How to realize the usage of connecting multiple databases in idel

The only data connected to my project is the local database , How to connect two databases , The primary database is a local database , The secondary database is 192.168.1.123 The database above , When I log in, I access my master database , When I query, the data may be obtained from my secondary database

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Take the answer ：

Set master-slave Library

** establish DataSourceConfig **

@Configurationpublic class DataSourceConfig {    @Bean(name = "dbOneDataSource")    @Primary    // application.yml  In the corresponding db Corresponding to the company's own air grid system database     @ConfigurationProperties(prefix = "spring.db1")    public DataSource dbOneDataSource() {        return DataSourceBuilder.create().build();    }    @Bean(name = "dbTwoDataSource")    // application.yml  Corresponding database in 1    @ConfigurationProperties(prefix = "spring.db2")    public DataSource dbTwoDataSource() {        return DataSourceBuilder.create().build();    }    //@Bean(name = "dbThreeDataSource")    // application.yml  In the corresponding   database 2    //@ConfigurationProperties(prefix = "spring.db3")    /*public DataSource dbThreeDataSource() { return DataSourceBuilder.create().build(); }*/}

To write MybatisConfig

```java /** *  The first database  SqlSessionFactory && SqlSessionTemplate  establish  */    @Configuration    // Corresponding to the binding data source mapper[ First use ]    @MapperScan(basePackages = {
   
   
   
   "com.hqkj.httpdemo.demo.one.mapper"},            sqlSessionFactoryRef = "sqlSessionFactoryOne",            sqlSessionTemplateRef = "sqlSessionTemplateOne")    public static  class DBOne{        @Resource        DataSource dbOneDataSource;        @Bean        @Primary        public SqlSessionFactory sqlSessionFactoryOne() throws Exception {            SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();            factoryBean.setDataSource(dbOneDataSource);            return factoryBean.getObject();        }        @Bean        @Primary        public SqlSessionTemplate sqlSessionTemplateOne() throws Exception {            SqlSessionTemplate template = new SqlSessionTemplate(sqlSessionFactoryOne());            return template;        }    }

```java/** *  The second database  SqlSessionFactory && SqlSessionTemplate  establish  */    @Configuration    // Corresponding to the original data binding maper[ Second use ]    @MapperScan(basePackages = {
   
   
   
   "com.hqkj.httpdemo.demo.two.mapper"},            sqlSessionFactoryRef = "sqlSessionFactoryTwo",            sqlSessionTemplateRef ="sqlSessionTemplateTwo" )    public static class DBTwo{        @Resource        DataSource dbTwoDataSource;        @Bean        public SqlSessionFactory sqlSessionFactoryTwo() throws Exception {            SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();            factoryBean.setDataSource(dbTwoDataSource);            return factoryBean.getObject();        }        @Bean        public SqlSessionTemplate sqlSessionTemplateTwo() throws Exception {            SqlSessionTemplate template = new SqlSessionTemplate(sqlSessionFactoryTwo());            return template;        }    }

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