Java讀取Excel中的數據

所需jar包：http://download.csdn.net/source/2599529

package com.jCuckoo.Excel;
import java.io.FileInputStream;     
import java.io.FileNotFoundException;     
import java.io.IOException;     
import java.io.InputStream;     
import java.util.Date;     
import java.util.HashMap;     
import java.util.Map;     
    
import org.apache.poi.hssf.usermodel.HSSFCell;     
import org.apache.poi.hssf.usermodel.HSSFRow;     
import org.apache.poi.hssf.usermodel.HSSFSheet;     
import org.apache.poi.hssf.usermodel.HSSFWorkbook;     
import org.apache.poi.poifs.filesystem.POIFSFileSystem;     
    
/**   
 * 操作Excel表格的功能類   
 * @author：   
 * @version 1.0   
 */    
public class ExcelReader {     
    private POIFSFileSystem fs;     
    private HSSFWorkbook wb;     
    private HSSFSheet sheet;     
    private HSSFRow row;     
    /**   
     * 讀取Excel表格表頭的內容   
     * @param InputStream   
     * @return String 表頭內容的數組   
     *    
     */    
    public String[] readExcelTitle(InputStream is) {     
        try {     
            fs = new POIFSFileSystem(is);     
            wb = new HSSFWorkbook(fs);     
        } catch (IOException e) {     
            e.printStackTrace();     
        }     
        sheet = wb.getSheetAt(0);     
        row = sheet.getRow(0);     
        //標題總列數     
        int colNum = row.getPhysicalNumberOfCells();     
        String[] title = new String[colNum];     
        for (int i=0; i<colNum; i++) {     
            title[i] = getStringCellValue(row.getCell((short) i));     
        }     
        return title;     
    }     
         
    /**   
     * 讀取Excel數據內容   
     * @param InputStream   
     * @return Map 包含單元格數據內容的Map對象   
     */    
    public Map<Integer,String> readExcelContent(InputStream is) {     
        Map<Integer,String> content = new HashMap<Integer,String>();     
        String str = "";     
        try {     
            fs = new POIFSFileSystem(is);     
            wb = new HSSFWorkbook(fs);     
        } catch (IOException e) {     
            e.printStackTrace();     
        }     
        sheet = wb.getSheetAt(0);     
        //得到總行數     
        int rowNum = sheet.getLastRowNum();     
        row = sheet.getRow(0);     
        int colNum = row.getPhysicalNumberOfCells();     
        //正文內容應該從第二行開始,第一行爲表頭的標題     
        for (int i = 1; i <= rowNum; i++) {     
            row = sheet.getRow(i);     
            int j = 0;     
            while (j<colNum) {     
        //每個單元格的數據內容用"-"分割開，以後需要時用String類的replace()方法還原數據     
        //也可以將每個單元格的數據設置到一個javabean的屬性中，此時需要新建一個javabean     
                str += getStringCellValue(row.getCell((short) j)).trim() + "-";     
                j ++;     
            }     
            content.put(i, str);     
            str = "";     
        }     
        return content;     
    }     
         
    /**   
     * 獲取單元格數據內容爲字符串類型的數據   
     * @param cell Excel單元格   
     * @return String 單元格數據內容   
     */    
    private String getStringCellValue(HSSFCell cell) {     
        String strCell = "";     
        switch (cell.getCellType()) {     
        case HSSFCell.CELL_TYPE_STRING:     
            strCell = cell.getStringCellValue();     
            break;     
        case HSSFCell.CELL_TYPE_NUMERIC:     
            strCell = String.valueOf(cell.getNumericCellValue());     
            break;     
        case HSSFCell.CELL_TYPE_BOOLEAN:     
            strCell = String.valueOf(cell.getBooleanCellValue());     
            break;     
        case HSSFCell.CELL_TYPE_BLANK:     
            strCell = "";     
            break;     
        default:     
            strCell = "";     
            break;     
        }     
        if (strCell.equals("") || strCell == null) {     
            return "";     
        }     
        if (cell == null) {     
            return "";     
        }     
        return strCell;     
    }     
         
    /**   
     * 獲取單元格數據內容爲日期類型的數據   
     * @param cell Excel單元格   
     * @return String 單元格數據內容   
     */    
    private String getDateCellValue(HSSFCell cell) {     
        String result = "";     
        try {     
            int cellType = cell.getCellType();     
            if (cellType == HSSFCell.CELL_TYPE_NUMERIC) {     
                Date date = cell.getDateCellValue();     
                result = (date.getYear() + 1900) + "-" + (date.getMonth() + 1)      
                + "-" + date.getDate();     
            } else if (cellType == HSSFCell.CELL_TYPE_STRING) {     
                String date = getStringCellValue(cell);     
                result = date.replaceAll("[年月]", "-").replace("日", "").trim();     
            } else if (cellType == HSSFCell.CELL_TYPE_BLANK) {     
                result = "";     
            }     
        } catch (Exception e) {     
            System.out.println("日期格式不正確!");     
            e.printStackTrace();     
        }     
        return result;     
    }     
         
    public static void main(String[] args) {     
        try {     
            //對讀取Excel表格標題測試     
            InputStream is = new FileInputStream("C://Excel表格測試.xls");     
            ExcelReader excelReader = new ExcelReader();     
            String[] title = excelReader.readExcelTitle(is);
          
            System.out.println("獲得Excel表格的標題:");     
            for (String s : title) {     
                System.out.print(s + " ");     
            }     
           
            System.out.println();    
            //對讀取Excel表格內容測試     
            InputStream is2 = new FileInputStream("C://Excel表格測試.xls");     
            Map<Integer,String> map = excelReader.readExcelContent(is2);     
            System.out.println("獲得Excel表格的內容:");     
            for (int i=1; i<=map.size(); i++) {     
                System.out.println(map.get(i));     
            }     
        } catch (FileNotFoundException e) {     
            System.out.println("未找到指定路徑的文件!");     
            e.printStackTrace();     
        }     
    }     
}