SpringBoot整合Mybatis-Plus、Druid配置多数据源

在Spring Boot整合MyBatis-Plus和Druid配置多数据源的过程中，你需要定义多个数据源的配置，并且为每个数据源创建一个DataSource、SqlSessionFactory和MybatisPlusInterceptor实例。以下是一个简化的示例：

@Configuration
public class DataSourceConfig {
 
    @Bean
    @ConfigurationProperties("spring.datasource.druid.first")
    public DataSource firstDataSource() {
        return DruidDataSourceBuilder.create().build();
    }
 
    @Bean
    @ConfigurationProperties("spring.datasource.druid.second")
    public DataSource secondDataSource() {
        return DruidDataSourceBuilder.create().build();
    }
 
    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor() {
        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
        // 配置分页插件
        interceptor.addInnerInterceptor(new PaginationInnerInterceptor());
        return interceptor;
    }
 
    @Bean
    public SqlSessionFactory firstSqlSessionFactory(DataSource firstDataSource, MybatisPlusInterceptor mybatisPlusInterceptor) throws Exception {
        SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setDataSource(firstDataSource);
        sqlSessionFactoryBean.setPlugins(mybatisPlusInterceptor);
        return sqlSessionFactoryBean.getObject();
    }
 
    @Bean
    public SqlSessionFactory secondSqlSessionFactory(DataSource secondDataSource, MybatisPlusInterceptor mybatisPlusInterceptor) throws Exception {
        SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setDataSource(secondDataSource);
        sqlSessionFactoryBean.setPlugins(mybatisPlusInterceptor);
        return sqlSessionFactoryBean.getObject();
    }
}

在上述代码中，我们定义了两个数据源firstDataSource和secondDataSource，并为每个数据源创建了一个SqlSessionFactory实例。同时，我们创建了一个MybatisPlusInterceptor实例，并将其应用到所有的SqlSessionFactory实例中。

确保在application.properties或application.yml中配置了正确的数据源属性，例如：

spring:
  datasource:
    druid:
      first:
        url: jdbc:mysql://localhost:3306/first_db
        username: first_user
        password: first_password
      second:
        url: jdbc:mysql://localhost:3306/second_db
        username: second_user
        pa