最新MySql8.27主从复制及SpringBoot项目中的读写分离实战教程

[mysqld]
log-bin=mysql-bin # [必须]启用二进制日志
server-id=100 # [必须]服务器唯一ID

create user ‘slave’@’%’ IDENTIFIED WITH mysql_native_password BY ‘123456’;
grant replication slave on *.* to ‘slave’@’%’;

show master status

[mysqld]
server-id=101 # [必须]服务器唯一ID

systemctl restart mysql;

change master to master_host=’主库IP地址’,master_user=’slave’,master_password=’123456′,master_log_file=’mysql-bin.000001′,master_log_pos=653;
stop slave;
start slave;

show slave status;

<dependency>
<groupId>org.apache.shardingsphere</groupId>
<artifactId>sharding-jdbc-spring-boot-starter</artifactId>
<version>4.1.1</version>
</dependency>

package com.zcl.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.zcl.entity.User;
import com.zcl.service.UserService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import javax.sql.DataSource;
import java.util.List;

/**
* 项目名称：Sharding-JDBC
* 描述：控制器
*
* @author zhong
* @date 2022-08-06 20:36
*/
@Slf4j
@RestController
@RequestMapping(“/user”)
public class UserController {
@Autowired
private DataSource dataSource;

@Autowired
private UserService userService;

/**
* 新增用户
* @param user
* @return
*/
@PostMapping
public User save(User user){
userService.save(user);
return user;
}

/**
* 根据id删除
* @param id
*/
@DeleteMapping(“/{id}”)
public void delete(@PathVariable(“id”) Long id){
userService.removeById(id);
}

/**
* 根据id修改用户
* @param user
* @return
*/
@PutMapping
public User update(User user){
userService.updateById(user);
return user;
}

/**
* 根据id查询用户
* @param id
* @return
*/
@GetMapping(“/{id}”)
public User getById(@PathVariable(“id”) Long id){
return userService.getById(id);
}

/**
* 条件查询
* @param user
* @return
*/
@GetMapping(“/list”)
public List<User> list(User user){
LambdaQueryWrapper<User> queryWrapper = new LambdaQueryWrapper<>();
queryWrapper.eq(user.getId() != null,User::getId,user.getId());
queryWrapper.eq(user.getName() != null, User::getName,user.getName());
return userService.list(queryWrapper);
}
}

server:
port: 8080
mybatis-plus:
configuration:
log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
map-underscore-to-camel-case: true
global-config:
db-config:
id-type: ASSIGN_ID

spring:
shardingsphere:
datasource:
names: master,slave
# 主数据源
master:
type: com.alibaba.druid.pool.DruidDataSource
url: jdbc:mysql://192.168.26.131:3306/rw?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&useSSL=false&allowPublicKeyRetrieval=true
driver-class-name: com.mysql.cj.jdbc.Driver
username: root
password: 1234
# 从数据源
slave:
type: com.alibaba.druid.pool.DruidDataSource
url: jdbc:mysql://192.168.26.131:13306/rw?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&useSSL=false&allowPublicKeyRetrieval=true
driver-class-name: com.mysql.cj.jdbc.Driver
username: root
password: 1234
masterslave:
# 读写分离设置【负载均衡策略】
load-balance-algorithm-type: round_robin
# 最终的数据源名称
name: dataSource
# 主数据源名称【与上面对应】
master-data-source-name: master
# 从数据源名称【与上面对应】
slave-data-source-names: slave
props:
sql:
show: true # 开启SQL显示，默认false
main:
allow-bean-definition-overriding: true # 允许bean覆盖