Java读取Excel内容

借助于apathe的poi.jar，由于上传文件不支持.jar所以请下载后将文件改为.jar，在应用程序中添加poi.jar包，并将需要读取的excel文件放入根目录即可

本例使用java来读取excel的内容并展出出结果，代码如下：

 

 

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 ExcelOperate {

 

    public static void main(String[] args) throws Exception {

       File file = new File("ExcelDemo.xls");

       String[][] result = getData(file, 1);

       int rowLength = result.length;

       for(int i=0;i<rowLength;i++) {

           for(int j=0;j<result[i].length;j++) {

              System.out.print(result[i][j]+"\t\t");

           }

           System.out.println();

       }

      

    }

    /**

     * 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++) {

           HSSFSheet st = wb.getSheetAt(sheetIndex);

           // 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: