普通CRUD后台管理项目的核心包装升级

使用baomidou的DynamicDataSource实现多数据源

1.引入jar包

 <dependency>
     <groupId>com.baomidou</groupId>
     <artifactId>dynamic-datasource-spring-boot-starter</artifactId>
     <version>3.5.0</version>
 </dependency>

2.核心配置文件application.yml中进行数据源的配置：

bash 复制代码

spring:
  datasource:
    dynamic:
      #设置默认的数据源或者数据源组,默认值即为master
      primary: master
      #严格匹配数据源,默认false. true未匹配到指定数据源时抛异常,false使用默认数据源
      strict: false
      datasource:
        master:
          url: jdbc:mysql://127.0.0.1:3306/datasource1?serverTimezone=UTC&useUnicode=true&characterEncoding=UTF8&useSSL=false
          username: root
          password: root
          initial-size: 1
          min-idle: 1
          max-active: 20
          test-on-borrow: true
          driver-class-name: com.mysql.cj.jdbc.Driver
        slave_1:
          url: jdbc:mysql://127.0.0.1:3306/datasource2?serverTimezone=UTC&useUnicode=true&characterEncoding=UTF8&useSSL=false
          username: root
          password: root
          initial-size: 1
          min-idle: 1
          max-active: 20
          test-on-borrow: true
          driver-class-name: com.mysql.cj.jdbc.Driver

3.使用

@DS可以修饰方法或者类

java 复制代码

package com.tuling.dynamic.datasource.service.impl;

import com.baomidou.dynamic.datasource.annotation.DS;
import com.baomidou.dynamic.datasource.annotation.DSTransactional;
import com.tuling.dynamic.datasource.mapper.FriendMapper;
import com.tuling.dynamic.datasource.entity.Friend;
import com.tuling.dynamic.datasource.service.FriendService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class FriendImplService implements FriendService {

    @Autowired
    FriendMapper friendMapper;


    @Override
    @DS("slave_1")  // 从库， 如果按照下划线命名方式配置多个  ， 可以指定前缀即可（组名）
    public List<Friend> list() {
        return friendMapper.list();
    }

    @Override
    @DS("master")
    public void save(Friend friend) {
        friendMapper.save(friend);
    }


//    @DS("master")
//    @DSTransactional
//    public void saveAll(){
//        // 执行多数据源的操作
//    }

}