将不规则EXCEL表格以json形式导出数据——工具类（代码可用）

package com.sgcc.custom.common.utils.excel.yupont;

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.sgcc.custom.common.utils.ResultInDBSaver;
import com.yupont.util.DbUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFColor;
import org.apache.poi.xssf.usermodel.XSSFFont;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.*;
@Slf4j
public class POIExcelToHandsontable {

    private Integer uploadlogid;



    public static Workbook getWorkBook(MultipartFile file) {

        //获得文件名

        String fileName = file.getOriginalFilename();

        //创建Workbook工作薄对象，表示整个excel

        Workbook workbook = null;

        try {

            //获取excel文件的io流

            InputStream is = file.getInputStream();

            //根据文件后缀名不同(xls和xlsx)获得不同的Workbook实现类对象

            if (fileName.endsWith("xls")) {

                //excel 2003版本

                workbook = new HSSFWorkbook(is);

            } else if (fileName.endsWith("xlsx")) {

                //excel 2007版本

                workbook = new XSSFWorkbook(is);

            }

        } catch (IOException e) {

            log.info(e.getMessage());

        }

        return workbook;

    }

    /**
     * 程序入口方法
     * @param file 文件
     * @param isWithStyle 是否需要表格样式 包含 字体 颜色 边框 对齐方式
     * @return <table>...</table> 字符串
     */
    public JSONArray readExcelToHandson(MultipartFile file, boolean isWithStyle){

        InputStream is = null;
        JSONArray arr = new JSONArray();
        try {
           // String absolutePath = new File(filePath).getAbsolutePath();

            Workbook wb = getWorkBook(file);
            if (wb instanceof XSSFWorkbook) {
                XSSFWorkbook xWb = (XSSFWorkbook) wb;
                arr= getExcelInfo(xWb,isWithStyle);
            }else if(wb instanceof HSSFWorkbook){
                HSSFWorkbook hWb = (HSSFWorkbook) wb;
                arr = getExcelInfo(hWb,isWithStyle);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }finally{
            try {
                if(is != null) is.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return arr;
    }



    private JSONArray getExcelInfo(Workbook wb,boolean isWithStyle){
        /* 用于第二步中修改excel中的值后回显修改后的值 end */
        JSONArray arr = new JSONArray();
        for(int i = 0;i< wb.getNumberOfSheets();i++){
            JSONObject jsonObject = new JSONObject();
            List<List> datas = new ArrayList<>();//Excel数据
            JSONArray array = new JSONArray();//Excel样式
            Sheet sheet = wb.getSheetAt(i);//获取每一个Sheet页的内容
            int lastRowNum = sheet.getLastRowNum();
            //0是记录跨域内容
            Map<String, String> map[] = getRowSpanColSpanMap(sheet);//获取合并单元格的信息
            Row row = null;        //兼容
            Cell cell = null;    //兼容
            boolean isContainSerial = false;//是否含有序号标志（防止表格中的序号值变为double值）
            int num = 0;
            List<Map<String,Object>> mergeCell = new ArrayList<>();
            int maxLength =0;
            for (int rowNum = sheet.getFirstRowNum(); rowNum <= lastRowNum; rowNum++) {
                row = sheet.getRow(rowNum);
                if (row == null) {
                    continue;
                }

                JSONObject style= null;
                List<String> content = new ArrayList<>();
                int lastColNum = row.getLastCellNum();
                if(lastColNum>maxLength){
                    maxLength=lastColNum;
                }
                for (int colNum = 0; colNum < lastColNum; colNum++) {
                    cell = row.getCell(colNum);
                    if (cell == null) {    //特殊情况 空白的单元格会返回null
                        content.add("");
                        continue;
                    }
                    style = new JSONObject();
                    String stringValue = ParserUtil.getCellValue(cell);
                    String tmp = ParserUtil.getCellValue(cell);
                    /*  特殊形况，防止序号列的值变为double start  */
                    if(isContainSerial && num == colNum){
                        try {
                            stringValue = stringValue.substring(0,stringValue.indexOf("."));
                        } catch (Exception e){
                            stringValue = tmp;
                        }
                    }
                    if("序号".equals(cell.toString())){
                        isContainSerial = true;
                        num = colNum;
                    }
                    content.add(stringValue);
                    //如果当前cell是跨域
                    if (map[0].containsKey(rowNum + "," + colNum)) {
                        String pointString = map[0].get(rowNum + "," + colNum);
                        map[0].remove(rowNum + "," + colNum);

                        int bottomeRow = Integer.valueOf(pointString.split(",")[0]);//最后一行
                        int bottomeCol = Integer.valueOf(pointString.split(",")[1]);//最后一列
                        int rowSpan = bottomeRow - rowNum + 1;//最后一行减去当前行
                        int colSpan = bottomeCol - colNum + 1;
                        Map<String,Object> mapcell = new HashMap<>();
                        mapcell.put("row",rowNum);
                        mapcell.put("col",colNum);
                        mapcell.put("rowspan",rowSpan);
                        mapcell.put("colspan",colSpan);
                        mergeCell.add(mapcell);
                    //   style.put("mergeCells",mapcell);
                        List<Integer> position = new ArrayList<>();
                        position.add(rowNum);
                        position.add(colNum);
                        position.add(rowNum+1);
                        position.add(colNum+1);
                        //判断是否需要样式，给合并单元格添加样式
                        if(isWithStyle){
                            dealExcelStyle(wb, sheet, cell, style,position);//处理单元格样式
                        }
                    } else if (map[1].containsKey(rowNum + "," + colNum)) {
                        map[1].remove(rowNum + "," + colNum);
                        continue;
                    } else {
                        //判断是否需要样式，给非合并单元格添加样式
                        if(isWithStyle){
                            List<Integer> position = new ArrayList<>();
                            position.add(rowNum);
                            position.add(colNum);
                            position.add(rowNum+1);
                            position.add(colNum+1);

                            dealExcelStyle(wb, sheet, cell, style,position);//处理单元格样式


                        }
                    }
                    if (stringValue == null || "".equals(stringValue.trim())) {
                        //sb.append(" &nbsp; ");
                    } else {
                        // 将ascii码为160的空格转换为html下的空格（&nbsp;）
                        // sb.append(stringValue.replace(String.valueOf((char) 160),"&nbsp;"));
                    }
                    if(!style.isEmpty()){
                        array.add(style);
                        jsonObject.put("styles",array);
                    }
                }
                datas.add(content);
            }
           for(List list:datas){
               if(list.size()<maxLength){
                   int  gapValue =maxLength-list.size();
                   for(int z=0;z<gapValue;z++){
                       list.add("");
                   }
               }
           }
            jsonObject.put("mergeCells",mergeCell);
            jsonObject.put("data",datas);
            jsonObject.put("name",sheet.getSheetName());
            jsonObject.put("sheetNum",i);
            arr.add(jsonObject);
        }
        return arr;
    }

    private static Map<String, String>[] getRowSpanColSpanMap(Sheet sheet) {

        Map<String, String> map0 = new HashMap<String, String>();
        Map<String, String> map1 = new HashMap<String, String>();
        int mergedNum = sheet.getNumMergedRegions();
        CellRangeAddress range = null;
        for (int i = 0; i < mergedNum; i++) {
            range = sheet.getMergedRegion(i);//合并单元格
            int topRow = range.getFirstRow();//第一行
            int topCol = range.getFirstColumn();//第一列
            int bottomRow = range.getLastRow();//最后一行
            int bottomCol = range.getLastColumn();//最后一列
            map0.put(topRow + "," + topCol, bottomRow + "," + bottomCol);//key为顶部行+顶部列    ，值为底部列+底部行
            int tempRow = topRow;
            while (tempRow <= bottomRow) {//初始行小于底部行 正常
                int tempCol = topCol;
                while (tempCol <= bottomCol) {//初始列小于底部行 正常
                    map1.put(tempRow + "," + tempCol, "");//第一行，第一列
                    tempCol++;
                }
                tempRow++;
            }
            map1.remove(topRow + "," + topCol);//排出异常的值
        }
        Map[] map = { map0, map1 };
        return map;
    }


    /**
     * 获取表格单元格Cell内容
     * @param cell
     * @return
     */
    private static String getCellValue(Cell cell) {

        String result = new String();
        if(cell.getCellType().equals(CellType.NUMERIC)){// 数字类型
            if (HSSFDateUtil.isCellDateFormatted(cell)) {// 处理日期格式、时间格式
                SimpleDateFormat sdf = null;
                if (cell.getCellStyle().getDataFormat() == HSSFDataFormat.getBuiltinFormat("h:mm")) {
                    sdf = new SimpleDateFormat("HH:mm");
                } else {// 日期
                    sdf = new SimpleDateFormat("yyyy-MM-dd");
                }
                Date date = cell.getDateCellValue();
                result = sdf.format(date);
            } else if (cell.getCellStyle().getDataFormat() == 58) {
                // 处理自定义日期格式：m月d日(通过判断单元格的格式id解决，id的值是58)
                SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
                double value = cell.getNumericCellValue();
                Date date = DateUtil
                        .getJavaDate(value);
                result = sdf.format(date);
            } else {
                double value = cell.getNumericCellValue();
                CellStyle style = cell.getCellStyle();
                DecimalFormat format = new DecimalFormat();
                    /*String temp = style.getDataFormatString();
                    // 单元格设置成常规
                    if (temp.equals("General")) {
                        format.applyPattern("#");
                    }*/
                //result = format.format(value);
                result= String.valueOf(value);
                return result;
            }
        }
        else if(cell.getCellType().equals(CellType.NUMERIC)){
            result = "";
            return result;
        }
        else {
            result = "";
        }
        return result;
    }

    /**
     * 处理表格样式
     * @param wb
     * @param sheet
     * @param cell
     * @param
     */
    private static void dealExcelStyle(Workbook wb,Sheet sheet,Cell cell,JSONObject style,List<Integer> index){
        CellStyle cellStyle = cell.getCellStyle();
        JSONObject obj = new JSONObject();
        if (cellStyle != null) {
            obj.put("row",index.get(0));
            obj.put("col",index.get(1));
            obj.put("text-align",convertAlignToHtml(cellStyle.getAlignment().getCode()));
            obj.put("valign",convertVerticalAlignToHtml(cellStyle.getVerticalAlignment().getCode()));
            if (wb instanceof XSSFWorkbook) {
                XSSFFont xf = ((XSSFCellStyle) cellStyle).getFont();
                obj.put("font-weight",(xf.getBold()?"bold":"none"));
                obj.put("font-size",xf.getFontHeightInPoints() + PX);
                obj.put("width",sheet.getColumnWidthInPixels(cell.getColumnIndex()) + PX);
                XSSFColor xc = xf.getXSSFColor();
                if (xc != null) {
                    obj.put("font-color","#"+xc.getARGBHex().substring(2));
                }
                XSSFColor bgColor = (XSSFColor) cellStyle.getFillForegroundColorColor();
                if (bgColor != null) {
                    obj.put("background","#" + bgColor.getARGBHex().substring(2));
                }
                obj.put("border-top",getBorderStyle(0,cellStyle.getBorderTop().getCode(), ((XSSFCellStyle) cellStyle).getTopBorderXSSFColor()));
                obj.put("border-right",getBorderStyle(1,cellStyle.getBorderRight().getCode(), ((XSSFCellStyle) cellStyle).getRightBorderXSSFColor()));
                obj.put("border-bottom",getBorderStyle(2,cellStyle.getBorderBottom().getCode(), ((XSSFCellStyle) cellStyle).getBottomBorderXSSFColor()));
                obj.put("border-left",getBorderStyle(3,cellStyle.getBorderLeft().getCode(), ((XSSFCellStyle) cellStyle).getLeftBorderXSSFColor()));
            }else if(wb instanceof HSSFWorkbook){
                HSSFFont hf = ((HSSFCellStyle) cellStyle).getFont(wb);
                short fontColor = hf.getColor();
                HSSFPalette palette = ((HSSFWorkbook) wb).getCustomPalette(); // 类HSSFPalette用于求的颜色的国际标准形式
                HSSFColor hc = palette.getColor(fontColor);
                obj.put("font-weight",(hf.getBold()?"bold":"none"));
                obj.put("font-size",hf.getFontHeightInPoints() + PX);
                String fontColorStr = convertToStardColor(hc);
                if (fontColorStr != null && !"".equals(fontColorStr.trim())) {
                    obj.put("font-color",fontColorStr);
                }
                obj.put("width",sheet.getColumnWidthInPixels(cell.getColumnIndex()) + PX);
                hc = palette.getColor(cellStyle.getFillForegroundColor());
                String bgColorStr = convertToStardColor(hc);
                if (bgColorStr != null && !"".equals(bgColorStr.trim())) {
                    obj.put("background-color",bgColorStr);
                }
                obj.put("border-top",getBorderStyle(palette,0,cellStyle.getBorderTop().getCode(),cellStyle.getTopBorderColor()));
                obj.put("border-right",getBorderStyle(palette,1,cellStyle.getBorderRight().getCode(),cellStyle.getRightBorderColor()));
                obj.put("border-bottom", getBorderStyle(palette,2,cellStyle.getBorderBottom().getCode(),cellStyle.getBottomBorderColor()));
                obj.put("border-left",getBorderStyle(palette,3,cellStyle.getBorderLeft().getCode(),cellStyle.getLeftBorderColor()));
            }
        }
        for(String key:obj.keySet()){
            obj.put(key,obj.get(key)+";");
        }
        style.put("style",obj);
    }

    /**
     * 单元格内容的水平对齐方式
     * @param alignment
     * @return
     */
    private static String convertAlignToHtml(short alignment) {

        String align = "left";
   /*     switch (alignment) {

            case CellStyle.ALIGN_LEFT:
                align = "left";
                break;
            case CellStyle.ALIGN_CENTER:
                align = "center";
                break;
            case CellStyle.ALIGN_RIGHT:
                align = "right";
                break;
            default:
                break;
        }*/
        if(HorizontalAlignment.LEFT.getCode()==alignment){
            align ="left";
        }
        if(HorizontalAlignment.CENTER.getCode()==alignment){
            align ="center";
        }
        if(HorizontalAlignment.RIGHT.getCode()==alignment){
            align ="right";
        }
        return align;
    }

    /**
     * 单元格中内容的垂直排列方式
     * @param verticalAlignment
     * @return
     */
    private static String convertVerticalAlignToHtml(short verticalAlignment) {

        String valign = "middle";
        /*
        switch (verticalAlignment) {
          case CellStyle.VERTICAL_BOTTOM:
                valign = "bottom";
                break;
            case CellStyle.VERTICAL_CENTER:
                valign = "center";
                break;
            case CellStyle.VERTICAL_TOP:
                valign = "top";
                break;
            default:
                break;
        }
        */

        if(VerticalAlignment.BOTTOM.getCode()==verticalAlignment){
            valign ="bottom";
        }
        if(VerticalAlignment.CENTER.getCode()==verticalAlignment){
            valign ="center";
        }
        if(VerticalAlignment.TOP.getCode()==verticalAlignment){
            valign ="top";
        }
        return valign;
    }

    private static String convertToStardColor(HSSFColor hc) {

        StringBuffer sb = new StringBuffer("");
        if (hc != null) {
            if (HSSFColor.HSSFColorPredefined.AUTOMATIC.getIndex() == hc.getIndex()) {
                return null;
            }
            sb.append("#");
            for (int i = 0; i < hc.getTriplet().length; i++) {
                sb.append(fillWithZero(Integer.toHexString(hc.getTriplet()[i])));
            }
        }

        return sb.toString();
    }

    private static String fillWithZero(String str) {
        if (str != null && str.length() < 2) {
            return "0" + str;
        }
        return str;
    }

//    private static String[] bordesr={"border-top:","border-right:","border-bottom:","border-left:"};
    private static String[] borderStyles={"solid ","solid ","solid ","solid ","solid ","solid ","solid ","solid ","solid ","solid","solid","solid","solid","solid"};
    private static final String PX = "px";

    private static  String getBorderStyle(  HSSFPalette palette ,int b,short s, short t){
        if(s==0)return  borderStyles[s]+"#d0d7e5 1px";
        String borderColorStr = convertToStardColor( palette.getColor(t));
        borderColorStr=borderColorStr==null|| borderColorStr.length()<1?"#000000":borderColorStr;
        return borderStyles[s]+borderColorStr+" 1px";
    }

    private static  String getBorderStyle(int b,short s, XSSFColor xc){

        if(s==0)return  borderStyles[s]+"#d0d7e5 1px";
        if (xc != null) {
            String borderColorStr = xc.getARGBHex();//t.getARGBHex();
            borderColorStr=borderColorStr==null|| borderColorStr.length()<1?"#000000":borderColorStr.substring(2);
            return borderStyles[s]+borderColorStr+" 1px";
        }

        return "";
    }

    public Integer getUploadlogid() {
        return uploadlogid;
    }

    public POIExcelToHandsontable setUploadlogid(Integer uploadlogid) {
        this.uploadlogid = uploadlogid;
        return this;
    }
}