用POI把数据导出为Excel

代码
package com.javaeye.yongsky;

import java.sql.*;
import java.util.*;

import com.microsoft.jdbc.*;

public class SheetDataSource {

private static Connection con ;

private static final String DatabaseName = "POIDEMO";

private static final String userName = "sa";

private static final String password = "123";

public SheetDataSource()
{
try {
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
try {
con = DriverManager.getConnection("jdbc:microsoft:sqlserver://127.0.0.1:1433;DatabaseName="+DatabaseName,userName,password);
} catch (SQLException e) {
e.printStackTrace();
}
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}

public static ResultSet selectAllDataFromDB() throws SQLException
{
new SheetDataSource();
Statement stmt = con.createStatement();
return stmt.executeQuery("select * from COMPANY");
}

}

<script type="text/javascript">render_code();</script>
上面部分代码主要是从数据库里面取出数据，作为Excel的数据源．

（二）PoiDemo．java

代码
package com.javaeye.yongsky;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.*;

import javax.swing.JOptionPane;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFFooter;
import org.apache.poi.hssf.usermodel.HSSFHeader;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;

public class PoiDemo {

//表头
public static final String[] tableHeader = {"企业中文名","所属国家","企业英文名","2003年排名","2004年排名","2005年排名",
"2006年排名","2007年排名","主要业务","2003年营业额","2004年营业额","2005年营业额","2006年营业额","2007年营业额","企业编号","名次升降",
"图片","状况"};
//创建工作本
public static HSSFWorkbook demoWorkBook = new HSSFWorkbook();
//创建表
public static HSSFSheet demoSheet = demoWorkBook.createSheet("The World's 500 Enterprises");
//表头的单元格个数目
public static final short cellNumber = (short)tableHeader.length;
//数据库表的列数
public static final int columNumber = 18;
/**
* 创建表头
* @return
*/
public static void createTableHeader()
{
HSSFHeader header = demoSheet.getHeader();
header.setCenter("世界五百强企业名次表");
HSSFRow headerRow = demoSheet.createRow((short) 0);
for(int i = 0;i < cellNumber;i++)
{
HSSFCell headerCell = headerRow.createCell((short) i);
headerCell.setEncoding(HSSFCell.ENCODING_UTF_16);
headerCell.setCellValue(tableHeader[i]);
}
}
/**
* 创建行
* @param cells
* @param rowIndex
*/
public static void createTableRow(List<string> cells,</string>short rowIndex)
{
//创建第rowIndex行
HSSFRow row = demoSheet.createRow((short) rowIndex);
for(short i = 0;i < cells.size();i++)
{
//创建第i个单元格
HSSFCell cell = row.createCell((short) i);
cell.setEncoding(HSSFCell.ENCODING_UTF_16);
cell.setCellValue(cells.get(i));
}
}

/**
* 创建整个Excel表
* @throws SQLException
*
*/
public static void createExcelSheeet() throws SQLException
{
createTableHeader();
ResultSet rs = SheetDataSource.selectAllDataFromDB();
int rowIndex = 1;
while(rs.next())
{