读取Excel文件内容

需要的jar是
poi-3.14.jar
poi-ooxml-3.14.jar
poi-ooxml-schemas-3.14.jar
xmlbeans-2.6.0.jar
可从https://download.csdn.net/download/samurai77/11014250 下载
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.DataFormatter;
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 java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.util.*;

public static void main(String[] args) throws FileNotFoundException {
        //
        //String filename = "D:/test/gggggg.xlsx";
        String filePath = "C:\\Users\\Duenan\\Desktop\\testvideo\\test.xlsx";
        String filename = "test.xlsx";

        // List<Map<String,Object>>  list = FileUtil.readExcelFileToMapList(filename, new FileInputStream(file), 2, true, 0,"Sheet1");

        List<Map<String,Object>> mapList = readExcelFileToMapList(filename,new FileInputStream(filePath),2,true,0,"Sheet1");
        for(Map<String,Object> mapObject : mapList){
            //System.out.println(mapObject);
            String key = String.valueOf(mapObject.keySet());
            String value = String.valueOf(mapObject.entrySet());
            String values [] = value.split(",");
            System.out.println("value="+value+"--------key="+key);
        }

    }
public static List<Map<String,Object>> readExcelFileToMapList(String filename, InputStream fileStream, int processStartRow, boolean processMaxData, int processRowNumber, String excelSheetName)
    {
        Row row;
        StringBuilder lineBuilder;
        Map<String,Object> map;
        List<Map<String,Object>> contentList = new ArrayList<>();
        Sheet sheet;
        int columnNumber;

        try
        {
            //Create Workbook instance for xlsx/xls file input stream
            Workbook workbook = null;

            if(filename.toLowerCase().endsWith("xlsx"))
                workbook = new XSSFWorkbook(fileStream);
            else
            if(filename.toLowerCase().endsWith("xls"))
                workbook = new HSSFWorkbook(fileStream);

            //Get the nth sheet from the workbook
            if ( excelSheetName == null || excelSheetName.trim().isEmpty() )
                sheet = workbook.getSheetAt(0);
            else
                sheet = workbook.getSheet(excelSheetName.trim());

            columnNumber = getSheetMaxColumnNumber(sheet);

            //every sheet has rows, iterate over them
            Iterator<Row> rowIterator = sheet.iterator();

            int i=1;

            while (rowIterator.hasNext() )
            {
                //Get the row object
                row = rowIterator.next();

                if ( i < processStartRow )
                {
                    i++;
                    continue;
                }

                DataFormatter formatter = new DataFormatter();

                lineBuilder = new StringBuilder();
                String strValue;

                for (int j = 0; j < columnNumber; j++)
                {
                    try
                    {
                        strValue = formatter.formatCellValue(row.getCell(j));
                        strValue = strValue.replace(ColumnSeparatorType.COMMA.getSeparator(), " ");
                    }
                    catch(Exception e)
                    {

                        strValue = "";
                    }

                    lineBuilder.append(strValue).append(ColumnSeparatorType.COMMA.getSeparator());
                }


                String newStr = lineBuilder.toString();
                if ( newStr.length()>1 )
                    newStr = newStr.substring(0,newStr.length()-1);

                map = new HashMap<>();
                map.put("index",i);
                map.put("line",newStr);
                map.put("originalLine",new String(newStr));
                contentList.add(map);

                if ( i == processStartRow+processRowNumber && processMaxData==false )
                    break;

                i++;

            } //end of rows iterator

            fileStream.close();
        }
        catch(Exception e)
        {

            return null;
        }

        return contentList;
    }
    public static int getSheetMaxColumnNumber(Sheet sheet)
    {
        Row row;
        int maxColumnNumber = 0;

        Iterator<Row> rowIterator = sheet.iterator();

        int i=1;

        while (rowIterator.hasNext() )
        {
            //Get the row object
            row = rowIterator.next();

            if ( row.getLastCellNum() > maxColumnNumber )
                maxColumnNumber = row.getLastCellNum();
        }

        return maxColumnNumber;
    }