文章目錄

• 問題現象
• • 1、對於日期型別
  • • excel對日期型別篩選後正常現象
    • easyexcel匯出後對日期型別篩選後異常現象
  • 2、對於金額型別
  • 程式解決方案
  • • 實現類 OrderCellHandler.java

問題現象

1、對於日期型別

excel做篩選後應該支援按年、月、日篩選，而easyexcel 按註解 @DateTimeFormat(“yyyy-MM-dd”) 實現後雖然呈現格式上沒問題，但是單元格格式還是存在問題導致篩選後不正常，具體如圖效果：

excel對日期型別篩選後正常現象

easyexcel匯出後對日期型別篩選後異常現象

補充現象：
easyexcel 匯出後預設是未雙擊效果，上面得篩選結果就是未雙擊這版格式

PS：即使在excel手動設定單元格格式也不生效，所以只能程式解決！

2、對於金額型別

呈現效果類似上面日期問題，也是匯出預設得格式不是真正得數值型別，做合計得時候無法合計。

PS：即使在excel手動設定單元格格式也不生效，所以只能程式解決！

程式解決方案

實現一個註冊一個自定義handler，implements CellWriteHandler 即
.registerWriteHandler(new OrderCellHandler())

// 這裡需要設定不關閉流
EasyExcel.
 
write(response.getOutputStream(), clazz)
		.registerWriteHandler(new OrderCellHandler())
		.includeColumnFiledNames(columnNames)
		.autoCloseStream(Boolean.FALSE)
		.sheet(sheetName)
		.doWrite(data);

實現類 OrderCellHandler.java

package com.fawm.base.config.easy.excel.write.handler;

import com.alibaba.
 
excel.metadata.CellData;
import com.alibaba.excel.metadata.Head;
import com.alibaba.excel.write.handler.CellWriteHandler;
import com.alibaba.excel.write.metadata.holder.WriteSheetHolder;
import com.alibaba.excel.write.metadata.holder.WriteTableHolder;
import com.fawm.base.utils.CommonDateUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.usermodel.*;

import java.text.ParseException;
import java.util.Arrays;
import java.util.Date;
import java.util.List;

/**
 * 訂單匯出處理日期格式與金額類
 *
 * @author liumingxing
 */
public class OrderCellHandler implements CellWriteHandler {
    @Override
    public void beforeCellCreate(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, Row row, Head head, Integer columnIndex, Integer relativeRowIndex, Boolean isHead) {

    }

    @Override
    public void afterCellCreate(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, Cell cell, Head head, Integer relativeRowIndex, Boolean isHead) {

    }

    @Override
    public void afterCellDispose(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, List<CellData> cellDataList, Cell cell, Head head, Integer relativeRowIndex, Boolean isHead) {
        boolean columnTwoFlag = cell.getColumnIndex() == 2;
        boolean otherDateFlag = cell.getColumnIndex() >= 65 && cell.getColumnIndex() <= 71;
        boolean dateFlag = columnTwoFlag || otherDateFlag;
        int[] moneyColumnIndex = {8, 9, 10, 11, 51, 52, 53, 55, 57, 59, 61, 62, 64};
        int matchMoney = Arrays.stream(moneyColumnIndex).filter(item -> item == cell.getColumnIndex()).findAny().orElse(-1);
        boolean moneyColumnFlag = matchMoney != -1;
        boolean finalFlag = dateFlag || moneyColumnFlag;
        if (!isHead && finalFlag) {
            Workbook workbook = writeSheetHolder.getSheet().getWorkbook();
            CellStyle cellStyle = workbook.createCellStyle();
            String stringCellValue = cell.getStringCellValue();
            try {
                CreationHelper createHelper = workbook.getCreationHelper();
                if (StringUtils.isNotBlank(stringCellValue) && dateFlag) {
                    String[] patterns = {"yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd"};
                    Date date = CommonDateUtils.parseDate(stringCellValue, patterns);
                    if (columnTwoFlag) {
                        //訂單生成日期
                        cellStyle.setDataFormat(createHelper.createDataFormat().getFormat("m/d/yy h:mm:ss"));
                    } else {
                        //其他日期列
                        cellStyle.setDataFormat(createHelper.createDataFormat().getFormat("m/d/yy"));
                    }
                    cell.setCellStyle(cellStyle);
                    cell.setCellValue(date);
                } else if (StringUtils.isNotBlank(stringCellValue) && moneyColumnFlag) {
                    //其他金額列
                    Float money = Float.parseFloat(stringCellValue);
                    cellStyle.setDataFormat(createHelper.createDataFormat().getFormat("#,##0.00"));
                    cell.setCellStyle(cellStyle);
                    cell.setCellValue(money);
                }
            } catch (ParseException e) {
                e.printStackTrace();
            }

        }
    }
}