/**
 * 提供了常用的Excel读取和写入的方法
 * <p> * Title: * </p>
 * <p> * Description: * </p>
 * <p> * Copyright: Copyright (c) 2006 * </p>
 * <p> * Company: * </p>
 *  * @author wujiaqian * @version 1.0
 */

public class Excel {
 int sheetCount = 1; // excel工作簿，默认为1

 WritableWorkbook wwb = null; // 构建Workbook对象,只读Workbook对象

 Vector vSheet = null;

 /**
  * 无参构造函数，生成默认名字的excel文件
  */
 public Excel() {
  this("noName.excel");
 }

 /**
  * 带有一个String类型参数的构造函数
  *
  * @param fileName
  * String 将要生成的excel文件名
  */
 public Excel(String fileName) {
  try {
   wwb = Workbook.createWorkbook(new File(fileName));
   vSheet = new Vector(5);
  } catch (Exception e) {
  }
 }

 /**
  * 带有一个File类型参数的构造函数
  *
  * @param fileName
  *  String 将要生成的excel文件名
  */
 public Excel(File file) {
  try {
   wwb = Workbook.createWorkbook(file);
   vSheet = new Vector(5);
  } catch (Exception e) {
  }
 }

 /**
  * 读取一个EXCEL文件的所有行和列,在同一行上的数据以一个String的形式保存在Vector中,各列数据以","号分割
  *
  * @param fileName
  *        String 文件名
  * @throws Exception
  * @return Vector
  */
 public static Vector readFromExcel(String fileName) throws Exception {
  Vector v = new Vector();
  File file = new File(fileName);
  if (!file.isFile()) {
   return null;
  }
  v = readExl(file, -1, -1);
  return v;
 }

 public static Vector readFromExcel(File file) throws Exception {
  Vector v = new Vector();
  if (!file.isFile()) {
   return null;
  }
  v = readExl(file, -1, -1);
  return v;
 }

 /**
  * 读取一行多列或者一列多行
  *
  * @param fileName
  *        String 文件名
  * @param rowORcol
  *        int 第几行或者第几列
  * @param flag
  *        String ROW表示前面一个参数的值指的是行数，行COL表示前面一个参数的值指的是列数
  * @throws Exception
  * @return Vector
  */
 public static Vector readFromExcel(String fileName, int rowORcol,
   String flag) throws Exception {
  Vector v = new Vector();
  File file = new File(fileName);
  if (!file.isFile()) {
   return null;
  }
  if (flag != null && flag.equals("ROW")) {
   v = readExl(file, rowORcol, -1);
  } else if (flag != null && flag.equals("COL")) {
   v = readExl(file, -1, rowORcol);
  } else {
   return null;
  }
  return v;
 }

 public static Vector readFromExcel(File file, int rowORcol, String flag)
   throws Exception {
  Vector v = new Vector();
  if (!file.isFile()) {
   return null;
  }
  if (flag != null && flag.equals("ROW")) {
   v = readExl(file, rowORcol, -1);
  } else if (flag != null && flag.equals("COL")) {
   v = readExl(file, -1, rowORcol);
  } else {
   return null;
  }

  return v;
 }

 /**
  * 读取多行或者多列,可以任意挑选几行或几列
  *
  * @param fileName
  *        String 文件名
  * @param rowORcol
  *        int 任意的行或列
  * @param flag
  *        String ROW表示行COL表示列
  * @throws Exception
  * @return Vector
  */
 public static Vector readFromExcel(String fileName, int[] rowORcol,
   String flag) throws Exception {
  Vector v = new Vector();
  return v;
 }

 public static Vector readFromExcel(File file, int[] rowORcol, String flag)
   throws Exception {
  Vector v = new Vector();
  return v;
 }

 /**
  * 读取第几行第几列的一个数据
  *
  * @param fileName
  *            String
  * @param row
  *            int
  * @param col
  *            int
  * @throws Exception
  * @return String
  */
 public static String readFromExcel(String fileName, int row, int col)
   throws Exception {
  String res = null;
  File file = new File(fileName);
  if (!file.isFile()) {
   return null;
  }
  return res;
 }

 public static String readFromExcel(File file, int row, int col)
   throws Exception {
  String res = null;
  if (!file.isFile()) {
   return null;
  }

  return res;
 }

 /**
  * 读取xls文件
  *
  * @param f
  *        File 文件
  * @param row
  *        int 读取从0到row行
  * @param col
  *        int 读取从0到col列
  * @throws Exception
  * @return Vector
  */

 private static Vector readExl(File f, int row, int col) throws Exception {
  Vector v = new Vector();
  Workbook wb = null;
  Sheet st = null;
  wb = Workbook.getWorkbook(f);
  st = wb.getSheet(0);
  int allRow = st.getRows();
  if (row == -1) {
   row = allRow;
  }
  int allCol = st.getColumns();
  if (col == -1) {
   col = allCol;
  }
  for (int i = 0; i < row; i++) {
   String sRow = null;
   for (int j = 0; j < col; j++) {
    Cell c1 = st.getCell(j, i);
    String sCol = c1.getContents();
    if (j == 0) {
     sRow = sCol;
    } else {
     if (sCol != null) {
      sRow = sRow + "," + sCol;
     } else {
      sRow = sRow + "," + "";
     }
    }
    c1 = null;
    sCol = null;
   }
   v.addElement(sRow);
   sRow = null;
  }

  st = null;
  wb.close();
  wb = null;
  return v;
 }

 public void addSheet() throws Exception {
  addSheet(String.valueOf(sheetCount));
 }

 public void addSheet(String sheetName) throws Exception {

  // 创建Excel工作表
  WritableSheet ws = wwb.createSheet(sheetName, sheetCount);
  vSheet.addElement(ws);
  sheetCount++;
 }

 /**
  * 为工作表添加内容,指定添加到第几列
  *
  * @param v
  *        Vector 要添加到工作表的内容 格式
  *        String,String,String,String,...,...,...,..., 每列内容以逗号隔开
  * @param col
  *        int 指定列数
  * @throws Exception
  */
 public void addContent(Vector v, int col) throws Exception {
  WritableSheet ws = (WritableSheet) vSheet.get(sheetCount - 2);

  int size = v.size();
  try {
   for (int i = 0; i < size; i++) {
    String s = (String) v.get(i);
    String[] s1 = s.split(",");
    for (int j = 0; j < col; j++) {
     Label label = new Label(j, i, s1[j]);

     ws.addCell(label);
     label = null;
    }
   }
  } catch (ArrayIndexOutOfBoundsException e) {
   throw new ArrayIndexOutOfBoundsException("check column!");
  }
  ws = null;
 }

 /**
  * 为工作表添加内容,不指定添加几列
  *
  * @param v
  *        Vector 要添加到工作表的内容 格式
  *        String,String,String,String,...,...,...,..., 每列内容以逗号隔开
  * @throws Exception
  */
 public void addContent(Vector v) throws Exception {
  WritableSheet ws = (WritableSheet) vSheet.get(sheetCount - 2);

  int size = v.size();
  try {
   for (int i = 0; i < size; i++) {
    String s = (String) v.get(i);
    String[] s1 = s.split(",");
    int col_size = s1.length;
    for (int j = 0; j < col_size; j++) {
     Label label = new Label(j, i, s1[j]);

     ws.addCell(label);
     label = null;
    }
   }
  } catch (Exception e) {
   throw new Exception();
  }
  ws = null;
 }

 /**
  * 为工作表添加内容,不指定添加几列
  *
  * @param rs
  *        ResultSet 从数据库中得到的结果集
  * @throws Exception
  */
 public void addContent(ResultSet rs) throws Exception {
  if (rs == null) {
   return;
  }
  WritableSheet ws = (WritableSheet) vSheet.get(sheetCount - 2);
  ResultSetMetaData rsMetaD = rs.getMetaData();
  int col = rsMetaD.getColumnCount();
  int i = 0;
  while (rs.next()) {
   for (int j = 0; j < col; j++) {
    Label label = new Label(j, i, rs.getString(j));// Chinese.fromDatabase(rs.getString(j))
    ws.addCell(label);
    label = null;
   }
   i++;
  }
 }

 /**
  * 最终生成excel文件
  *
  * @throws Exception
  */
 public void createExcel() throws Exception {
  wwb.write();
  wwb.close();
 }

 public static void main(String[] args) {
  Excel t = new Excel("d:\\test.xls");
  Vector v = new Vector();
  try {
   v.addElement("ding,wen,yuan");
   v.addElement("ding,wen,yuan");
   t.addSheet("first");
   t.addContent(v, 3);

   v.clear();
   v.addElement("xuhy,hai,yong");
   v.addElement("xuhy,hai,yong");
   t.addSheet("second");
   t.addContent(v, 3);

   v.clear();
   v.addElement("wu,jia,qian");
   v.addElement("wu,jia,qian");
   t.addSheet("third");
   t.addContent(v, 3);

   t.createExcel();
  } catch (Exception e) {
   e.printStackTrace();
  }

 }

}

转自:http://www.blogjava.net/wujiaqian/archive/2006/12/21/89308.html?Pending=true#Post