Sharding-Jdbc实现读写分离
Hello，兄弟们好，我是Feri，最近整理了最新的基于Seata-Server2.0实现分布式事务的demo，希望对你有所帮助，有任何问题，可以随时沟通交流，在成为技术大牛的路上，我们一路前行!
之前的一篇文章，实现了Mysql的主从复制，那么本篇就接着上次搭建Mysql的主从复制，咱们使用Sharding-Jdbc实现一下读写分离，来提升Mysql访问的瓶颈，来，手把手带你飞！
之前搭建的4台Mysql服务器
基于Sharding-Jdbc实现Mysql集群下的读写分离操作步骤：
1.准备数据库和表
-- 在主库 创建数据库，在从库观察 是否会同步
create database db_test01;
create table db_test01.t_msg(
id int primary key auto_increment,
title varchar(20),
info varchar(100),
ctime datetime
);
1.创建SpringBoot项目并依赖jar
<dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId></dependency><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.2.22</version></dependency><dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-boot-starter</artifactId><version>3.5.3.1</version></dependency><dependency><groupId>com.github.xiaoymin</groupId><artifactId>knife4j-openapi3-spring-boot-starter</artifactId><version>4.4.0</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><dependency><groupId>org.apache.shardingsphere</groupId><artifactId>sharding-jdbc-spring-boot-starter</artifactId><version>4.1.1</version></dependency></dependencies>
2.实现t_msg表的CRUD操作
3.在application.yaml实现配置
spring:shardingsphere:props:sql: #打印代理的sql语句show: truedatasource: #配置对应的数据源names: dbmaster,dbslaver1,dbslaver2,dbslaver3dbmaster:driver-class-name: com.mysql.cj.jdbc.Drivertype: com.alibaba.druid.pool.DruidDataSourceurl: jdbc:mysql://127.0.0.1:3310/db_test01username: rootpassword: 123456dbslaver1:driver-class-name: com.mysql.cj.jdbc.Drivertype: com.alibaba.druid.pool.DruidDataSourceurl: jdbc:mysql://127.0.0.1:3312/db_test01username: rootpassword: 123456dbslaver2:driver-class-name: com.mysql.cj.jdbc.Drivertype: com.alibaba.druid.pool.DruidDataSourceurl: jdbc:mysql://127.0.0.1:3313/db_test01username: rootpassword: 123456dbslaver3:driver-class-name: com.mysql.cj.jdbc.Drivertype: com.alibaba.druid.pool.DruidDataSourceurl: jdbc:mysql://127.0.0.1:3314/db_test01username: rootpassword: 123456masterslave: #主从复制的配置，配置读写分离name: msmaster-data-source-name: dbmaster #设置主库，写库slave-data-source-names: dbslaver1,dbslaver2,dbslaver3 #设置从库，读库load-balance-algorithm-type: round_robin #设置从库的负载均衡策略，支持2种：1.轮询 2.随机 randommybatis-plus:configuration:log-impl: org.apache.ibatis.logging.stdout.StdOutImpl4.运行测试
测试新增接口和查询接口，观察后台运行日志
这样就可以啦，希望对你能有所帮助哈，少走弯路，就关注我！
