java用JXL读取excle文件(demo)示例代码

 
import java.io.File;
import java.util.*;
import jxl.*;
import jxl.write.*;
/**
* <p>Title: 操作EXCEL文件</p>
* <p>Description: 本实例演示使用jxl包实现对excel文件的操作</p>
* <p>Copyright: Copyright (c) 2003</p>
* <p>Filename: myExcel.java</p>
* @version 1.0
*/
public class myExcel{
Workbook workbook;
Sheet sheet;
/**
*<br>方法说明:写入文件操作
*<br>输入参数:
*<br>返回类型:
*/
public void write(){
    try{
        //创建一个可写入的excel文件对象
        WritableWorkbook workbook = Workbook.createWorkbook(new File("myfile.xls"));
        //使用第一张工作表,将其命名为“午餐记录”
        WritableSheet sheet = workbook.createSheet("午餐记录", 0);
        //表头                      列,行,内容
        Label label0 = new Label(0, 0, "时间");
        sheet.addCell(label0);
        Label label1 = new Label(1, 0, "姓名");
        sheet.addCell(label1);
        Label label2 = new Label(2, 0, "午餐标准");
        sheet.addCell(label2);
        Label label3 = new Label(3, 0, "实际费用");
        sheet.addCell(label3);
        //格式化日期
        jxl.write.DateFormat df = new jxl.write.DateFormat("yyyy-dd-MM hh:mm:ss");
        jxl.write.WritableCellFormat wcfDF = new jxl.write.WritableCellFormat(df);
        jxl.write.DateTime labelDTF = new jxl.write.DateTime(0, 1, new java.util.Date(), wcfDF);
        sheet.addCell(labelDTF);
        //普通字符
        Label labelCFC = new Label(1, 1, "riverwind");
        sheet.addCell(labelCFC);
         //格式化数字
        jxl.write.NumberFormat nf = new jxl.write.NumberFormat("#.##");
        WritableCellFormat wcfN = new WritableCellFormat(nf);
        jxl.write.Number labelNF = new jxl.write.Number(2, 1, 13.1415926, wcfN);
        sheet.addCell(labelNF);
       
        
        jxl.write.Number labelNNF = new jxl.write.Number(3, 1, 10.50001, wcfN);
        sheet.addCell(labelNNF);
        //关闭对象,释放资源
        workbook.write();
        workbook.close();

    }catch(Exception e){
      System.out.println(e);
    }
}
/**
*<br>方法说明:读取excel文件一行数据
*<br>输入参数:int row指定的行数
*<br>返回类型:String〔〕结果数组
*/
public String[] readLine(int row){
    try{
      //获取数据表列数
      int colnum = sheet.getColumns();
      String[] rest = new String[colnum];
      for(int i = 0; i < colnum; i++){
        String sTemp = read(i,row);
        if(sTemp!=null)
         rest[i] = sTemp;
      }
      return rest;
    }catch(Exception e){
      System.out.println("readLine err:"+e);
      workbook.close();
      return null;
    }
}
/**
*<br>方法说明:读取excel的指定单元数据
*<br>输入参数:
*<br>返回类型:
*/
public String read(int col, int row){
    try{
      //获得单元数据
      Cell a2 = sheet.getCell(col,row);
      String rest = a2.getContents();
      return rest;
    }catch(Exception e){
      System.out.println("read err:"+e);
      workbook.close();
      return null;
    }
}
/**
*<br>方法说明:主方法,演示程序用
*<br>输入参数:
*<br>返回类型:
*/
public static void main(String[] arges){
    try{
      myExcel me = new myExcel();
      me.write();
      //生成一个可读取的excel文件对象
      me.workbook = Workbook.getWorkbook(new File("myfile.xls"));
      //使用第一个工作表
      me.sheet = me.workbook.getSheet(0);
      //读一行记录,并显示出来
      String[] ssTemp = me.readLine(0);
     
      for(int i=0;i<ssTemp.length;i++)
       System.out.println(ssTemp[i]);
      //写入数据
      me.write();
     
      me.workbook.close();
    }catch(Exception e){
      System.out.println(e);
    }
}
  
}
附件里有jxl.jar.
 

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