Mybatis Plus配置多数据源

在Spring Boot项目中配置MyBatis Plus支持多数据源，你可以通过以下步骤实现：

1. 配置数据源属性
2. 配置数据源
3. 配置SqlSessionFactory
4. 配置事务管理器
5. 配置Mapper扫描

以下是一个简单的示例：

@Configuration
public class DataSourceConfig {
 
    @Bean
    @ConfigurationProperties("spring.datasource.primary")
    public DataSource primaryDataSource() {
        return DataSourceBuilder.create().build();
    }
 
    @Bean
    @ConfigurationProperties("spring.datasource.secondary")
    public DataSource secondaryDataSource() {
        return DataSourceBuilder.create().build();
    }
 
    @Bean
    public SqlSessionFactory sqlSessionFactoryPrimary() throws Exception {
        SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();
        factoryBean.setDataSource(primaryDataSource());
        return factoryBean.getObject();
    }
 
    @Bean
    public SqlSessionFactory sqlSessionFactorySecondary() throws Exception {
        SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();
        factoryBean.setDataSource(secondaryDataSource());
        return factoryBean.getObject();
    }
 
    @Bean
    public PlatformTransactionManager transactionManagerPrimary(
      @Qualifier("primaryDataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }
 
    @Bean
    public PlatformTransactionManager transactionManagerSecondary(
      @Qualifier("secondaryDataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }
}

在上述配置中，我们定义了两个数据源primaryDataSource和secondaryDataSource，并为每个数据源创建了对应的SqlSessionFactory和PlatformTransactionManager。

确保在application.properties或application.yml中正确配置了数据源属性，例如：

spring:
  datasource:
    primary:
      url: jdbc:mysql://localhost:3306/primary_db
      username: user
      password: pass
    secondary:
      url: jdbc:mysql://localhost:3306/secondary_db
      username: user
      password: pass

对于Mapper接口，你需要为每个数据源指定对应的SqlSessionFac