306/ds1?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=Asia/Shanghai&allowPublicKeyRetrieval=true
        username: root
        password: root
    # 分片规则配置
    rules:
      sharding:
        # 分片算法配置
        sharding-algorithms:
          database-inline:
            # 分片算法类型
            type: INLINE
            props:
              # 分片算法的行表达式（算法自行定义，此处为方便演示效果）
              algorithm-expression: db$->{age % 2}
          table-inline:
            # 分片算法类型
            type: INLINE
            props:
              # 分片算法的行表达式
              algorithm-expression: user_$->{age % 3}
        tables:
          # 逻辑表名称
          user:
            # 行表达式标识符可以使用 ${...} 或 $->{...}，但前者与 Spring 本身的属性文件占位符冲突，因此在 Spring 环境中使用行表达式标识符建议使用 $->{...}
            actual-data-nodes: db${0..1}.user_${0..2}
            # 分库策略
            database-strategy:
              standard:
                # 分片列名称
                sharding-column: age
                # 分片算法名称
                sharding-algorithm-name: database-inline
            # 分表策略
            table-strategy:
              standard:
                # 分片列名称
                sharding-column: age
                # 分片算法名称
                sharding-algorithm-name: table-inline
    # 属性配置
    props:
      # 展示修改以后的sql语句
      sql-show: true

DDL准备

数据库ds0

-- ds0.user_0 definition
CREATE TABLE `user_0` (
  `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
  `name` varchar(32) NOT NULL COMMENT '姓名',
  `age` int NOT NULL COMMENT '年龄',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB COMMENT='用户表';
-- ds0.user_1 definition
CREATE TABLE `user_1` (
  `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
  `name` varchar(32) NOT NULL COMMENT '姓名',
  `age` int NOT NULL COMMENT '年龄',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB COMMENT='用户表';
-- ds0.user_2 definition
CREATE TABLE `user_2` (
  `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
  `name` varchar(32) NOT NULL COMMENT '姓名',
  `age` int NOT NULL COMMENT '年龄',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB COMMENT='用户表';

数据库ds1

-- ds1.user_0 definition
CREATE TABLE `user_0` (
  `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
  `name` varchar(32) NOT NULL COMMENT '姓名',
  `age` int NOT NULL COMMENT '年龄',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB COMMENT='用户表';
-- ds1.user_1 definition
CREATE TABLE `user_1` (
  `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
  `name` varchar(32) NOT NULL COMMENT '姓名',
  `age` int NOT NULL COMMENT '年龄',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB COMMENT='用户表';
-- ds1.user_2 definition
CREATE TABLE `user_2` (
  `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
  `name` varchar(32) NOT NULL COMMENT '姓名',
  `age` int NOT NULL COMMENT '年龄',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB COMMENT='用户表';

entity

package com.kang.sharding.entity;
import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableName;
import lombok.Data;
@Data
@TableName("user")  
public class User {
    @TableId(value = "id",type = IdType.AUTO)
    private Long id;
    private String name;
    private Integer age;
    // getter, setter, toString...  
}

cotroller

package com.kang.sharding.controller;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.kang.sharding.entity.User;
import com.kang.sharding.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import java.util.List;
@RestController  
@RequestMapping("/user")  
public class UserController {  
    @Autowired  
    private UserService userService;
    @PostMapping ("add")
    public boolean createUser(@RequestBody User user) {
        return userService.save(user);  
    }
    @PostMapping ("update")
    public boolean updateByAge(@RequestBody User user){
        LambdaUpdateWrapper<User> updateWrapper = new LambdaUpdateWrapper<>();
        // 分片数据不允许更新,否则会报错
        updateWrapper.eq(User::getAge,user.getAge()).set(User::getName,user.getName());
        return userService.update(updateWrapper);
    }
    @GetMapping ("delete")
    public boolean deleteUserByAge(@RequestParam("age") Integer age) {
        LambdaQueryWrapper<User> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(User::getAge,age);
        return userService.remove(queryWrapper);
    }
    @GetMapping("/{age}")
    public List<User> getUserByAge(@PathVariable Integer age) {
        LambdaQueryWrapper<User> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(User::getAge,age);
        return userService.list(queryWrapper);
    }  
    // 其他方法...  
}

service

package com.kang.sharding.service;
import com.kang.sharding.entity.User;
import com.kang.sharding.mapper.UserMapper;
import org.springframework.stereotype.Service;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;  
@Service  
public class UserService extends ServiceImpl<UserMapper, User> {
}

Mapper

package com.kang.sharding.mapper;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.kang.sharding.entity.User;
import org.apache.ibatis.annotations.Mapper;
@Mapper
public interface UserMapper extends BaseMapper<User> {
}

启动类

package com.kang.sharding;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class ShardingJdbcProjectApplication {
    public static void main(String[] args) {
        SpringApplication.run(ShardingJdbcProjectApplication.class, args);
    }
}

测试

添加

修改

查询

删除

在这里插入图片描述

总结

这只是个简单的入门示例,后续深入研究

到此这篇关于SpringBoot+Mybatis-plus+shardingsphere实现分库分表的文章就介绍到这了,更多相关SpringBoot Mybatis-plus shardingsphere分库分表内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！

您可能感兴趣的文章:
阅读全文