newcpms/master/src/main/java/com/ruoyi/common/utils/file/ExcelUtils.java

package com.ruoyi.common.utils.file;

import org.apache.commons.lang.time.DateFormatUtils;
import org.apache.poi.hssf.usermodel.HSSFDataFormat;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddress;
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.math.BigDecimal;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

/**
 * Created by Administrator on 2018/7/26 0026.
 */
public class ExcelUtils {

    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")) {
                //2003
                workbook = new HSSFWorkbook(is);
            } else if (fileName.endsWith("xlsx")||fileName.endsWith("xlsm")) {
                //2007 及2007以上
                workbook = new XSSFWorkbook(is);
            }
        } catch (IOException e) {
//            log.error(e.getMessage());
        }
        return workbook;
    }

    public static Workbook getWorkBook(File file) {
        //获得文件名
        String fileName = file.getName();
        //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 =new FileInputStream(file);
            //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")) {
                //2003
                workbook = new HSSFWorkbook(is);
            } else if (fileName.endsWith("xlsx")) {
                //2007 及2007以上
                workbook = new XSSFWorkbook(is);
            }
        } catch (IOException e) {
//            log.error(e.getMessage());
        }
        return workbook;
    }

    public static String getCellValue(Cell cell) {
        String cellValue = "";
        if (cell == null) {
            return cellValue;
        }
        System.out.println("Excel格式："+ cell.getCellType().name());

        switch (cell.getCellType().name()) {
            case "STRING":
                cellValue = cell.getRichStringCellValue().getString();
                break;
            case "NUMERIC":
                System.out.println("Excel数据样式："+ cell.getCellStyle().getDataFormatString());
                if("General".equals(cell.getCellStyle().getDataFormatString())){
                    cellValue = new BigDecimal(cell.getNumericCellValue()).toPlainString();
                }else if("m/d/yyyy;@".equals(cell.getCellStyle().getDataFormatString())){
                    cellValue =  new SimpleDateFormat("yyyy-MM-dd").format(cell.getDateCellValue());
                }else if("@".equals(cell.getCellStyle().getDataFormatString())){
                    cellValue = cell.getNumericCellValue() + "";
                }else if(cell.getCellStyle().getDataFormatString().indexOf("0_") > -1){
                    //数字非日期
                    System.out.println("Excel值："+ cell.getNumericCellValue());
                    cellValue = cell.getNumericCellValue() + "";
                }else{
                    try {
                        cellValue =  new SimpleDateFormat("yyyy-MM-dd").format(cell.getDateCellValue());
                    }catch (Exception e){
                        cellValue = cell.getNumericCellValue() + "";
                    }
                }
                break;
            case "BLANK":
                cellValue = "";
                break;
            default:
                cellValue = cell.toString();
                break;
        }
        //判断数据的类型
//        switch (cell.getCellType()) {
//            case Cell.CELL_TYPE_NUMERIC: //数字
//                cellValue = stringDateProcess(cell);
//                break;
//            case Cell.CELL_TYPE_STRING: //字符串
//                cellValue = String.valueOf(cell.getStringCellValue());
//                break;
//            case Cell.CELL_TYPE_BOOLEAN: //Boolean
//                cellValue = String.valueOf(cell.getBooleanCellValue());
//                break;
//            case Cell.CELL_TYPE_FORMULA: //公式
//                cellValue = String.valueOf(cell.getCellFormula());
//                break;
//            case Cell.CELL_TYPE_BLANK: //空值
//                cellValue = "";
//                break;
//            case Cell.CELL_TYPE_ERROR: //故障
//                cellValue = "非法字符";
//                break;
//            default:
//                cellValue = "未知类型";
//                break;
//        }
//        cellValue = String.valueOf(cell.getStringCellValue());
        return cellValue;
    }

    /**
     * 时间格式处理
     *
     * @return
     * @author Liu Xin Nan
     * @data 2017年11月27日
     */
    public static String stringDateProcess(Cell cell) {
        String result = new String();
        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 hh:mm:ss");
            }
            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 hh:mm:ss");
            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);
        }

        return result;
    }

    /**
     * 合并单元格处理,获取合并行
     *
     * @param sheet
     * @return List<CellRangeAddress>
     */
    public static List<CellRangeAddress> getCombineCell(Sheet sheet) {
        List<CellRangeAddress> list = new ArrayList<CellRangeAddress>();
        //获得一个 sheet 中合并单元格的数量
        int sheetmergerCount = sheet.getNumMergedRegions();
        //遍历所有的合并单元格
        for (int i = 0; i < sheetmergerCount; i++) {
            //获得合并单元格保存进list中
            CellRangeAddress ca = sheet.getMergedRegion(i);
            list.add(ca);
        }
        return list;
    }

    public static int getRowNum(List<CellRangeAddress> listCombineCell, Cell cell, Sheet sheet) {
        int xr = 0;
        int firstC = 0;
        int lastC = 0;
        int firstR = 0;
        int lastR = 0;
        for (CellRangeAddress ca : listCombineCell) {
            //获得合并单元格的起始行, 结束行, 起始列, 结束列
            firstC = ca.getFirstColumn();
            lastC = ca.getLastColumn();
            firstR = ca.getFirstRow();
            lastR = ca.getLastRow();
            if (cell.getRowIndex() >= firstR && cell.getRowIndex() <= lastR) {
                if (cell.getColumnIndex() >= firstC && cell.getColumnIndex() <= lastC) {
                    xr = lastR;
                }
            }
        }
        return xr;

    }

    /**
     * 判断单元格是否为合并单元格，是的话则将单元格的值返回
     *
     * @param listCombineCell 存放合并单元格的list
     * @param cell            需要判断的单元格
     * @param sheet           sheet
     * @return
     */
    public static String isCombineCell(List<CellRangeAddress> listCombineCell, Cell cell, Sheet sheet)
            throws Exception {
        int firstC = 0;
        int lastC = 0;
        int firstR = 0;
        int lastR = 0;
        String cellValue = null;
        for (CellRangeAddress ca : listCombineCell) {
            //获得合并单元格的起始行, 结束行, 起始列, 结束列
            firstC = ca.getFirstColumn();
            lastC = ca.getLastColumn();
            firstR = ca.getFirstRow();
            lastR = ca.getLastRow();
            if (cell.getRowIndex() >= firstR && cell.getRowIndex() <= lastR) {
                if (cell.getColumnIndex() >= firstC && cell.getColumnIndex() <= lastC) {
                    Row fRow = sheet.getRow(firstR);
                    Cell fCell = fRow.getCell(firstC);
                    cellValue = getCellValue(fCell);
                    break;
                }
            } else {
                cellValue = "";
            }
        }
        return cellValue;
    }

    /**
     * 获取合并单元格的值
     *
     * @param sheet
     * @param row
     * @param column
     * @return
     */
    public static String getMergedRegionValue(Sheet sheet, int row, int column) {
        int sheetMergeCount = sheet.getNumMergedRegions();

        for (int i = 0; i < sheetMergeCount; i++) {
            CellRangeAddress ca = sheet.getMergedRegion(i);
            int firstColumn = ca.getFirstColumn();
            int lastColumn = ca.getLastColumn();
            int firstRow = ca.getFirstRow();
            int lastRow = ca.getLastRow();

            if (row >= firstRow && row <= lastRow) {
                if (column >= firstColumn && column <= lastColumn) {
                    Row fRow = sheet.getRow(firstRow);
                    Cell fCell = fRow.getCell(firstColumn);
                    return getCellValue(fCell);
                }
            }
        }

        return null;
    }

    /**
     * 判断指定的单元格是否是合并单元格
     *
     * @param sheet
     * @param row    行下标
     * @param column 列下标
     * @return
     */
    public static boolean isMergedRegion(Sheet sheet, int row, int column) {
        int sheetMergeCount = sheet.getNumMergedRegions();
        for (int i = 0; i < sheetMergeCount; i++) {
            CellRangeAddress range = sheet.getMergedRegion(i);
            int firstColumn = range.getFirstColumn();
            int lastColumn = range.getLastColumn();
            int firstRow = range.getFirstRow();
            int lastRow = range.getLastRow();
            if (row >= firstRow && row <= lastRow) {
                if (column >= firstColumn && column <= lastColumn) {
                    return true;
                }
            }
        }
        return false;
    }

}