Spring boot + mybatis plus 多数据源

有参照链接：SpringBoot配置多数据源的一款框架(dynamic-datasource-spring-boot-starter) - 编程宝库

场景：A公司为总公司，B公司为分公司，B公司上传的数据需要保存到A公司中。

application.yml的配置

java 复制代码

spring:
  datasource:
    dynamic:
      primary: mysql1
      strict: false
      datasource:
        mysql1:
          driver-class-name: com.mysql.cj.jdbc.Driver
          url: jdbc:mysql://127.0.0.1:3306/bn?useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai&useSSL=false&allowMultiQueries=true
          username: root
          password: mima123
          type: com.alibaba.druid.pool.DruidDataSource
          druid:
            initial-size: 5
            min-idle: 5
            max-active: 20
            max-wait: 60000
            time-between-eviction-runs-millis: 60000
            min-evictable-idle-time-millis: 300000
            validation-query: SELECT 1 FROM DUAL
            test-while-idle: true
            test-on-borrow: false
            test-on-return: false
        mysql2:
          driver-class-name: com.mysql.cj.jdbc.Driver
          url: jdbc:mysql://127.0.0.1:3306/bn_1?useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai&useSSL=false&allowMultiQueries=true
          username: root
          password: mima123
          type: com.alibaba.druid.pool.DruidDataSource
          druid:
            initial-size: 5
            min-idle: 5
            max-active: 20
            max-wait: 60000
            time-between-eviction-runs-millis: 60000
            min-evictable-idle-time-millis: 300000
            validation-query: SELECT 1 FROM DUAL
            test-while-idle: true
            test-on-borrow: false
            test-on-return: false

serviceImpl业务代码

java 复制代码

    @Override
    public List<BnUser> getBnUser1() {
        QueryWrapper<BnUser> b = new QueryWrapper<>();
        b.eq("user_name","common");
        List<BnUser> bnUser = bnUserMapper.selectList(b);
        if (bnUser != null){
            return bnUser;
        }
        return null;
    }

    //@DS("mysql2")
    @Override
    public List<BnUser> getBnUser2() {
        QueryWrapper<BnUser> b = new QueryWrapper<>();
        b.eq("user_name","common1");
        List<BnUser> bnUser = bnUserMapper.selectList(b);
        if (bnUser != null){
            return bnUser;
        }
        return null;
    }

controller的结果

java 复制代码

    @GetMapping("testMoreData")
    public void testMoreData(){
        List<BnUser> bnUser1 = bnUserService.getBnUser1();
        System.out.println("bnuser1 ===== "+bnUser1);

        List<BnUser> bnUser21 = bnUserService.getBnUser2();
        System.out.println("bnuser2 ====== "+bnUser21);


        /*DynamicDataSourceContextHolder.push("mysql1");
        List<BnUser> users = bnUserService.getBnUser1();
        DynamicDataSourceContextHolder.poll();
        //这里切换了数据源
        DynamicDataSourceContextHolder.push("mysql2");
        List<BnUser> bnUser2 = bnUserService.getBnUser2();
        DynamicDataSourceContextHolder.poll();
        System.out.println(users + "=====" + bnUser2);*/
    }

显示结果：

serviceImpl文件并未打开 @DS -> bnuser1 有数据(mysql1)；bnuser2 没有数据。
serviceImpl文件并未打开 @DS -> controller中的注释打开 -> users 有数据(mysql1)；bnUser2 有数据(mysql2)。
serviceImpl文件打开 @DS -> bnuser1 有数据(mysql1)；bnuser2有数据(mysql2)。