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SpringBoot2.0.3.RELEASE+sharding-jdbc4.1.0+mybatis-plus3.4.1+druid1.1.22 快速搭建分库分表

作者:互联网

文末有demo的git地址

Apache ShardingSphere 是一套开源的分布式数据库解决方案组成的生态圈,它由 JDBC、Proxy 和 Sidecar(规划中)这 3 款既能够独立部署,又支持混合部署配合使用的产品组成。

目前,数据分片、读写分离、数据加密、影子库压测等功能,以及对 MySQL、PostgreSQL、SQLServer、Oracle 等 SQL 与协议的支持,均通过插件的方式织入项目。

ShardingSphere-JDBC

定位为轻量级 Java 框架,在 Java 的 JDBC 层提供的额外服务。 它使用客户端直连数据库,以 jar 包形式提供服务,无需额外部署和依赖,可理解为增强版的 JDBC 驱动,完全兼容 JDBC 和各种 ORM 框架。

ShardingSphere-Proxy

定位为透明化的数据库代理端,提供封装了数据库二进制协议的服务端版本,用于完成对异构语言的支持。 目前提供 MySQL 和 PostgreSQL 版本,它可以使用任何兼容 MySQL/PostgreSQL 协议的访问客户端(如:MySQL Command Client, MySQL Workbench, Navicat 等)操作数据,对 DBA 更加友好。

本次我们主要使用SHardingJDBC进行分库分表

首先创建数据库

    

其中t_order是订单表,t_order_item订单商品信息表,t_config广播表,ds_user.t_user专库专表。也就是ShardingJDBC不仅可以配置分库分表,还可以配置单独的数据库使用

脚本已经放入git项目中

 导入依赖

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- mysql -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.alibaba/druid-spring-boot-starter -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.22</version>
        </dependency>
        <!-- lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <!-- mybatis plus 代码生成器 -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.1.3</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.4.1</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>3.4.1</version>
        </dependency>
        <dependency>
            <groupId>org.freemarker</groupId>
            <artifactId>freemarker</artifactId>
            <version>2.3.28</version>
        </dependency>
        <!-- fastjson -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.47</version>
        </dependency>
        <!-- ShardingSphere -->
        <dependency>
            <groupId>org.apache.shardingsphere</groupId>
            <artifactId>sharding-jdbc-spring-boot-starter</artifactId>
            <version>4.1.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.shardingsphere</groupId>
            <artifactId>sharding-core-common</artifactId>
            <version>4.1.0</version>
        </dependency>
        <!-- commons-lang3 -->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.10</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/cn.hutool/hutool-all -->
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.5.8</version>
        </dependency>

然后通过代码自动生成controller,service,repository代码

package com.qjc.config;

import com.baomidou.mybatisplus.core.exceptions.MybatisPlusException;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.config.*;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import com.baomidou.mybatisplus.generator.engine.FreemarkerTemplateEngine;

import java.util.Scanner;

/**
 * @ClassName: GeneratorCodeConfig
 * @Description: 自动生成mybatisplus的相关代码
 * @Author: qiaojiacheng
 * @Date: 2021/3/23 6:32 下午
 */
public class GeneratorCodeConfig {

    public static String scanner(String tip) {
        Scanner scanner = new Scanner(System.in);
        StringBuilder help = new StringBuilder();
        help.append("请输入" + tip + ":");
        System.out.println(help.toString());
        if (scanner.hasNext()) {
            String ipt = scanner.next();
            if (!StringUtils.isBlank(ipt)) {
                return ipt;
            }
        }
        throw new MybatisPlusException("请输入正确的" + tip + "!");
    }

    public static void main(String[] args) {
        // 代码生成器
        AutoGenerator mpg = new AutoGenerator();

        // 全局配置
        GlobalConfig gc = new GlobalConfig();
        String projectPath = System.getProperty("user.dir");
        gc.setOutputDir(projectPath + "/src/main/java");
        gc.setAuthor("astupidcoder");
        gc.setOpen(false);
        //实体属性 Swagger2 注解
        gc.setSwagger2(false);
        mpg.setGlobalConfig(gc);

        // 数据源配置
        DataSourceConfig dsc = new DataSourceConfig();
        dsc.setUrl("jdbc:mysql://127.0.0.1:3306/test?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&useSSL=false&allowPublicKeyRetrieval=true");
        dsc.setDriverName("com.mysql.jdbc.Driver");
        dsc.setUsername("root");
        dsc.setPassword("123456");
        mpg.setDataSource(dsc);

        // 包配置
        PackageConfig pc = new PackageConfig();
//        pc.setModuleName(scanner("模块名"));
        pc.setParent("com.qjc");
        pc.setEntity("entity");
        pc.setMapper("mapper");
        pc.setService("service");
        pc.setServiceImpl("service.impl");
        mpg.setPackageInfo(pc);// 配置模板
        TemplateConfig templateConfig = new TemplateConfig();

        // 配置自定义输出模板
        //指定自定义模板路径,注意不要带上.ftl/.vm, 会根据使用的模板引擎自动识别
        // templateConfig.setEntity("templates/entity2.java");
        // templateConfig.setService();
        // templateConfig.setController();

        templateConfig.setXml(null);
        mpg.setTemplate(templateConfig);

        // 策略配置
        StrategyConfig strategy = new StrategyConfig();
        strategy.setNaming(NamingStrategy.underline_to_camel);
        strategy.setColumnNaming(NamingStrategy.underline_to_camel);
        strategy.setSuperEntityClass("com.baomidou.mybatisplus.extension.activerecord.Model");
        strategy.setEntityLombokModel(true);
        strategy.setRestControllerStyle(true);

        strategy.setEntityLombokModel(true);
        // 公共父类
//        strategy.setSuperControllerClass("com.baomidou.ant.common.BaseController");
        // 写于父类中的公共字段
//        strategy.setSuperEntityColumns("id");
        strategy.setInclude(scanner("表名,多个英文逗号分割").split(","));
        strategy.setControllerMappingHyphenStyle(true);
        strategy.setTablePrefix(pc.getModuleName() + "_");
        mpg.setStrategy(strategy);
        mpg.setTemplateEngine(new FreemarkerTemplateEngine());
        mpg.execute();
    }
}

最后就是最主要的配置了,ShardingSphere-JDBC 可以通过 JavaYAMLSpring 命名空间和 Spring Boot Starter 这 4 种方式进行配置,我们使用Spring Boot Starter,也就是配置文件properties进行配置

server.port=8081
server.servlet.context-path=/

spring.jackson.date-format=yyyy-MM-dd HH:mm:ss
spring.jackson.time-zone=GMT+8
spring.jackson.serialization.write-dates-as-timestamps=false

spring.main.allow-bean-definition-overriding=true
# 命名数据源  这个是自定义的
spring.shardingsphere.datasource.names=ds-0,ds-1,ds-2
# 配置数据源ds-0
spring.shardingsphere.datasource.ds-0.type=com.alibaba.druid.pool.DruidDataSource
spring.shardingsphere.datasource.ds-0.driverClassName=com.mysql.jdbc.Driver
spring.shardingsphere.datasource.ds-0.url=jdbc:mysql://127.0.0.1:3306/ds-0?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&useSSL=false&allowPublicKeyRetrieval=true
spring.shardingsphere.datasource.ds-0.username=root
spring.shardingsphere.datasource.ds-0.password=123456
# 配置数据源ds-1
spring.shardingsphere.datasource.ds-1.type=com.alibaba.druid.pool.DruidDataSource
spring.shardingsphere.datasource.ds-1.driverClassName=com.mysql.jdbc.Driver
spring.shardingsphere.datasource.ds-1.url=jdbc:mysql://127.0.0.1:3306/ds-1?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&useSSL=false&allowPublicKeyRetrieval=true
spring.shardingsphere.datasource.ds-1.username=root
spring.shardingsphere.datasource.ds-1.password=123456
# 配置数据源ds-2
spring.shardingsphere.datasource.ds-2.type=com.alibaba.druid.pool.DruidDataSource
spring.shardingsphere.datasource.ds-2.driverClassName=com.mysql.jdbc.Driver
spring.shardingsphere.datasource.ds-2.url=jdbc:mysql://127.0.0.1:3306/ds-user?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&useSSL=false&allowPublicKeyRetrieval=true
spring.shardingsphere.datasource.ds-2.username=root
spring.shardingsphere.datasource.ds-2.password=123456
# 配置默认数据源ds-0
spring.shardingsphere.sharding.default-data-source-name=ds-0

# 配置分片表 t_order
# 配置真实数据节点  库:ds-0,ds-1;表:t_order_0,t_order_1,t_order_2
spring.shardingsphere.sharding.tables.t_order.actual-data-nodes=ds-$->{0..1}.t_order_$->{0..2}
# 分库分片建
spring.shardingsphere.sharding.tables.t_order.database-strategy.inline.sharding-column=order_id
# 分库分片算法: 对order_id字段进行取模分库,2代表分片库的个数
spring.shardingsphere.sharding.tables.t_order.database-strategy.inline.algorithm-expression=ds-$->{order_id % 2}
# 分表分片健
spring.shardingsphere.sharding.tables.t_order.table-strategy.inline.sharding-column=order_id
# 分表算法:对order_id字段进行取模分库,3代表分片表的个数
spring.shardingsphere.sharding.tables.t_order.table-strategy.inline.algorithm-expression=t_order_$->{order_id % 3}
# 配置自增主键字段
spring.shardingsphere.sharding.tables.t_order.key-generator.column=order_id
# 自增主键ID 生成方案:雪花算法
spring.shardingsphere.sharding.tables.t_order.key-generator.type=SNOWFLAKE

# 配置分片表 t_order_item
spring.shardingsphere.sharding.tables.t_order_item.actual-data-nodes=ds-$->{0..1}.t_order_item_$->{0..2}
spring.shardingsphere.sharding.tables.t_order_item.database-strategy.inline.sharding-column=order_id
spring.shardingsphere.sharding.tables.t_order_item.database-strategy.inline.algorithm-expression=ds-$->{order_id % 2}
spring.shardingsphere.sharding.tables.t_order_item.table-strategy.inline.sharding-column=order_id
spring.shardingsphere.sharding.tables.t_order_item.table-strategy.inline.algorithm-expression=t_order_item_$->{order_id % 3}

#配置专库专表
spring.shardingsphere.sharding.tables.t_user.actual-data-nodes=ds-2.t_user
spring.shardingsphere.sharding.tables.t_user.database-strategy.inline.sharding-column=id
spring.shardingsphere.sharding.tables.t_user.database-strategy.inline.algorithm-expression=ds-2
spring.shardingsphere.sharding.tables.t_user.table-strategy.inline.sharding-column=id
spring.shardingsphere.sharding.tables.t_user.table-strategy.inline.algorithm-expression=t_user
spring.shardingsphere.sharding.tables.t_user.key-generator.column=id
spring.shardingsphere.sharding.tables.t_user.key-generator.type=SNOWFLAKE

# 绑定表关系  不加[0]查询时会导致笛卡尔积
spring.shardingsphere.sharding.binding-tables[0]=t_order,t_order_item
# 配置广播表=公共表(PS:所有数据库中都必须有这张表)
spring.shardingsphere.sharding.broadcast-tables=t_config
# 开启SQL解析日志
spring.shardingsphere.props.sql.show=true

# 配置mybatis-plus
mybatis-plus.configuration.map-underscore-to-camel-case=true
mybatis-plus.configuration.auto-mapping-behavior=full
mybatis-plus.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl
mybatis-plus.mapper-locations=classpath*:mapper/**/*Mapper.xml
mybatis-plus.global-config.db-config.logic-not-delete-value=0
mybatis-plus.global-config.db-config.logic-delete-value=1
mybatis-plus.global-config.db-config.logic-delete-field=deleted

进行测试

package com.qjc;

import com.alibaba.fastjson.JSON;
import com.qjc.entity.TConfig;
import com.qjc.entity.TOrder;
import com.qjc.entity.TOrderItem;
import com.qjc.entity.TUser;
import com.qjc.mapper.TConfigMapper;
import com.qjc.mapper.TOrderItemMapper;
import com.qjc.mapper.TOrderMapper;
import com.qjc.mapper.TUserMapper;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import java.math.BigDecimal;
import java.util.List;

@RunWith(SpringRunner.class)
@SpringBootTest
public class ShardingSphereDemoTest {

    @Autowired
    private TOrderMapper orderMapper;
    @Autowired
    private TOrderItemMapper orderItemMapper;
    @Autowired
    private TUserMapper userMapper;
    @Autowired
    private TConfigMapper configMapper;

    private static final Integer num = 1000;
    private static final String orderNoPre = "NO-";

    /**
     * 测试分库分表-插入
     */
    @Test
    public void testOrderSave() {
        for (int i = 1; i <= num; i++) {
            String orderNo = orderNoPre + String.format("%04d", i);
            TOrder order = new TOrder();
            order.setOrderNo(orderNo);
            order.setCreateName("订单名称" + i);
            order.setPrice(new BigDecimal("" + i));
            orderMapper.insert(order);

            TOrderItem orderItem = new TOrderItem();
            Long orderId = order.getOrderId();
            orderItem.setOrderId(orderId);
            orderItem.setOrderNo(orderNo);
            orderItem.setItemName("商品名称" + i);
            orderItem.setItemDesc("商品描述" + i);
            orderItemMapper.insert(orderItem);
        }
    }

    /**
     * 测试分库分表-查询
     */
    @Test
    public void testOrderQuery() {
        List<TOrder> orderListByPage = orderMapper.findOrderListByPage();
        System.err.println(JSON.toJSONString(orderListByPage));
    }

    /**
     * 测试专库专表
     */
    @Test
    public void test() {
//        TUser user = new TUser();
//        user.setName("用户");
//        user.setAge(18);
//        user.setAddress("地址");
//        userMapper.insert(user);
        TUser user1 = userMapper.selectById(1376363351721992194L);
        System.err.println(user1);
    }

    /**
     * 测试公共表
     */
    @Test
    public void testConfig() {
        TConfig config = new TConfig();
        config.setRemark("bbbb");
        configMapper.insert(config);
    }

}

通过数据库中的数据就可以查看是否成功,首先插入1000条数据,t_order和t_order_item的三张表加起来肯定是1000,而且由于t_order和t_order_item是绑定关系,所以他们后缀相同的表,里面的数据条数以及分库分片键都是对应的

代码地址:https://gitee.com/xiaorenwu_dashije/sharding-sphere-demo.git

 

标签:分库,SpringBoot2.0,druid1.1,spring,ds,shardingsphere,sharding,com,order
来源: https://www.cnblogs.com/java-spring/p/14646961.html