EasyExcel分页上传数据

wayne_youlu2024-02-06 18:19

EasyExcel分页上传数据

一、实例

  1. controller上传入口
java 复制代码 
 	@PostMapping("/upload")
    @ResponseBody
    @Log(title = "导入工单", businessType = BusinessType.IMPORT)
    public AjaxResult uploadFile(HttpServletRequest request, MultipartFile files) throws Exception {
        AjaxResult ajaxResult = this.checkFile(files);
        if (HttpStatus.SUCCESS != (int) ajaxResult.get(AjaxResult.CODE_TAG)) {
            return ajaxResult;
        }
        try {
            EasyExcel.read(files.getInputStream(), TWorkSheetReadVO.class, new WorkSheetListener(workSheetInnerService, new ArrayList<>())).sheet().doRead();
        } finally {
            //
        }
        return AjaxResult.success(String.format("上传成功"));
    }

	private AjaxResult checkFile(MultipartFile file) {
        String name = file.getOriginalFilename();
        String subName = name.substring(name.lastIndexOf('.'), name.length());
        if (!Lists.newArrayList(".xlsx", ".xls").contains(subName)) {
            return AjaxResult.error("只支持excel文件上传格式");
        }
        boolean checkSize = checkFileSize(file.getSize(), 10, "M");
        if(checkSize) return AjaxResult.success();
        return AjaxResult.error("上传的文件大小超过限制");
    }


    /**
     * 判断文件大小
     *
     * @param len  文件长度
     * @param size 限制大小
     * @param unit 限制单位（B,K,M,G）
     * @author youlu
     * @return
     */
    public static boolean checkFileSize(Long len, int size, String unit) {
		// long len = file.length();
        double fileSize = 0;
        if ("B".equals(unit.toUpperCase())) {
            fileSize = (double) len;
        } else if ("K".equals(unit.toUpperCase())) {
            fileSize = (double) len / 1024;
        } else if ("M".equals(unit.toUpperCase())) {
            fileSize = (double) len / 1048576;
        } else if ("G".equals(unit.toUpperCase())) {
            fileSize = (double) len / 1073741824;
        }
        if (fileSize > size) {
            return false;
        }
        return true;
    }
  1. 分页上传逻辑
java 复制代码 
package com.smy.ows.project.worksheet.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.smy.ows.project.worksheet.domain.vo.TWorkSheetReadVO;
import com.smy.ows.project.worksheet.service.inner.WorkSheetInnerService;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

/**
 * @Description
 * @ClassName ExcelModelListener
 * @Author youlu
 * @date 2023.02.02 15:01
 */
public class WorkSheetListener extends AnalysisEventListener<TWorkSheetReadVO> {

    private WorkSheetInnerService workSheetInnerService;
    private List<TWorkSheetReadVO> list;
    private static final int BATCH_COUNT = 1000;

    public WorkSheetListener(WorkSheetInnerService workSheetInnerService, List<TWorkSheetReadVO> list) {
        this.workSheetInnerService = workSheetInnerService;
        this.list = list;
    }


    @Override
    @Transactional
    public void invoke(TWorkSheetReadVO readVO, AnalysisContext analysisContext) {
        list.add(readVO);
        if (list.size() >= BATCH_COUNT) {
            workSheetInnerService.batchInsertWorkSheet(list);
            list.clear();
        }
    }

    /**
     * 所有数据解析完成了 都会来调用
     *
     * @param analysisContext
     */
    @Override
    @Transactional
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {
        //这里也要保存数据，确保最后遗留的数据也存储到数据库
        workSheetInnerService.batchInsertWorkSheet(list);
    }
}
  1. 插入数据库
bash 复制代码 
@Override
    public void batchInsertWorkSheet(List<TWorkSheetReadVO> list) {
        workSheetService.batchInsert(list);
    }
  1. 实体对象
java 复制代码 
package com.smy.ows.project.worksheet.domain.vo;

import com.alibaba.excel.annotation.ExcelProperty;
import com.alibaba.excel.annotation.write.style.ColumnWidth;
import com.alibaba.excel.annotation.write.style.HeadStyle;
import com.alibaba.excel.converters.date.DateStringConverter;
import com.alibaba.excel.enums.poi.FillPatternTypeEnum;
import com.fasterxml.jackson.annotation.JsonFormat;
import com.smy.framework.base.DesensitizationAnnotation;
import com.smy.ows.project.worksheet.enums.SheetLevelEnums;
import com.smy.ows.project.worksheet.enums.WorkSheetStatus;
import com.smy.ows.util.*;
import lombok.Data;

import java.io.Serializable;
import java.util.Date;

/**
 * 客诉工单对象 t_work_sheet
 *
 * @author smy
 * @date 2023-01-11
 */
@Data
public class TWorkSheetReadVO implements Serializable {
    private static final long serialVersionUID = 5924360788178861972L;

    /**
     * 客诉标题
     */
    @ExcelProperty(value = "客诉标题", index = 0)
    @ColumnWidth(20)
    private String complaintHeadline;
    /**
     * @see SheetLevelEnums
     */
    @ExcelProperty(value = "优先级", index = 1, converter = PriorityIntegerStringConverter.class)
    @ColumnWidth(10)
    @HeadStyle(fillPatternType = FillPatternTypeEnum.SOLID_FOREGROUND, fillForegroundColor = 40)
    private Integer priority;

    @ExcelProperty(value = "客户姓名", index = 2)
    @ColumnWidth(20)
    @HeadStyle(fillPatternType = FillPatternTypeEnum.SOLID_FOREGROUND, fillForegroundColor = 40)
    private String custName;

    /**
     * 客户号
     */
    @ExcelProperty(value = "客户号", index = 3)
    @ColumnWidth(20)
    private String custNo;

    @DesensitizationAnnotation
    @ExcelProperty(value = "客户手机号", index = 4)
    @ColumnWidth(20)
    @HeadStyle(fillPatternType = FillPatternTypeEnum.SOLID_FOREGROUND, fillForegroundColor = 40)
    private String custMobile;

    @DesensitizationAnnotation
    @ExcelProperty(value = "客户身份证", index = 5)
    @ColumnWidth(30)
    private String custIdNo;

    /**
     * 投诉时间
     */
    @ExcelProperty(value = "投诉时间(yyyy-MM-dd HH:mm:ss)", index = 6, converter = DateStringConverter.class)
    @ColumnWidth(40)
    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    private Date complaintTime;
    //反馈渠道
    @ExcelProperty(value = "反馈渠道", index = 7, converter = ChannelStringStringConverter.class)
    @ColumnWidth(15)
    @HeadStyle(fillPatternType = FillPatternTypeEnum.SOLID_FOREGROUND, fillForegroundColor = 40)
    private String feedbackChannel;


    @ExcelProperty(value = "工单类型", index = 8, converter = TypeIntegerStringConverter.class)
    @ColumnWidth(15)
    @HeadStyle(fillPatternType = FillPatternTypeEnum.SOLID_FOREGROUND, fillForegroundColor = 40)
    private Integer type;

    @ExcelProperty(value = "业务类型", index = 9, converter = BizTypeIntegerStringConverter.class)
    @ColumnWidth(15)
    @HeadStyle(fillPatternType = FillPatternTypeEnum.SOLID_FOREGROUND, fillForegroundColor = 40)
    private Integer bizType;

    @DesensitizationAnnotation
    @ExcelProperty(value = "客户联系方式", index = 10)
    @ColumnWidth(15)
    private String custContactMobile;

    /**
     * 所属资方
     */
    @ExcelProperty(value = "所属资方", index = 11)
    @ColumnWidth(15)
    private String capital;

    @ExcelProperty(value = "投诉内容", index = 12)
    @ColumnWidth(30)
    @HeadStyle(fillPatternType = FillPatternTypeEnum.SOLID_FOREGROUND, fillForegroundColor = 40)
    private String content;

    /**
     * @see WorkSheetStatus
     */
    @ExcelProperty(value = "工单状态", index = 13, converter = StatusIntegerStringConverter.class)
    @HeadStyle(fillPatternType = FillPatternTypeEnum.SOLID_FOREGROUND, fillForegroundColor = 40)
    @ColumnWidth(15)
    private Integer status;

    @ExcelProperty(value = "处理结果", index = 14, converter = ResultIntegerStringConverter.class)
    @ColumnWidth(15)
    private Integer result;
    /**
     * 处理情况
     */
    @ExcelProperty(value = "处理情况", index = 15)
    @ColumnWidth(15)
    private String handingInfo;

}

其中要注意的是converter格式转换使用 。也可以自定义转换，将上传的数据转换成真正要接收的数据，例如：

java 复制代码 
	@ExcelProperty(value = "优先级", index = 1, converter = PriorityIntegerStringConverter.class)
    @ColumnWidth(10)
    @HeadStyle(fillPatternType = FillPatternTypeEnum.SOLID_FOREGROUND, fillForegroundColor = 40)
    private Integer priority;

这个属性是Integer 类型的。上传的数据如下是字符串类型的（一般，紧急，特急）。因此需要将其映射成数据库对应的integer数据。此时就需要自定义转换，在convertToJavaData 方法中将字符串转换成相应的integer值。

java 复制代码 
package com.smy.ows.util;

import com.alibaba.excel.converters.Converter;
import com.alibaba.excel.enums.CellDataTypeEnum;
import com.alibaba.excel.metadata.GlobalConfiguration;
import com.alibaba.excel.metadata.data.ReadCellData;
import com.alibaba.excel.metadata.data.WriteCellData;
import com.alibaba.excel.metadata.property.ExcelContentProperty;
import com.google.common.collect.Lists;
import com.smy.ows.common.core.domain.entity.SysDictData;
import com.smy.ows.common.utils.ParamThreadLocal;
import com.smy.ows.project.worksheet.constant.WorksheetDictTypeConstant;

import java.text.ParseException;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.stream.Collectors;

public class PriorityIntegerStringConverter implements Converter<Integer> {
    public PriorityIntegerStringConverter() {
    }

    public Class<?> supportJavaTypeKey() {
        return Integer.class;
    }

    public CellDataTypeEnum supportExcelTypeKey() {
        return CellDataTypeEnum.STRING;
    }

    /**
     * 读
     * @author youlu
     * @date 2023/8/18 10:46
     * @param cellData
     * @param contentProperty
     * @param globalConfiguration
     * @return java.lang.Integer
     */
    public Integer convertToJavaData(ReadCellData<?> cellData, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) throws ParseException {
        String priorityDesc = cellData.getStringValue();
        Map<String, List<SysDictData>> dictDataMap = (Map<String, List<SysDictData>>) ParamThreadLocal.getParam();
        Map<String, SysDictData> dataMap = Optional.ofNullable(dictDataMap.get(WorksheetDictTypeConstant.WORKSHEET_PRIORITY)).orElse(Lists.newArrayList()).stream()
                .collect(Collectors.toMap(k -> k.getDictLabel(), m -> m, (m1, m2) -> m2));
        SysDictData sysDictData = dataMap.get(priorityDesc);
        if (sysDictData == null) {
            return -1;
        }
        return Integer.valueOf(sysDictData.getDictValue());
    }

    /**
     * 写
     * @author youlu
     * @date 2023/8/18 10:46
     * @param value
     * @param contentProperty
     * @param globalConfiguration
     * @return com.alibaba.excel.metadata.data.WriteCellData<?>
     */
    public WriteCellData<?> convertToExcelData(Integer value, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) {
        Map<String, List<SysDictData>> dictDataMap = (Map<String, List<SysDictData>>) ParamThreadLocal.getParam();
        Map<String, SysDictData> dataMap = Optional.ofNullable(dictDataMap.get(WorksheetDictTypeConstant.WORKSHEET_PRIORITY)).orElse(Lists.newArrayList()).stream()
                .collect(Collectors.toMap(k -> k.getDictValue(), m -> m, (m1, m2) -> m2));
        SysDictData sysDictData = dataMap.get(String.valueOf(value));
        if (sysDictData == null) {
            return new WriteCellData<String>("" + value);
        }
        return new WriteCellData<String>(sysDictData.getDictLabel());
    }
}

二、参考文档

easyExcel分页上传相应文档

相关推荐
2401_857610038 分钟前
Spring Boot框架：电商系统的技术优势
java·spring boot·后端
希忘auto24 分钟前
详解MySQL安装
java·mysql
冰淇淋烤布蕾36 分钟前
EasyExcel使用
java·开发语言·excel
拾荒的小海螺42 分钟前
JAVA：探索 EasyExcel 的技术指南
java·开发语言
Jakarta EE1 小时前
正确使用primefaces的process和update
java·primefaces·jakarta ee
马剑威（威哥爱编程）1 小时前
哇喔！20种单例模式的实现与变异总结
java·开发语言·单例模式
java—大象1 小时前
基于java+springboot+layui的流浪动物交流信息平台设计实现
java·开发语言·spring boot·layui·课程设计
图片转成excel表格2 小时前
Excel中怎么提取超出部分数值，比如5w是目标，超出100%和120%的值怎么用公式提取?
excel
杨哥带你写代码2 小时前
网上商城系统：Spring Boot框架的实现
java·spring boot·后端
camellias_2 小时前
SpringBoot（二十一）SpringBoot自定义CURL请求类
java·spring boot·后端
热门推荐
01玄机平台应急响应—webshell查杀02【HarmonyOS】HUAWEI DevEco Studio 下载地址汇总03组基轨迹建模 GBTM的介绍与实现（Stata 或 R）04新版微信小程序获取用户手机号05全面解析：构建基于深度学习的安全帽检测系统（UI界面+YOLO代码+数据集）06Windows10安装PCL1.14.0及点云配准07【TC3xx芯片】TC3xx芯片电源管理系统PMS详解08Ubuntu 20.04使用Livox mid 360 测试 FAST_LIO09基于YOLOv10深度学习的CT扫描图像肾结石智能检测系统【python源码+Pyqt5界面+数据集+训练代码】深度学习实战、目标检测10【软件工程】UML用例图介绍和实例说明