创建分页配置

@Configuration
public class MybatisPlusConfig {
    /**
     * 分页插件
     */
    @Bean
    public PaginationInterceptor paginationInterceptor() {
        return new PaginationInterceptor();
    }


}

在数据源配置类中的SqlSessionFactory手动set进去

@Bean("db1SqlSessionFactory")
public SqlSessionFactory db1SqlSessionFactory(@Qualifier("db1DataSource") DataSource dataSource) throws Exception {
    MybatisSqlSessionFactoryBean bean = new MybatisSqlSessionFactoryBean();
    bean.setDataSource(dataSource);
    // 设置分页配置
    bean.setPlugins(paginationInterceptor);
    bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath*:mapper/db1/*.xml"));
    return bean.getObject();
}

重新启动分页配置就生效了，total值为数总量