急急急java poi 怎么导出execl

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");
}

}

数据源
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");
}

}
下面是导出生成EXCEL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,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())
{
List<String> list = new ArrayList<String>();
for(int i = 1;i <= columNumber;i++)
{
list.add(rs.getString(i));
}
createTableRow(list,(short)rowIndex);
rowIndex++;
}
}
/**
* 导出表格
* @param sheet
* @param os
* @throws IOException
*/
public void exportExcel(HSSFSheet sheet,OutputStream os) throws IOException
{
sheet.setGridsPrinted(true);
        HSSFFooter footer = sheet.getFooter();
        footer.setRight("Page " + HSSFFooter.page() + " of " +
        HSSFFooter.numPages());
        demoWorkBook.write(os);
}

public static void main(String[] args) {
String fileName = "D:\\世界五百强企业名次表.xls";
FileOutputStream fos = null;
        try {
         PoiDemo pd = new PoiDemo();
         pd.createExcelSheeet();
            fos = new FileOutputStream(fileName);
            pd.exportExcel(demoSheet,fos);
            JOptionPane.showMessageDialog(null, "表格已成功导出到 : "+fileName);
        } catch (Exception e) {
         JOptionPane.showMessageDialog(null, "表格导出出错，错误信息："+e+"\n错误原因可能是表格已经打开。");
         e.printStackTrace();
        } finally {
            try {
                fos.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
}
}

                //创建工作薄
HSSFWorkbook wb = new HSSFWorkbook();
//创建工作表
HSSFSheet sheet =wb.createSheet("公司受理案件统计");
//列宽
sheet.setColumnWidth((short)0, 5000);
sheet.setColumnWidth((short)1, 5000);
sheet.setColumnWidth((short)2, 5000);
sheet.setColumnWidth((short)3, 5000);
sheet.setColumnWidth((short)4, 5000);
sheet.setColumnWidth((short)5, 5000);
sheet.setColumnWidth((short)6, 5000);
sheet.setColumnWidth((short)7, 5000);
sheet.setColumnWidth((short)8, 5000);
//在表中建行
HSSFRow row = sheet.createRow(0);
HSSFCell cell[] = new HSSFCell[9];
for(short i=0; i<9; i++){
cell[i]=row.createCell(i);

}
cell[0].setCellValue("公司");
cell[1].setCellValue("待处理");
cell[2].setCellValue("立案处理中");
cell[3].setCellValue("已结案");
cell[4].setCellValue("已结案(信息不完整)");
cell[5].setCellValue("非客户投诉退回");
cell[6].setCellValue("退回修改");
cell[7].setCellValue("已归并");
cell[8].setCellValue("合计");                //将数据以Excel导出
                OutputStream sos = response.getOutputStream();
wb.write(sos);
sos.close();你可以在页面上定义一个按钮，然后让它跳转到你的action里的方法，方法里可以写如何导出excel，将你查出来的数据分别写入到你创建的Excel的单元格里。就OK了。

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调试易

急急急java poi 怎么导出execl

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