Excel工业级读取工具类

最近在做一个自动化匹配快速导入功能，对excel表格导入的一些问题发一个工业级的读取发工具类

import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddress;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.File;
import java.io.IOException;
import java.text.NumberFormat;

import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;
import org.apache.poi.ss.util.CellRangeAddress;


/**
 * Excel相关处理
 *
 * @author HUAWEI
 */
public class ExcelMaterialExtUtil {
    private static final Logger logger = LoggerFactory.getLogger(ExcelMaterialExtUtil.class);

    /**
     * 读取excel文件
     * @param sheetIndex    sheet页下标：从0开始
     * @param startReadLine 开始读取的行:从0开始
     * @param tailLine      去除最后读取的行
     */
    private static void readExcel(Workbook wb, int sheetIndex, int startReadLine, int tailLine) {
        Sheet sheet = wb.getSheetAt(sheetIndex);
        Row row = null;
        for (int i = startReadLine; i < sheet.getLastRowNum() - tailLine + 1; i++) {
            row = sheet.getRow(i);
            for (Cell c : row) {
                boolean isMerge = isMergedRegion(sheet, i, c.getColumnIndex());
                // 判断是否具有合并单元格
                if (isMerge) {
                    String rs = getMergedRegionValue(sheet, row.getRowNum(), c.getColumnIndex());
                    logger.info(rs + "");
                } else {
                    logger.info(getCellValue(c) + "");
                }
            }
        }
    }

    /**
     * 获取合并单元格的值
     */
    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;
    }

    /**
     * 判断合并了行
     */
    private static boolean isMergedRow(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;
    }

    /**
     * 判断指定的单元格是否是合并单元格
     * @param row    行下标
     * @param column 列下标
     */
    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;
    }

    /**
     * 判断sheet页中是否含有合并单元格
     */
    private static boolean hasMerged(Sheet sheet) {
        return sheet.getNumMergedRegions() > 0 ? true : false;
    }

    /**
     * 合并单元格
     * @param firstRow 开始行
     * @param lastRow  结束行
     * @param firstCol 开始列
     * @param lastCol  结束列
     */
    private static void mergeRegion(Sheet sheet, int firstRow, int lastRow, int firstCol, int lastCol) {
        sheet.addMergedRegion(new CellRangeAddress(firstRow, lastRow, firstCol, lastCol));
    }

    /**
     * 获得excel 单元格的值
     * @param cell
     * @return
     */
    public static String getCellValue(Cell cell) {
        if (cell == null) {return "";}

        if (cell.getCellType() == CellType.STRING) {
            return cell.getStringCellValue();
        }
        if (cell.getCellType() == CellType.BOOLEAN) {
            return String.valueOf(cell.getBooleanCellValue());
        }
        if (cell.getCellType() == CellType.FORMULA) {
            return formulaFormat(cell) ;
        }
        if (cell.getCellType() == CellType.NUMERIC) {
            Double numericCellValue = cell.getNumericCellValue() ;
            if( numericCellValue != null && numericCellValue%1.0==0 ){
                return Integer.toString( numericCellValue.intValue() );
            }
            return String.valueOf( numericCellValue );
        }
        if (cell.getCellType() == CellType.ERROR) {
            return String.valueOf(cell.getErrorCellValue());
        }
        return "";
    }

    /****
     * CellType.FORMULA 数据的处理
     * @param cell
     * @return
     */
    public static String formulaFormat( Cell cell ){
        String cellValue = "" ;
        switch (cell.getCachedFormulaResultType()) {
            case STRING:
                cellValue = cell.getStringCellValue();
                break;
            case NUMERIC:
                NumberFormat nf = NumberFormat.getInstance();
                nf.setGroupingUsed(false);
                cellValue = String.valueOf(nf.format(cell.getNumericCellValue()));
                break;
            case BOOLEAN:
                cellValue = String.valueOf(cell.getBooleanCellValue());
                break;
            default:
                cellValue = cell.getCellFormula();
        }
        return cellValue ;
    }
}