jxl 操作 excel 比较好的例子

import java.io.File;  
import java.io.FileOutputStream;  
import java.io.OutputStream;  
import java.util.ArrayList;  
import java.util.Date;  
 
import jxl.Cell;  
import jxl.CellType;  
import jxl.Sheet;  
import jxl.Workbook;  
import jxl.WorkbookSettings;  
import jxl.format.Alignment;  
import jxl.format.Border;  
import jxl.format.BorderLineStyle;  
import jxl.format.Colour;  
import jxl.format.VerticalAlignment;  
import jxl.write.Formula;  
import jxl.write.Label;  
import jxl.write.NumberFormat;  
import jxl.write.WritableCellFeatures;  
import jxl.write.WritableCellFormat;  
import jxl.write.WritableFont;  
import jxl.write.WritableSheet;  
import jxl.write.WritableWorkbook;  
import jxl.write.WriteException;  
 
public class JExcelUtils {  
 
    /** 
     * 生成Excel文件 
     * @param path         文件路径 
     * @param sheetName    工作表名称 
     * @param dataTitles   数据标题 
     */ 
   public void createExcelFile(String path,String sheetName,String[] dataTitles){  
       WritableWorkbook workbook;  
       try{  
           OutputStream os=new FileOutputStream(path);   
           workbook=Workbook.createWorkbook(os);   
 
           WritableSheet sheet = workbook.createSheet(sheetName, 0); //添加第一个工作表  
           initialSheetSetting(sheet);  
             
           Label label;  
           for (int i=0; i<dataTitles.length; i++){  
               //Label(列号,行号,内容,风格)  
               label = new Label(i, 0, dataTitles[i],getTitleCellFormat());   
               sheet.addCell(label);   
           }  
 
           //插入一行  
           insertRowData(sheet,1,new String[]{"200201001","张三","100","60","100","260"},getDataCellFormat(CellType.STRING_FORMULA));  
             
           //一个一个插入行  
           label = new Label(0, 2,"200201002",getDataCellFormat(CellType.STRING_FORMULA));   
           sheet.addCell(label);  
             
           label = new Label(1, 2,"李四",getDataCellFormat(CellType.STRING_FORMULA));   
           sheet.addCell(label);  
             
           insertOneCellData(sheet,2,2,70.5,getDataCellFormat(CellType.NUMBER));  
           insertOneCellData(sheet,3,2,90.523,getDataCellFormat(CellType.NUMBER));  
           insertOneCellData(sheet,4,2,60.5,getDataCellFormat(CellType.NUMBER));  
 
           insertFormula(sheet,5,2,"C3+D3+E3",getDataCellFormat(CellType.NUMBER_FORMULA));  
             
           //插入日期  
           mergeCellsAndInsertData(sheet, 0, 3, 5, 3, new Date(), getDataCellFormat(CellType.DATE));  
             
           workbook.write();   
           workbook.close();  
       }catch(Exception e){  
           e.printStackTrace();  
       }  
   }  
     
   /** 
    * 初始化表格属性 
    * @param sheet 
    */ 
   public void initialSheetSetting(WritableSheet sheet){  
      try{  
           //sheet.getSettings().setProtected(true); //设置xls的保护，单元格为只读的  
           sheet.getSettings().setDefaultColumnWidth(10); //设置列的默认宽度  
           //sheet.setRowView(2,false);//行高自动扩展   
           //setRowView(int row, int height);--行高   
           //setColumnView(int  col,int width); --列宽  
           sheet.setColumnView(0,20);//设置第一列宽度  
      }catch(Exception e){  
          e.printStackTrace();  
      }  
   }  
     
   /** 
    * 插入公式 
    * @param sheet 
    * @param col 
    * @param row 
    * @param formula 
    * @param format 
    */ 
   public void insertFormula(WritableSheet sheet,Integer col,Integer row,String formula,WritableCellFormat format){  
       try{  
           Formula f = new Formula(col, row, formula, format);  
           sheet.addCell(f);  
       }catch(Exception e){  
           e.printStackTrace();  
       }  
   }  
     
   /** 
    * 插入一行数据 
    * @param sheet       工作表 
    * @param row         行号 
    * @param content     内容 
    * @param format      风格 
    */ 
   public void insertRowData(WritableSheet sheet,Integer row,String[] dataArr,WritableCellFormat format){  
       try{  
           Label label;  
           for(int i=0;i<dataArr.length;i++){  
               label = new Label(i,row,dataArr[i],format);  
               sheet.addCell(label);  
           }  
       }catch(Exception e){  
           e.printStackTrace();  
       }  
   }  
     
   /** 
    * 插入单元格数据 
    * @param sheet 
    * @param col 
    * @param row 
    * @param data 
    */ 
   public void insertOneCellData(WritableSheet sheet,Integer col,Integer row,Object data,WritableCellFormat format){  
       try{  
           if(data instanceof Double){  
               jxl.write.Number  labelNF = new jxl.write.Number(col,row,(Double)data,format);   
               sheet.addCell(labelNF);   
           }else if(data instanceof Boolean){  
               jxl.write.Boolean labelB = new jxl.write.Boolean(col,row,(Boolean)data,format);   
               sheet.addCell(labelB);   
           }else if(data instanceof Date){  
               jxl.write.DateTime labelDT = new jxl.write.DateTime(col,row,(Date)data,format);   
               sheet.addCell(labelDT);   
               setCellComments(labelDT, "这是个创建表的日期说明！");  
           }else{  
               Label label = new Label(col,row,data.toString(),format);  
               sheet.addCell(label);                 
           }  
       }catch(Exception e){  
           e.printStackTrace();  
       }  
 
  }  
     
   /** 
    * 合并单元格，并插入数据 
    * @param sheet 
    * @param col_start 
    * @param row_start 
    * @param col_end 
    * @param row_end 
    * @param data 
    * @param format 
    */ 
   public void mergeCellsAndInsertData(WritableSheet sheet,Integer col_start,Integer row_start,Integer col_end,Integer row_end,Object data, WritableCellFormat format){  
      try{  
          sheet.mergeCells(col_start,row_start,col_end,row_end);//左上角到右下角  
          insertOneCellData(sheet, col_start, row_start, data, format);  
      }catch(Exception e){  
          e.printStackTrace();  
      }  
 
   }  
     
   /** 
    * 给单元格加注释 
    * @param label 
    * @param comments 
    */ 
   public void setCellComments(Object label,String comments){  
       WritableCellFeatures cellFeatures = new WritableCellFeatures();  
       cellFeatures.setComment(comments);  
       if(label instanceof jxl.write.Number){  
           jxl.write.Number num = (jxl.write.Number)label;  
           num.setCellFeatures(cellFeatures);  
       }else if(label instanceof jxl.write.Boolean){  
           jxl.write.Boolean bool = (jxl.write.Boolean)label;  
           bool.setCellFeatures(cellFeatures);  
       }else if(label instanceof jxl.write.DateTime){  
           jxl.write.DateTime dt = (jxl.write.DateTime)label;  
           dt.setCellFeatures(cellFeatures);  
       }else{  
           Label _label = (Label)label;  
           _label.setCellFeatures(cellFeatures);  
       }  
   }  
     
   /** 
   * 读取excel 
   * @param inputFile 
   * @param inputFileSheetIndex 
   * @throws Exception 
   */ 
   public ArrayList<String> readDataFromExcel(File inputFile, int inputFileSheetIndex){  
      ArrayList<String> list = new ArrayList<String>();  
      Workbook book = null;  
      Cell cell = null;  
      WorkbookSettings setting = new WorkbookSettings();   
      java.util.Locale locale = new java.util.Locale("zh","CN");   
      setting.setLocale(locale);  
      setting.setEncoding("ISO-8859-1");  
      try{  
          book = Workbook.getWorkbook(inputFile, setting);  
      }catch(Exception e){  
          e.printStackTrace();    
      }  
 
      Sheet sheet = book.getSheet(inputFileSheetIndex);  
      for (int rowIndex = 0; rowIndex < sheet.getRows(); rowIndex++) {//行  
       for (int colIndex = 0; colIndex < sheet.getColumns(); colIndex++) {//列  
           cell = sheet.getCell(colIndex, rowIndex);  
           //System.out.println(cell.getContents());  
           list.add(cell.getContents());  
       }  
      }  
      book.close();  
 
      return list;  
   }  
 
   /** 
    * 得到数据表头格式 
    * @return 
    */ 
   public WritableCellFormat getTitleCellFormat(){  
       WritableCellFormat wcf = null;  
       try {  
           //字体样式  
           WritableFont wf = new WritableFont(WritableFont.TIMES,12, WritableFont.NO_BOLD,false);//最后一个为是否italic  
           wf.setColour(Colour.RED);  
           wcf = new WritableCellFormat(wf);  
           //对齐方式  
           wcf.setAlignment(Alignment.CENTRE);  
           wcf.setVerticalAlignment(VerticalAlignment.CENTRE);  
           //边框  
           wcf.setBorder(Border.ALL,BorderLineStyle.THIN);  
             
           //背景色  
           wcf.setBackground(Colour.GREY_25_PERCENT);  
       } catch (WriteException e) {  
        e.printStackTrace();  
       }  
       return wcf;  
   }  
     
   /** 
    * 得到数据格式 
    * @return 
    */ 
   public WritableCellFormat getDataCellFormat(CellType type){  
       WritableCellFormat wcf = null;  
       try {  
           //字体样式  
           if(type == CellType.NUMBER || type == CellType.NUMBER_FORMULA){//数字  
              NumberFormat nf = new NumberFormat("#.00");  
              wcf = new WritableCellFormat(nf);   
           }else if(type == CellType.DATE || type == CellType.DATE_FORMULA){//日期  
               jxl.write.DateFormat df = new jxl.write.DateFormat("yyyy-MM-dd hh:mm:ss");   
               wcf = new jxl.write.WritableCellFormat(df);   
           }else{  
               WritableFont wf = new WritableFont(WritableFont.TIMES,10, WritableFont.NO_BOLD,false);//最后一个为是否italic  
               wcf = new WritableCellFormat(wf);  
           }  
           //对齐方式  
           wcf.setAlignment(Alignment.CENTRE);  
           wcf.setVerticalAlignment(VerticalAlignment.CENTRE);  
           //边框  
           wcf.setBorder(Border.LEFT,BorderLineStyle.THIN);  
           wcf.setBorder(Border.BOTTOM,BorderLineStyle.THIN);  
           wcf.setBorder(Border.RIGHT,BorderLineStyle.THIN);  
           //背景色  
           wcf.setBackground(Colour.WHITE);  
             
           wcf.setWrap(true);//自动换行  
             
       } catch (WriteException e) {  
        e.printStackTrace();  
       }  
       return wcf;  
   }  
     
   /** 
    * 打开文件看看 
    * @param exePath 
    * @param filePath 
    */ 
   public void openExcel(String exePath,String filePath){  
       Runtime r=Runtime.getRuntime();   
       String cmd[]={exePath,filePath};   
       try{   
           r.exec(cmd);   
       }catch(Exception e){  
           e.printStackTrace();  
       }  
   }  
     
   public static void main(String[] args){  
       String[] titles = {"学号","姓名","语文","数学","英语","总分"};   
       JExcelUtils jxl = new JExcelUtils();  
       String filePath = "E:/test.xls";  
       jxl.createExcelFile(filePath,"成绩单",titles);  
       jxl.readDataFromExcel(new File(filePath),0);  
       jxl.openExcel("C:/Program Files/Microsoft Office/OFFICE11/EXCEL.EXE",filePath);  
   }  
}