需要匯入的jar包下載地址https://pan.baidu.com/s/16cTpUfx0KvKkbGYkXAUKMA

程式碼：ReadExcel.java

//信1605-3 20163432 張運濤

package domain;

import java.io.File;   

import java.io.FileInputStream;   
  
import java.io.InputStream;   
  
    
  
import jxl.Cell;   
  
import jxl.CellType;   
  
import jxl.Sheet;   
  
import
 
 jxl.Workbook;   
  
import jxl.write.Label;   
  
    
  
public class ReadExcel    
  
{   
  
    public static void main(String[] args)    
  
    {   
  
        jxl.Workbook readwb = null;   
  
        try    
  
        {   
  
           
  
            InputStream instream = new FileInputStream("C:\\Users\\lenovo\\Desktop\\測試.xls");   //
 
制定本地excel的檔案目錄
  
            readwb = Workbook.getWorkbook(instream);   
  
    
  
            //Sheet的下標是從0開始   
  
            //獲取第一張Sheet表   
  
            Sheet readsheet = readwb.getSheet(0);   
  
            //獲取Sheet表中所包含的總列數   
  
            int rsColumns = readsheet.getColumns();   
  
            
 
//獲取Sheet表中所包含的總行數   
  
            int rsRows = readsheet.getRows();   
  
            //獲取指定單元格的物件引用   
  
            for (int i = 0; i < rsRows; i++)   
  
            {   
  
                for (int j = 0; j < rsColumns; j++)   
  
                {   
  
                    Cell cell = readsheet.getCell(j, i);   
  
                    System.out.print(cell.getContents() + " ");   
  
                }   
  
                System.out.println("資料讀取結束");   
  
            }   
  
               
  
            //利用已經建立的Excel工作薄,建立新的可寫入的Excel工作薄   
  
            jxl.write.WritableWorkbook wwb = Workbook.createWorkbook(new File(   
  
                    "C:\\Users\\lenovo\\Desktop\\測試寫入.xls"), readwb);   
  
            //讀取第一張工作表   
  
            jxl.write.WritableSheet ws = wwb.getSheet(0);   
  
            //獲得第一個單元格物件   
  
            jxl.write.WritableCell wc = ws.getWritableCell(10, 5);   
  
            //判斷單元格的型別, 做出相應的轉化   
  
            if (wc.getType() == CellType.LABEL)    
  
            {   
  
                Label l = (Label) wc;   
  
                l.setString("新增加的內容");   
  
            }   
  
            //寫入Excel物件   
  
            wwb.write();   
  
            wwb.close();   
  
        } catch (Exception e) {   
  
            e.printStackTrace();   
  
        } finally {   
  
            readwb.close();   
  
        }   
  
}   
  
}   

執行效果