0. 标签顺序 Mybatis核心配置文件中有很多标签,它们谁谁写在前写在后其实是有顺序要求的: 从前到后: properties?,settings?,typeAliases?,typeHandlers?,objectFactory?,objectWrapperFactory?,reflectorFactory?,plugins?,environments?,databaseIdProvider?,mappers? 像properties要在typeAliases之前,typeAliases要