apache poi读取excel（03版本之前）

一：首先导入如下三个poi包：

上述三个包下载地址：http://download.csdn.net/detail/wangzihu/8420333

二：示例代码

package com.lenovo.storage.web.util;
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;

import com.lenovo.storage.common.model.admin.StorageAssetInfo;
import com.lenovo.storage.dao.StorageDaoFactory;
public class ExcelToData{
    public static void main(String[] args) throws Exception {
       File file = new File("E:/test.xls");
       String[][] result = getData(file, 1);
       int rowLength = result.length;
       List<Object> addList = new ArrayList<Object>();
       for(int i=0;i<rowLength;i++){
    	   StorageAssetInfo sa=new StorageAssetInfo();
    	   sa.setProductname(result[i][0]);//资产名称
    	   sa.setProducttime(result[i][1]);//资本化日期
    	   sa.setProductid(result[i][2]);//资产序列号
    	   sa.setComment(result[i][3]);//资产其它描述
    	   sa.setStatus(1);
    	   addList.add(sa);
              System.out.print(result[i][0]+"\t\t");
              System.out.print(result[i][1]+"\t\t");
              System.out.print(result[i][2]+"\t\t");
              System.out.println();
       }
       int endResult=StorageDaoFactory.getCommonDao().importExcelDataToasset(addList);
       System.out.println("listSize:"+addList.size()+"------insertResult:"+endResult);
       if(endResult>0){
    	   System.err.println("插入成功，共插入"+endResult+"条数据");
       }
    }
    /**
     * 读取Excel的内容，第一维数组存储的是一行中格列的值，二维数组存储的是多少个行
     * @param file 读取数据的源Excel
     * @param ignoreRows 读取数据忽略的行数，比喻行头不需要读入 忽略的行数为1
     * @return 读出的Excel中数据的内容
     * @throws FileNotFoundException
     * @throws IOException
     */
    public static String[][] getData(File file, int ignoreRows)
           throws FileNotFoundException, IOException {
       List<String[]> result = new ArrayList<String[]>();
       int rowSize = 0;
       BufferedInputStream in = new BufferedInputStream(new FileInputStream(file));
       // 打开HSSFWorkbook
       POIFSFileSystem fs = new POIFSFileSystem(in);
       HSSFWorkbook wb = new HSSFWorkbook(fs);
       HSSFCell cell = null;
      //for(int sheetIndex = 0; sheetIndex < wb.getNumberOfSheets(); sheetIndex++) {//判断有几个sheet,循环显示这些sheet对应的excel值
          // HSSFSheet st = wb.getSheetAt(sheetIndex);
    	   HSSFSheet st = wb.getSheetAt(0);//读取第一个sheet
    	// 第一行为标题，不取
           for (int rowIndex = ignoreRows; rowIndex <= st.getLastRowNum(); rowIndex++) {
              HSSFRow row = st.getRow(rowIndex);
              if (row == null) {
                  continue;
              }
              int tempRowSize = row.getLastCellNum() + 1;
              if (tempRowSize > rowSize) {
                  rowSize = tempRowSize;
              }
              String[] values = new String[rowSize];
              Arrays.fill(values, "");
              boolean hasValue = false;
              for (short columnIndex = 0; columnIndex <= row.getLastCellNum(); columnIndex++) {
                  String value = "";
                  cell = row.getCell(columnIndex);
                  if (cell != null) {
                	// 注意：一定要设成这个，否则可能会出现乱码
                     cell.setEncoding(HSSFCell.ENCODING_UTF_16);
                     switch (cell.getCellType()) {
                     case HSSFCell.CELL_TYPE_STRING:
                         value = cell.getStringCellValue();
                         break;
                     case HSSFCell.CELL_TYPE_NUMERIC:
                         if (HSSFDateUtil.isCellDateFormatted(cell)) {
                            Date date = cell.getDateCellValue();
                            if (date != null) {
                                value = new SimpleDateFormat("yyyy-MM-dd").format(date);
                            } else {
                                value = "";
                            }
                         } else {
                            value = new DecimalFormat("0").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
                         if (!cell.getStringCellValue().equals("")) {
                            value = cell.getStringCellValue();
                         } else {
                            value = cell.getNumericCellValue() + "";
                         }
                         break;
                     case HSSFCell.CELL_TYPE_BLANK:
                         break;
                     case HSSFCell.CELL_TYPE_ERROR:
                         value = "";
                         break;
                     case HSSFCell.CELL_TYPE_BOOLEAN:
                         value = (cell.getBooleanCellValue() == true ? "Y":"N");
                         break;
                     default:
                         value = "";
                     }
                  }
                  if (columnIndex == 0 && value.trim().equals("")) {
                     break;
                  }
                  values[columnIndex] = rightTrim(value);
                  hasValue = true;
              }
              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;
    }

    /**
     * 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);
    }
}