Java操作Excel,Word

      POI, apache組織的一個開源項目，提供了對Microsoft excel,word 的純java
解決方案，http://jakarta.apache.org/poi/  裏面可以下載到開發包，還有例子程序，用起來還是很方便的！

下面是一個將Oracle數據庫表導出爲Excel的程序:

import java.io.FileOutputStream;
import org.apache.poi.hssf.usermodel.HSSFCell;      //單元格
import org.apache.poi.hssf.usermodel.HSSFCellStyle; //單元格樣式
import org.apache.poi.hssf.usermodel.HSSFDataFormat;//數據格式
import org.apache.poi.hssf.usermodel.HSSFFont;      //字體
import org.apache.poi.hssf.usermodel.HSSFHeader;    //頭  
import org.apache.poi.hssf.usermodel.HSSFRow;       //行
import org.apache.poi.hssf.usermodel.HSSFSheet;     //一張記事簿
import org.apache.poi.hssf.usermodel.HSSFWorkbook;  //一個excel
import org.apache.poi.hssf.util.HSSFColor;          //顏色
import java.sql.*;

 

public class Test{
    
     public static void main(String[] args) throws  Exception
     {
       String filename = "dept.xls";
       String column_name="";
       PreparedStatement ps=null;  //預編譯
       Connection conn=null;      //連接
       Statement smt=null;         //sql語句
       ResultSet rs = null,rs1=null;        //結果集合
       ResultSetMetaData md = null;         
      long rowCount =0l;               //總行數
        try{
      
        Class.forName("oracle.jdbc.driver.OracleDriver");
        }catch(Exception e){
         e.printStackTrace();
        }
        String url = "jdbc:oracle:thin:@172.18.2.114:1521:MIS";
        String userName = "scott";
        String password = "tiger";
        conn = DriverManager.getConnection (url, userName, password);
        smt = conn.createStatement();
       
        //取得總記錄數
        String sql="select deptno,dname,loc from dept";
        String sqlqeury="select count(*) as total from (  "+sql+"  )";
        try{
             rs = smt.executeQuery(sqlqeury);
             if(rs.next()){
                 rowCount =rs.getLong("total");
                 System.out.print(rowCount) ; //記錄總數
              }
          }catch(Exception e){
           System.out.print("aaa");
                 e.printStackTrace();
                 System.out.println(e.getMessage());
                 conn.close();   //異常後關閉連接
                 throw new Exception("獲得記錄總數失敗");
           }
        
         //處理sql語句
         try{
              rs1 = smt.executeQuery(sql);
              md = rs1.getMetaData();
               System.out.print(md.getColumnCount());
          }catch(Exception e){
            System.out.print("bbb");
                e.printStackTrace();
                System.out.println(e.getMessage());
                conn.close();   //異常後關閉連接
                throw new Exception("傳入的SQL無法處理");
         }
        
        
        //生成excel代碼
        HSSFWorkbook wb = new HSSFWorkbook();
        HSSFSheet sheet = wb.createSheet("new sheet");
        HSSFRow row = null;
        HSSFCell cell=null;
        for(long i =0;i<=rowCount;i++){
           
            row = sheet.createRow((short)i);                     //創建一個行
            for(int j =0;j<md.getColumnCount();j++){
             
               cell = row.createCell((short)j);                  //創建單元格
               cell.setEncoding(HSSFCell.ENCODING_UTF_16);
               if(i==0){   
                  cell.setCellValue(md.getColumnName(j+1));     //設定單元格的值
               }else{
                  cell.setCellValue(rs1.getString(j+1));        //設定單元格的值
                }
             }
             rs1.next();
         }
        //寫到excel中!
        FileOutputStream fileOut = new FileOutputStream(filename);
        wb.write(fileOut);          //向fileout文件寫
        fileOut.close();            //關閉文件輸出流
        conn.close();               //關閉正常連接  
   }
  
}