如何用java将数据库中的表导出到excel-java将数据导出excel,java数据导出为excel表格

用jxl来实现
import jxl.Cell;
import jxl.Sheet;
import jxl.Workbook;public String importEnter(HttpServletRequest request) {
Connection conn = null;
PreparedStatement ps = null;
OpenDbBean db = new OpenDbBean();
String message = "";
try {
ServletInputStream is = request.getInputStream();
byte[] junk = new byte[1024];
int bytesRead = 0;
//去掉浏览器发送的垃圾信息
bytesRead = is.readLine(junk, 0, junk.length);
bytesRead = is.readLine(junk, 0, junk.length);
bytesRead = is.readLine(junk, 0, junk.length);
bytesRead = is.readLine(junk, 0, junk.length);
Workbook workbook = Workbook.getWorkbook(is);
//取得第一个工作录
Sheet sheet = workbook.getSheet(0);
//从第二行开始取数据并处理
Enter enter = new Enter();
//连接数据库
conn = db.getConnection();
String sql =
"insert into haocai_enter(enter_id,enter_time,amount,jsr,type_id,xh)"
+ " values(s_enter_id.nextval,to_date(?,'dd/mm/yyyy'),?,?,?,?)";
ps = conn.prepareStatement(sql);
int okCount = 0;
ArrayList errorRows = new ArrayList();
for (int i = 1; i < sheet.getRows(); i++) {
DB mydb = new DB();
Cell[] c = sheet.getRow(i);
String type_id = enter.getTypeIdByPm(c[PM].getContents());
if (type_id != null) {
//设置入库数据
ps.setString(1, c[ENTER_TIME].getContents());
ps.setString(2, c[AMOUNT].getContents());
ps.setString(3, c[JSR].getContents());
ps.setString(4, type_id);
ps.setString(5, c[XH].getContents());
ps.addBatch();
okCount++;
} else {
message += "第" + i + "行 " + c[PM].getContents() + " 导入失败";
}
}
//执行该批过程
if (okCount > 0) {
ps.executeBatch();
}
message += "成功导入" + okCount + " 行";
workbook.close();
} catch (Exception e) {
System.out.println(e.getMessage());
message += "" + e.getMessage();
} finally {
try {
db.CleanConnection(conn, ps, null);
} catch (SQLException e1) {
e1.printStackTrace();
}
}
return message;
}

用jxl.jar或者poi都可以，poi可以到apache网站上去下。

利用Java 创建和读取Excel文档
为了保证示例7a64e4b893e5b19e335程序的运行，必须安装Java 2 sdk1.4.0 和Jakarta POI，Jakarta POI的Web站点是: http://jakarta.apache.org/poi/

示例1将演示如何利用Jakarta POI API 创建Excel 文档。

示例1程序如下：
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFCell;
import java.io.FileOutputStream;
public class CreateXL {
/** Excel 文件要存放的位置，假定在D盘JTest目录下*/
public static String outputFile="D:/JTest/ gongye.xls";
public static void main(String argv[])
{
try
{
// 创建新的Excel 工作簿
HSSFWorkbook workbook = new HSSFWorkbook();
// 在Excel工作簿中建一工作表，其名为缺省值
// 如要新建一名为"效益指标"的工作表，其语句为：
// HSSFSheet sheet = workbook.createSheet("效益指标");
HSSFSheet sheet = workbook.createSheet();
// 在索引0的位置创建行（最顶端的行）
HSSFRow row = sheet.createRow((short)0);
//在索引0的位置创建单元格（左上端）
HSSFCell cell = row.createCell((short) 0);
// 定义单元格为字符串类型
cell.setCellType(HSSFCell.CELL_TYPE_STRING);
// 在单元格中输入一些内容
cell.setCellValue("增加值");
// 新建一输出文件流
FileOutputStream fOut = new FileOutputStream(outputFile);
// 把相应的Excel 工作簿存盘
workbook.write(fOut);
fOut.flush();
// 操作结束，关闭文件
fOut.close();
System.out.println("文件生成...");

}catch(Exception e) {
System.out.println("已运行 xlCreate() : " + e );
}
}
}

读取Excel文档中的数据
示例2将演示如何读取Excel文档中的数据。假定在D盘JTest目录下有一个文件名为gongye.xls的Excel文件。
示例2程序如下：
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFCell;
import java.io.FileInputStream;
public class ReadXL {
/** Excel文件的存放位置。注意是正斜线*/
public static String fileToBeRead="D:/JTest/ gongye.xls";
public static void main(String argv[]){
try{
// 创建对Excel工作簿文件的引用
HSSFWorkbook workbook = new HSSFWorkbook(new FileInputStream(fileToBeRead));
// 创建对工作表的引用。
// 本例是按名引用（让我们假定那张表有着缺省名"Sheet1"）
HSSFSheet sheet = workbook.getSheet("Sheet1");
// 也可用getSheetAt(int index)按索引引用，
// 在Excel文档中，第一张工作表的缺省索引是0，
// 其语句为：HSSFSheet sheet = workbook.getSheetAt(0);
// 读取左上端单元
HSSFRow row = sheet.getRow(0);
HSSFCell cell = row.getCell((short)0);
// 输出单元内容，cell.getStringCellValue()就是取所在单元的值
System.out.println("左上端单元是： " + cell.getStringCellValue());
}catch(Exception e) {
System.out.println("已运行xlRead() : " + e );
}
}
}

设置单元格格式
在这里，我们将只介绍一些和格式设置有关的语句，我们假定workbook就是对一个工作簿的引用。在Java

中，第一步要做的就是创建和设置字体和单元格的格式，然后再应用这些格式：

1、创建字体，设置其为红色、粗体：
HSSFFont font = workbook.createFont();
font.setColor(HSSFFont.COLOR_RED);
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
2、创建格式
HSSFCellStyle cellStyle= workbook.createCellStyle();
cellStyle.setFont(font);
3、应用格式
HSSFCell cell = row.createCell((short) 0);
cell.setCellStyle(cellStyle);
cell.setCellType(HSSFCell.CELL_TYPE_STRING);
cell.setCellValue("标题 ");

总之，如本篇文章所演示的一样，Java程序员不必担心Excel工作表中的数据了，利用Jakarta POI API，

我们就可以轻易的在程序中存取Excel文档。

前段时间正好做了，导入和导出的，你自己看吧
/**导出数据为XLS格式
* @param fos
* @param bo
*/
public void writeExcelBo(FileOutputStream fos, java.util.Vector ve)
{
jxl.write.WritableWorkbook wwb;
try
{
wwb= Workbook.createWorkbook(fos);
jxl.write.WritableSheet ws= wwb.createSheet("booksheet", 10);
ws.addCell(new jxl.write.Label(0, 1, "书目ID"));
ws.addCell(new jxl.write.Label(1, 1, "ISBN"));
ws.addCell(new jxl.write.Label(2, 1, "定价"));
ws.addCell(new jxl.write.Label(3, 1, "书名"));
ws.addCell(new jxl.write.Label(4, 1, "原书名"));
ws.addCell(new jxl.write.Label(5, 1, "副题名"));
ws.addCell(new jxl.write.Label(6, 1, "著者"));
ws.addCell(new jxl.write.Label(7, 1, "译者"));
ws.addCell(new jxl.write.Label(8, 1, "版次"));
ws.addCell(new jxl.write.Label(9, 1, "出版地"));
ws.addCell(new jxl.write.Label(10, 1, "出版社"));
ws.addCell(new jxl.write.Label(11, 1, "出版日期"));
ws.addCell(new jxl.write.Label(12, 1, "页数"));
ws.addCell(new jxl.write.Label(13, 1, "书高"));
ws.addCell(new jxl.write.Label(14, 1, "装帧"));
ws.addCell(new jxl.write.Label(15, 1, "丛书名"));
ws.addCell(new jxl.write.Label(16, 1, "一般性附注项"));
ws.addCell(new jxl.write.Label(17, 1, "简介"));
ws.addCell(new jxl.write.Label(18, 1, "主题词"));
ws.addCell(new jxl.write.Label(19, 1, "中图法分类"));
ws.addCell(new jxl.write.Label(20, 1, "更新日期"));
ws.addCell(new jxl.write.Label(21, 1, "本数"));
book=new Book[ve.size()];
for (int i= 0; i < ve.size(); i++)
{
book[i]= (Book)ve.get(i);
ws.addCell(new jxl.write.Label(0, i + 2, "" + book[i].getBookId()));
ws.addCell(new jxl.write.Label(1, i + 2, book[i].getIsbn()));
ws.addCell(new jxl.write.Label(2, i + 2, "" + book[i].getPrice()));
ws.addCell(new jxl.write.Label(3, i + 2, book[i].getBookTitle()));
ws.addCell(new jxl.write.Label(4, i + 2, book[i].getOldFilename()));
ws.addCell(new jxl.write.Label(5, i + 2, book[i].getSubTitle()));
ws.addCell(new jxl.write.Label(6, i + 2, book[i].getWriter()));
ws.addCell(new jxl.write.Label(7, i + 2, book[i].getTranscribe()));
ws.addCell(new jxl.write.Label(8, i + 2, "" + book[i].getVersion()));
ws.addCell(new jxl.write.Label(9, i + 2, book[i].getPublishCity()));
ws.addCell(new jxl.write.Label(10, i + 2, book[i].getPublisher()));
ws.addCell(new jxl.write.Label(11, i + 2, book[i].getPublishDate().toString()));
ws.addCell(new jxl.write.Label(12, i + 2, "" + book[i].getPage()));
ws.addCell(new jxl.write.Label(13, i + 2, "" + book[i].getHight()));
ws.addCell(new jxl.write.Label(14, i + 2, book[i].getInstall()));
ws.addCell(new jxl.write.Label(15, i + 2, book[i].getSeries()));
ws.addCell(new jxl.write.Label(16, i + 2, book[i].getNotes()));
ws.addCell(new jxl.write.Label(17, i + 2, book[i].getPrecisnotes()));
ws.addCell(new jxl.write.Label(18, i + 2, book[i].getSubject()));
ws.addCell(new jxl.write.Label(19, i + 2, book[i].getCls().replaceAll("_", "")));
ws.addCell(new jxl.write.Label(20, i + 2, book[i].getUpdatedate().toString()));
ws.addCell(new jxl.write.Label(21, i + 2, "0"));
}
jxl.write.WritableFont wfc=
new jxl.write.WritableFont(
WritableFont.ARIAL,
255,
WritableFont.BOLD,
false,
UnderlineStyle.NO_UNDERLINE,
jxl.format.Colour.BLACK);
jxl.write.WritableCellFormat wcfFC= new jxl.write.WritableCellFormat(wfc);
ws.addCell(new jxl.write.Label(0, 0, "为保证您提交定单的稳定和正确，导入定单时候请勿更改此表格式（请勿更改书目ID,订购本数自行添e799bee5baa6e79fa5e98193e78988e69d83366加！）"));
wwb.write();
//关闭Excel工作薄对象
wwb.close();
} catch (IOException e)
{} catch (RowsExceededException e)
{} catch (WriteException e)
{}
}

//导入EXCEL
if (f.getName().indexOf(".xls") > 0)
{
try
{
fis= new FileInputStream(f);
BookBean bob= new BookBean();
UserBean usb= new UserBean();
jxl.Workbook rwb= Workbook.getWorkbook(fis);
jxl.Sheet sh= rwb.getSheet(0);
int rowCount= sh.getRows();
SimpleDateFormat sdf= new SimpleDateFormat("dd/MM/yyyy");
book= new Book[rowCount - 1];
for (int i= 1; i < rowCount; i++)
{
book[i - 1]= new Book();
jxl.Cell[] ce= sh.getRow(i);
book[i - 1].setIsbn(ce[0].getContents().toString());
book[i - 1].setSeries(ce[1].getContents().toString());
book[i - 1].setBookTitle(ce[2].getContents().toString());
book[i - 1].setWriter(ce[3].getContents().toString());
book[i - 1].setTranscribe(ce[4].getContents().toString());
book[i - 1].setPublisher(ce[5].getContents().toString());
book[i - 1].setPublishDate(sdf.parse(ce[6].getContents().toString(), new ParsePosition(0)));
book[i-1].setVersion(Integer.parseInt(ce[7].getContents().toString()));
book[i-1].setPage(Integer.parseInt(ce[8].getContents().toString()));
book[i-1].setCls(ce[9].getContents().toString());
book[i-1].setPrecisnotes(ce[10].getContents().toString());
book[i-1].setInstall(ce[11].getContents().toString());
book[i-1].setPrice(Float.parseFloat(ce[12].getContents().toString()));
book[i-1].setUserid(usb.getUser().getUserid());
getVector().addElement(book[i - 1]);
}
rwb.close();
fis.close();
} catch (FileNotFoundException e)
{} catch (BiffException e)
{} catch (IOException e)
{} catch (NumberFormatException e)
{
ShowMessage("数据导入失败，请按照本软件要求的EXCEL格式导入定单");
}
}

这个我会留下你的企蛾号