海外网站免费建设黄金软件在线下载

一、前端

1.在<template>中加入导入按钮、导入时的对话框

2.在data中引入参数 

3.在method中引入相关方法

4.从auth微服务中引入getToken方法

二、后台

 1.创建excel文件夹，创建

①excel表格对应的实体类OpenCgDetectorInfoExcel

②调用import所需的设置（工具）OpenCgDetectorInfoImportListener

 2.Excel对应的实体类及工具类内容如下（其中id为雪花id，在Excel模板中并没有出现该字段，由于使用雪花id必须使用Mybatis封装的insert，所以此处需要手动插入雪花id，方法见后面）

/*** Excel导入火焰探头模型实体类*/
@Data
@ColumnWidth(25)
@HeadRowHeight(20)
@ContentRowHeight(18)
public class FireDetectorInfoExcel implements Serializable {private static final long serialVersionUID = 1L;@ColumnWidth(15)@ExcelProperty("id")private Long id;@ColumnWidth(15)@ExcelProperty("项目编号")private String projectId;@ColumnWidth(15)@ExcelProperty("探头库类型")private Integer belongType;@ColumnWidth(15)@ExcelProperty("探头名称")private String probeName;@ColumnWidth(15)@ExcelProperty("探头描述")private String probeDescribe;@ColumnWidth(15)@ExcelProperty("品牌")private String probeBrand;@ColumnWidth(15)@ExcelProperty("型号")private String probModel;@ColumnWidth(15)@ExcelProperty("最大距离")private Double maxDistance;@ColumnWidth(15)@ExcelProperty("边缘效率")private Double edgeEffect;@ColumnWidth(15)@ExcelProperty("上仰角度")private Double upAngle;@ColumnWidth(15)@ExcelProperty("上仰满量程角度")private Double upFullAngle;@ColumnWidth(15)@ExcelProperty("俯视角度")private Double downAngle;@ColumnWidth(15)@ExcelProperty("俯视满量程角度")private Double downFullAngle;@ColumnWidth(15)@ExcelProperty("水平角度")private Double levelAngle;@ColumnWidth(15)@ExcelProperty("水平满量程角度")private Double levelFullAngle;
}

@Data
@RequiredArgsConstructor
@EqualsAndHashCode(callSuper = true)
public class OpenCgDetectorInfoImportListener extends AnalysisEventListener<OpenCgDetectorInfoExcel> {/*** 默认每隔3000条存储数据库*/private int batchCount = 3000;/*** 缓存的数据列表*/private List<OpenCgDetectorInfoExcel> list = new ArrayList<>();/*** 用户service*/private final IOpenCgDetectorInfoService openCgDetectorInfoService;@Overridepublic void invoke(OpenCgDetectorInfoExcel data, AnalysisContext context) {list.add(data);// 达到BATCH_COUNT，则调用importer方法入库，防止数据几万条数据在内存，容易OOMif (list.size() >= batchCount) {// 调用importer方法openCgDetectorInfoService.importOpenCgDetectorInfo(list);// 存储完成清理listlist.clear();}}@Overridepublic void doAfterAllAnalysed(AnalysisContext analysisContext) {// 调用importer方法openCgDetectorInfoService.importOpenCgDetectorInfo(list);// 存储完成清理listlist.clear();}
}

3.controller层加入方法（url需要与前端页面中的action的值对应）

	/*** excel导入开路式可燃气体探头模型*/@PostMapping("import-opencgdetectorinfo")@ApiOperationSupport(order = 12)@ApiOperation(value = "导入开路式可燃气体探头模型", notes = "传入excel")public R importOpenCgDetectorInfo(MultipartFile file, Integer isCovered) {String filename = file.getOriginalFilename();if (StringUtils.isEmpty(filename)) {throw new RuntimeException("请上传文件!");}if ((!StringUtils.endsWithIgnoreCase(filename, ".xls") && !StringUtils.endsWithIgnoreCase(filename, ".xlsx"))) {throw new RuntimeException("请上传正确的excel文件!");}InputStream inputStream;try {OpenCgDetectorInfoImportListener importListener = new OpenCgDetectorInfoImportListener(openCgDetectorInfoService);inputStream = new BufferedInputStream(file.getInputStream());ExcelReaderBuilder builder = EasyExcel.read(inputStream, OpenCgDetectorInfoExcel.class, importListener);builder.doReadAll();} catch (IOException e) {e.printStackTrace();}return R.success("操作成功");}

4.service层

 5.Impl

	/*** Excel导入开路式可燃气体探头模型* @param data*/@Overridepublic void importOpenCgDetectorInfo(List<OpenCgDetectorInfoExcel> data) {private OpenCgDetectorInfoMapper openCgDetectorInfoMapper;//遍历data，为每个对象手动插入雪花idfor(OpenCgDetectorInfoExcel excel : data ){IdentifierGenerator identifierGenerator=new DefaultIdentifierGenerator();excel.setId((long)identifierGenerator.nextId(new Object()));}openCgDetectorInfoMapper.importOpenCgDetectorInfo(data);}

6.mapper

 7.xml文件

    <!--    Excel导入开路式可燃气体探头模型--><insert id="importOpenCgDetectorInfo" parameterType="java.util.ArrayList">insert into `fgdm_open_cg_detector_info`(id,project_id,belong_type,probe_name,probe_num,probe_factory,com_medium,space_type,jz_diameter,real_coefficient,real_diameter,alarm_level_one,alarm_level_two,max_distance,probe_describe) values<foreach collection="list" index="index" separator="," item="item">(#{item.id},#{item.projectId},#{item.belongType},#{item.probeName},#{item.probeNum},#{item.probeFactory},#{item.comMedium},#{item.spaceType},#{item.jzDiameter},#{item.realCoefficient},#{item.realDiameter},#{item.alarmLevelOne},#{item.alarmLevelTwo},#{item.maxDistance},#{item.probeDescribe})</foreach></insert>