工具方法：java读取Excel合并单元格（简单实例）

 Apache POI是Apache软件基金会的开源项目，POI提供API给Java程序对Microsoft Office格式档案读和写的功能。 .NET的开发人员则可以利用NPOI (POI for .NET) 来存取 Microsoft Office文档的功能。

需要的mavan依赖：

       <!-- Excel poi -->
       <dependency>
		   <groupId>org.apache.poi</groupId>
		   <artifactId>poi</artifactId>
		   <version>3.9</version>
		</dependency>
		<dependency>
		   <groupId>org.apache.poi</groupId>
		   <artifactId>poi-ooxml</artifactId>
		   <version>3.9</version>
		</dependency>
		<dependency>
		   <groupId>org.apache.poi</groupId>
		   <artifactId>poi-ooxml-schemas</artifactId>
		   <version>3.9</version>
		</dependency>

ExcelUtil.java

package com.citywy.controller;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.*;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
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.xssf.usermodel.XSSFWorkbook;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.WorkbookFactory;
import org.apache.poi.ss.util.CellRangeAddress;

public class ExcelUtil {
    public static void main(String[] args){
        ExcelUtil excelUtil = new ExcelUtil();
        //读取excel数据
        ArrayList<Map<String,String>> result = excelUtil.readExcelToObj("d:\first\a.xlsx");
        for(Map<String,String> map:result){
            System.out.println("输出："+map);
        }
    }
    /**
     * 读取excel数据
     * @param path
     */
    private ArrayList<Map<String,String>> readExcelToObj(String path) {

        Workbook wb = null;
        ArrayList<Map<String,String>> result = null;
        try {
            wb = WorkbookFactory.create(new File(path));
            result = readExcel(wb, 0, 1, 0);
        } catch (InvalidFormatException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return result;
    }

    /**
     * 读取excel文件
     * @param wb
     * @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 ArrayList<Map<String,String>> readExcel(Workbook wb,int sheetIndex, int startReadLine, int tailLine) {
        Sheet sheet = wb.getSheetAt(sheetIndex);
        Row row = null;
        ArrayList<Map<String,String>> result = new ArrayList<Map<String,String>>();
        for(int i=startReadLine; i<sheet.getLastRowNum()-tailLine+1; i++) {

            row = sheet.getRow(i);
            Map<String,String> map = new HashMap<String,String>();
            for(Cell c : row) {
                String returnStr = "";
                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());
//                    System.out.print(rs + "------ ");
                    returnStr = rs;
                }else {
//                    System.out.print(c.getRichStringCellValue()+"++++ ");
                    returnStr = c.getRichStringCellValue().getString();
                }
                if(c.getColumnIndex()==0){
                    map.put("id",returnStr);
                }else if(c.getColumnIndex()==1){
                    map.put("base",returnStr);
                }else if(c.getColumnIndex()==2){
                    map.put("siteName",returnStr);
                }else if(c.getColumnIndex()==3){
                    map.put("articleName",returnStr);
                }else if(c.getColumnIndex()==4){
                    map.put("mediaName",returnStr);
                }else if(c.getColumnIndex()==5){
                    map.put("mediaUrl",returnStr);
                }else if(c.getColumnIndex()==6){
                    map.put("newsSource",returnStr);
                }else if(c.getColumnIndex()==7){
                    map.put("isRecord",returnStr);
                }else if(c.getColumnIndex()==8){
                    map.put("recordTime",returnStr);
                }else if(c.getColumnIndex()==9){
                    map.put("remark",returnStr);
                }
            }
            result.add(map);
        }
        return result;
    }

    /**
     * 获取合并单元格的值
     * @param sheet
     * @param row
     * @param column
     * @return
     */
    public 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
     * @param sheet
     * @param row
     * @param column
     * @return
     */
    private 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 sheet
     * @param row 行下标
     * @param column 列下标
     * @return
     */
    private 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
     * @param sheet
     * @return
     */
    private boolean hasMerged(Sheet sheet) {
        return sheet.getNumMergedRegions() > 0 ? true : false;
    }

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

    /**
     * 获取单元格的值
     * @param cell
     * @return
     */
    public String getCellValue(Cell cell){

        if(cell == null) return "";

        if(cell.getCellType() == Cell.CELL_TYPE_STRING){

            return cell.getStringCellValue();

        }else if(cell.getCellType() == Cell.CELL_TYPE_BOOLEAN){

            return String.valueOf(cell.getBooleanCellValue());

        }else if(cell.getCellType() == Cell.CELL_TYPE_FORMULA){

            return cell.getCellFormula() ;

        }else if(cell.getCellType() == Cell.CELL_TYPE_NUMERIC){

            return String.valueOf(cell.getNumericCellValue());

        }
        return "";
    }
    /**
     * 从excel读取内容
     */
    public static void readContent(String fileName)  {
        boolean isE2007 = false;    //判断是否是excel2007格式
        if(fileName.endsWith("xlsx"))
            isE2007 = true;
        try {
            InputStream input = new FileInputStream(fileName);  //建立输入流
            Workbook wb  = null;
            //根据文件格式(2003或者2007)来初始化
            if(isE2007)
                wb = new XSSFWorkbook(input);
            else
                wb = new HSSFWorkbook(input);
            Sheet sheet = wb.getSheetAt(0);     //获得第一个表单
            Iterator<Row> rows = sheet.rowIterator(); //获得第一个表单的迭代器
            while (rows.hasNext()) {
                Row row = rows.next();  //获得行数据
                System.out.println("Row #" + row.getRowNum());  //获得行号从0开始
                Iterator<Cell> cells = row.cellIterator();    //获得第一行的迭代器
                while (cells.hasNext()) {
                    Cell cell = cells.next();
                    System.out.println("Cell #" + cell.getColumnIndex());
                    switch (cell.getCellType()) {   //根据cell中的类型来输出数据
                        case HSSFCell.CELL_TYPE_NUMERIC:
                            System.out.println(cell.getNumericCellValue());
                            break;
                        case HSSFCell.CELL_TYPE_STRING:
                            System.out.println(cell.getStringCellValue());
                            break;
                        case HSSFCell.CELL_TYPE_BOOLEAN:
                            System.out.println(cell.getBooleanCellValue());
                            break;
                        case HSSFCell.CELL_TYPE_FORMULA:
                            System.out.println(cell.getCellFormula());
                            break;
                        default:
                            System.out.println("unsuported sell type======="+cell.getCellType());
                            break;
                    }
                }
            }
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }
}

附加个人需求：

/**
	 * str最后一行读不到，手动最后加一行废数据
	 * 附加：将读取的内容合并为	
	 * 【高危职业】什么是高危职业_十大高危职业_xxx_xxx_xxx 最多8条
	 * 所属栏目读取最后一个/后的值  职业病防治 
	 */
    public static void main(String[] args){
        ExcelUtil excelUtil = new ExcelUtil();
        //读取excel数据
        ArrayList<Map<String,String>> result = excelUtil.readExcelToObj("d:\xreadexcel\a.xlsx");
        Map<String, Object> result1 = new HashMap<String, Object>();
        String str="";
        for(Map<String,String> map:result){
            String id = map.get("id");
            String value = map.get("base");
            String menu = map.get("siteName");
            if(menu.contains("/")){
            	menu=menu.substring(menu.lastIndexOf("/")+1);
            }
    		if(result1.containsKey(id)){
    			if(getCount(str, "_")<7){
    				str=str+"_"+value;	
    			}
    		}else{
    			if(!str.equals("")){
    				System.out.println(str);	//【高危职业】什么是高危职业_十大高危职业_..._..._...最多8条
    			}
    			//System.out.println(id);	//高危职业
    			//System.out.println(menu.trim());//职业病防治 
    			str="【"+id+"】"+value;
    			result1.put(id, value);
    		}
        }
    }
    /**
     * 获取字符串指定字符个数
     * @param str
     * @param tag
     * @return
     */
    public static int getCount(String str, String tag) {
		int index = 0;
		int count = 0;	   
		while ((index = str.indexOf(tag)) != -1 ) {
			 str = str.substring(index + tag.length()); 
			 count++;
		}
		return count;
	}

转载：https://www.cnblogs.com/jiuchongxiao/p/5659884.html

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