ShardingJdbc实战-ShardingJdbc配置及读写分离

news2024/11/15 23:57:51

文章目录

一、项目搭建
二、测试结果
- 1.访问http://localhost:8085/user/save
- 2.访问http://localhost:8085/user/listuser

一、项目搭建

新建一个Spring Boot工程

在这里插入图片描述

引入依赖-sharding、ssm、数据库驱动

<properties>
        <java.version>1.8</java.version>
        <sharding-sphere.version>4.0.0-RC1</sharding-sphere.version>
    </properties>
    <dependencies>
        <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>
        <!-- 依赖mybatis和mysql驱动 -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.1.4</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </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>
		<!--依赖sharding-->
        <dependency>
            <groupId>org.apache.shardingsphere</groupId>
            <artifactId>sharding-jdbc-spring-boot-starter</artifactId>
            <version>${sharding-sphere.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.shardingsphere</groupId>
            <artifactId>sharding-core-common</artifactId>
            <version>${sharding-sphere.version}</version>
        </dependency>
        <!--依赖数据源druid-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.21</version>
        </dependency>
    </dependencies>

定义配置yml

server:
  port: 8085
spring:
  main:
    allow-bean-definition-overriding: true
  shardingsphere:
    # 参数配置，显示sql
    props:
      sql:
        show: true
    # 配置数据源
    datasource:
      # 给每个数据源取别名，下面的ds1,ds2,ds3任意取名字
      names: ds1,ds2,ds3
      # 给master-ds1每个数据源配置数据库连接信息
      ds1:
        # 配置druid数据源
        type: com.alibaba.druid.pool.DruidDataSource
        driver-class-name: com.mysql.cj.jdbc.Driver
        url: jdbc:mysql://master:port/ksd-sharding-db?useUnicode=true&characterEncoding=utf8&tinyInt1isBit=false&useSSL=false&serverTimezone=GMT
        username: root
        password: 123456
        maxPoolSize: 100
        minPoolSize: 5
      # 配置ds2-slave
      ds2:
        type: com.alibaba.druid.pool.DruidDataSource
        driver-class-name: com.mysql.cj.jdbc.Driver
        url: jdbc:mysql://slave1:port/ksd-sharding-db?useUnicode=true&characterEncoding=utf8&tinyInt1isBit=false&useSSL=false&serverTimezone=GMT
        username: root
        password: 123456
        maxPoolSize: 10
        minPoolSize: 5
      # 配置ds3-slave
      ds3:
        type: com.alibaba.druid.pool.DruidDataSource
        driver-class-name: com.mysql.cj.jdbc.Driver
        url: jdbc:mysql://slave2:port/ksd-sharding-db?useUnicode=true&characterEncoding=utf8&tinyInt1isBit=false&useSSL=false&serverTimezone=GMT
        username: root
        password: 123456
        maxPoolSize: 10
        minPoolSize: 5
    # 配置默认数据源ds1
    sharding:
      # 默认数据源，主要用于写，注意一定要配置读写分离 ,注意：如果不配置，那么就会把三个节点都当做从slave节点，新增，修改和删除会出错。
      default-data-source-name: ds1
    # 配置数据源的读写分离，但是数据库一定要做主从复制
    masterslave:
      # 配置主从名称，可以任意取名字
      name: ms
      # 配置主库master，负责数据的写入
      master-data-source-name: ds1
      # 配置从库slave节点
      slave-data-source-names: ds2,ds3
      # 配置slave节点的负载均衡均衡策略，采用轮询机制
      load-balance-algorithm-type: round_robin
# 整合mybatis的配置XXXXX
mybatis:
  mapper-locations: classpath:mapper/*.xml
  type-aliases-package: com.example.shardingjdbc.sharding.entity

定义mapper，entity，controller

entity

package com.example.shardingjdbc.sharding.entity;

import lombok.Data;

@Data
public class User {

    // 主键
    private Integer id;
    // 昵称
    private String nickname;
    // 密码
    private String password;
    // 性
    private Integer sex;
    // 性
    private String birthday;
}

mapper

package com.example.shardingjdbc.sharding.mapper;

import com.example.shardingjdbc.sharding.entity.User;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;

import java.util.List;

public interface UserMapper {

    /**
     * @description 保存用户
     * @params [user]
     */
    @Insert("insert into ksd_user(id,nickname,password,sex,birthday) values(#{id},#{nickname},#{password},#{sex},#{birthday})")
    void addUser(User user);
    /**
     * @description 查询用户
     * @params [user]
     */
    @Select("select * from ksd_user")
    List<User> findUsers();
}

controller

package com.example.shardingjdbc.sharding.controller;

import com.example.shardingjdbc.sharding.entity.User;
import com.example.shardingjdbc.sharding.mapper.UserMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;
import java.util.Random;

@RestController
@RequestMapping("/user")
public class UserController {

    @Autowired
    private UserMapper userMapper;

    @GetMapping("/save")
    public String insert() {
        User user = new User();
        user.setId(new Random().nextInt());
        user.setNickname("zhangsan");
        user.setPassword("1234567");
        user.setSex(1);
        user.setBirthday("1988-12-03");
        userMapper.addUser(user);
        return "success";
    }
    @GetMapping("/listuser")
    public List<User> listuser() {
        return userMapper.findUsers();
    }
}