java中的excel操作

导入jxl.jar包： 下载个jxl.jar包，然后这个包放在什么位置都行,在你的项目中导入这个包就可以.  
　具体做法:

　　项目上右键，点击“属性”，
　　类别那里选择”库“，点击"添加jar文件”
　　在弹出的文件选择对话框选择你的jxl.jar就OK了

 package publicData;

 /*
  * Created on 2013-12-5
  *
  * TODO To change the template for this generated file go to
  * Window - Preferences - Java - Code Style - Code Templates
  */

 import java.io.BufferedInputStream;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.text.DecimalFormat;
 import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Date;
 import java.util.List;

 import org.apache.poi.hssf.usermodel.HSSFCell;
 import org.apache.poi.hssf.usermodel.HSSFDateUtil;
 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;

 public class InputExcel {

     //public static String[][] result;

   /*
   public static void main(String[] args) {

     String path="C:\\Users\\pclxz\\Desktop\\心协软件\\初品4(在这修改)\\首访记录.xls";//文件路径
     try {
       File files = new File(path);
       String[][] result = getData(files, 2);
       if (result != null) {
         int rowLength = result.length;
         for (int i = 0; i < rowLength; i++) {
           for (int j = 0; j < result[i].length; j++) {
             System.out.println(result[i][j]+"单元格ID:"+i+" "+j);
           }
           System.out.println();
         }
       }
     } catch (Exception e) {
       e.printStackTrace();
     }
   }
   */

   public static void  getExcel(String[][] result, String path) {

       try {
           File files = new File(path);
           result = getData(files, 2);
         } catch (Exception e) {
           e.printStackTrace();
         }
   }

   public static String[][] getData(File file, int firstrow)
           throws FileNotFoundException, IOException {

     List<String[]> result = new ArrayList<String[]>();
     int rowSize = 0;
     BufferedInputStream in = new BufferedInputStream(new FileInputStream(file));
     POIFSFileSystem fs = new POIFSFileSystem(in);
     HSSFWorkbook wb = new HSSFWorkbook(fs);//工作表
     HSSFCell cell = null;
     //遍历工作表里的所有工作簿
     for (int sheetIndex = 0; sheetIndex < wb.getNumberOfSheets(); sheetIndex++) {

     HSSFSheet st = wb.getSheetAt(sheetIndex);    //得到工作簿
     //遍历工作簿st的row
     for (int rowIndex = firstrow; rowIndex <= st.getLastRowNum(); rowIndex++) {

       HSSFRow row = st.getRow(rowIndex);//row
       if (row == null) {
           continue;
       }

       //int tempRowSize = row.getLastCellNum() + 1;//该row的数组大小
       int tempRowSize = row.getLastCellNum() ;//该row的数组大小
       if (tempRowSize > rowSize) {
         rowSize = tempRowSize;
       }
     //System.out.println(rowSize);
     String[] values = new String[rowSize];//存放一个row的实例
     Arrays.fill(values, "");
     boolean hasValue = false;
     //读取一个row的实例并存放进values
     //System.out.println(row.getLastCellNum());
     for (short columnIndex = 0; columnIndex < row.getLastCellNum(); columnIndex++) {
       String value = "";
       cell = row.getCell(columnIndex);//row对应column的单元格cell
       //判断cell类型并相应存储
       if (cell != null) {
         switch (cell.getCellType()) {
         case HSSFCell.CELL_TYPE_STRING://读取的格式为字符串
           value = cell.getStringCellValue();
           break;
         case HSSFCell.CELL_TYPE_NUMERIC://读取的格式为数组
           //如果格式为日期格式，自定义格式输出
           if (HSSFDateUtil.isCellDateFormatted(cell)) {
             Date date = cell.getDateCellValue();
             if (date != null) {
               value = new SimpleDateFormat("yyyy-MM-dd")
                   .format(date);
             } else {
               value = "";
             }
           } else {
             //如果格式为数值，自定义格式输出
             value = new DecimalFormat("0.00").format(cell
                 .getNumericCellValue());
           }
           break;
         case HSSFCell.CELL_TYPE_FORMULA:
           // 导入时如果为公式生成的数据则无值
           value = "";
           break;
           // 导入时如果为空
         case HSSFCell.CELL_TYPE_BLANK:
           break;
         case HSSFCell.CELL_TYPE_ERROR:
           value = "";
           break;
           // 导入时如果为BOOLEAN型 自定义格式输出
         case HSSFCell.CELL_TYPE_BOOLEAN:
           value = (cell.getBooleanCellValue() == true ? "Y"
               : "N");
           break;
         default:
           value = "";
         }
       }

       values[columnIndex] = rightTrim(value);//去掉字符串右边的空格，并赋值
       hasValue = true;
     }

     //一个row的实例values存入result
     if (hasValue) {
       result.add(values);
     }

   }

   in.close();
   String[][] returnArray = new String[result.size()][rowSize];
   for (int i = 0; i < returnArray.length; i++) {
     returnArray[i] = (String[]) result.get(i);
   }
     return returnArray;
     }
   return null;

   }

   /**
    * 去掉字符串右边的空格
    *
    * @param str 要处理的字符串
    * @return 处理后的字符串
    */
   public static String rightTrim(String str) {
     if (str == null) {
       return "";
     }
     int length = str.length();
     for (int i = length - 1; i >= 0; i--) {
       if (str.charAt(i) != 0x20) {
         break;
       }
       length--;
     }
     return str.substring(0, length);
   }

 }