java 導出數據到Excel

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package invcompare;

import java.sql.Connection;
import java.sql.Statement;

import java.io.File;
import java.io.IOException;

import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;

import jxl.Workbook;
import jxl.write.Label;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;
import jxl.write.biff.RowsExceededException;

/**
 * <li>把數據導入到Excel公用類</li> </br> This is about
 * <code>ExcelUtil</code>
 *
 * @author hjy273
 * @version 1.0 @date Sep 6, 2008 9:52:52 PM
 */
public class ExcelUtil {

    LogInfo loginfo = new LogInfo();

    public ExcelUtil() {
    }

    public boolean DB2Excel(ResultSet rs, String filePath) {
        boolean flag = false;
        WritableWorkbook workbook = null;
        WritableSheet sheet = null;
        Label label = null;

        // 創建Excel表
        try {
            workbook = Workbook.createWorkbook(new File(filePath));
            //workbook = Workbook.createWorkbook(os);

            // 創建Excel表中的sheet
            sheet = workbook.createSheet("INV_WMS_SAP", 0);

            // 向Excel中添加數據
            ResultSetMetaData rsmd = rs.getMetaData();
            int columnCount = rsmd.getColumnCount();
            String colName = null;
            int row = 0;
            // 添加標題
            for (int i = 0; i < columnCount; i++) {
                colName = rsmd.getColumnName(i + 1);
                label = new Label(i, row, colName);
                // loginfo.appendLog("標題:"+i+"---"+row +"---"+ colName);
                sheet.addCell(label);
            }
            row++;

            while (rs.next()) {
                for (int i = 0; i < columnCount; i++) {
                    label = new Label(i, row, rs.getString(i + 1));
                    sheet.addCell(label);
                }
                row++;
            }
            //sheet.setRowView(0, 200);
            // 關閉文件
            workbook.write();
            workbook.close();
            workbook = null;
            flag = true;
        } catch (SQLException e) {
            loginfo.appendLog(e.getMessage());
        } catch (RowsExceededException e) {
            loginfo.appendLog(e.getMessage());
        } catch (WriteException e) {
            loginfo.appendLog(e.getMessage());
        } catch (IOException e) {
            loginfo.appendLog(e.getMessage());
        } finally {
            try {
                workbook.close();
            } catch (Exception e) {
            }
        }
        return flag;
    }

    /**
     * 測試方法
     *
     * @param args
     */
    public static void main(String[] args) {
        // write your code
        String url = "jdbc:oracle:thin:@100.100.100.100:1521:wms";
        String userName = "wmprod";
        String password = "wmprod";
        Connection conn;
        Statement stmt;
        ResultSet rset;


        try {
            try {
                Class<?> forName = Class.forName("oracle.jdbc.driver.OracleDriver");
            } catch (Exception e) {
                System.out.println("No Driver!");
            }
            // Connect to the database
            conn = DriverManager.getConnection(url, userName, password);
            // Create a Statement
            stmt = conn.createStatement();
            ResultSet rs = stmt.executeQuery("select * from vendor_master");
            if (!new ExcelUtil().DB2Excel(rs, "d:/1.xls")) {
                System.out.println("數據寫入失敗");
            }
            rs.close();
            stmt.close();
            conn.close();

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