JavaScript Upload & Download

发布时间:2020-08-08 18:05:23 作者:fesir
来源:ITPUB博客 阅读:323
http://www.blogjava.net/hawk8359/archive/2008/02/19/180623.html[@more@]
JavaScript Upload & Download{
JavaScript Upload & DownloadJavaScript Upload & Download
/**//*
JavaScript Upload & Download * 把数据库中的字段导入到Excel ,并生成Excel文档
JavaScript Upload & Download *
*/

JavaScript Upload & Download
public ActionForward getDownload(ActionMapping actionMapping,
JavaScript Upload & Download ActionForm actionForm, HttpServletRequest request,
JavaScript Upload & DownloadJavaScript Upload & Download HttpServletResponse response)
throws Exception JavaScript Upload & Download{
JavaScript Upload & Download Form fm
= (Form) actionForm;
JavaScript Upload & Download
// Excel 文件存放在服务器的相对路径下
JavaScript Upload & Download
String outputFile = request.getRealPath("/tmp/Excel.xls");
JavaScript Upload & Download
JavaScript Upload & DownloadJavaScript Upload & Download
tryJavaScript Upload & Download{
JavaScript Upload & Download
// 创建新的Excel 工作簿
JavaScript Upload & Download
HSSFWorkbook workbook =new HSSFWorkbook();
JavaScript Upload & Download
// 在Excel 工作簿中建一工作表
JavaScript Upload & Download
HSSFSheet sheet = workbook.createSheet("Sheet1");
JavaScript Upload & Download
// 设置单元格格式(文本)
JavaScript Upload & Download
HSSFCellStyle cellStyle = workbook.createCellStyle();
JavaScript Upload & Download cellStyle.setDataFormat(HSSFDataFormat.getBuiltinFormat(
"@"));
JavaScript Upload & Download
JavaScript Upload & Download
// 在索引0的位置创建行(第一行)
JavaScript Upload & Download
HSSFRow row = sheet.createRow((short) 0);
JavaScript Upload & Download
JavaScript Upload & Download HSSFCell cell1
= row.createCell((short) 0);// 第一列
JavaScript Upload & Download
HSSFCell cell2 = row.createCell((short) 1);
JavaScript Upload & Download HSSFCell cell3
= row.createCell((short) 2);
JavaScript Upload & Download
// 定义单元格为字符串类型
JavaScript Upload & Download
cell1.setCellType(HSSFCell.CELL_TYPE_STRING);
JavaScript Upload & Download cell2.setCellType(HSSFCell.CELL_TYPE_STRING);
JavaScript Upload & Download cell3.setCellType(HSSFCell.CELL_TYPE_STRING);
JavaScript Upload & Download
JavaScript Upload & Download cell1.setEncoding(HSSFCell.ENCODING_UTF_16);
JavaScript Upload & Download cell2.setEncoding(HSSFCell.ENCODING_UTF_16);
JavaScript Upload & Download cell3.setEncoding(HSSFCell.ENCODING_UTF_16);
JavaScript Upload & Download
// 在单元格中输入数据
JavaScript Upload & Download
cell1.setCellValue("姓名");
JavaScript Upload & Download cell2.setCellValue(
"性别");
JavaScript Upload & Download cell3.setCellValue(
"年龄");
JavaScript Upload & Download
JavaScript Upload & Download Connection connection
= session.connection();
JavaScript Upload & Download
JavaScript Upload & Download String sql
="Select t.name, t.sex, t.age from table t where t.sex = ?";
JavaScript Upload & Download
JavaScript Upload & DownloadJavaScript Upload & Download
tryJavaScript Upload & Download{
JavaScript Upload & Download PreparedStatement ps
= connection.prepareStatement(sql);
JavaScript Upload & Download ps.setString(
1, fm.getSex());// 传入查询条件
JavaScript Upload & Download
ResultSet rs = ps.executeQuery();// 查询结果存入rs
JavaScript Upload & Download
connection.commit();// 执行SQL
JavaScript Upload & Download

JavaScript Upload & DownloadJavaScript Upload & Download
while (rs.next()) JavaScript Upload & Download{
JavaScript Upload & Download
//设置j行从第二行开始
JavaScript Upload & Download
int j =1;
JavaScript Upload & Download row
= sheet.createRow((short) j);
JavaScript Upload & Download
//设置i列从第二列开始
JavaScript Upload & DownloadJavaScript Upload & Download
for (int i =1; i <=3; i++) JavaScript Upload & Download{
JavaScript Upload & Download HSSFCell cell
= row.createCell((short) (i-1));
JavaScript Upload & Download
// 设置单元格格式
JavaScript Upload & Download
cell.setCellStyle(cellStyle);
JavaScript Upload & Download cell.setCellType(HSSFCell.CELL_TYPE_STRING);
JavaScript Upload & Download cell.setEncoding(HSSFCell.ENCODING_UTF_16);
JavaScript Upload & Download cell.setCellValue(rs.getString(i));
JavaScript Upload & Download }

JavaScript Upload & Download
JavaScript Upload & Download j
++;
JavaScript Upload & Download }

JavaScript Upload & Download
JavaScript Upload & Download request.setAttribute(
"message", "文件生成成功!");
JavaScript Upload & DownloadJavaScript Upload & Download }
catch (SQLException e) JavaScript Upload & Download{
JavaScript Upload & Download request.setAttribute(
"message", "创建文件失败!");
JavaScript Upload & Download e.printStackTrace();
JavaScript Upload & Download }

JavaScript Upload & Download
// 删除路径下同名的Excel 文件
JavaScript Upload & Download
File path =new File(outputFile);
JavaScript Upload & Download path.delete();
JavaScript Upload & Download
JavaScript Upload & Download
// 新建一输出文件流
JavaScript Upload & Download
FileOutputStream fOut =new FileOutputStream(outputFile);
JavaScript Upload & Download
// 把相应的Excel 工作簿存盘
JavaScript Upload & Download
workbook.write(fOut);
JavaScript Upload & Download
// 操作结束,关闭文件
JavaScript Upload & Download
fOut.flush();
JavaScript Upload & Download fOut.close();
JavaScript Upload & Download
//该处如果Excel过大会影响效率,谁有好的想法可以提出来参考(不过从页面下载完后就会清空)
JavaScript Upload & Download
request.getSession().setAttribute("Download", outputFile);
JavaScript Upload & Download
JavaScript Upload & DownloadJavaScript Upload & Download }
catch (Exception ioexception) JavaScript Upload & Download{
JavaScript Upload & Download request.setAttribute(
"message", "创建文件失败!");
JavaScript Upload & Download
return actionMapping.findForward("outJSP");
JavaScript Upload & Download }

JavaScript Upload & Download
JavaScript Upload & Download
return actionMapping.findForward("outJSP");
JavaScript Upload & Download }

JavaScript Upload & Download
JavaScript Upload & DownloadJavaScript Upload & Download
/**//*
JavaScript Upload & Download * 从Excel文件中读取数据,并导入到数据库中
JavaScript Upload & Download *
*/

JavaScript Upload & Download
public ActionForward getUpload(ActionMapping actionMapping,
JavaScript Upload & Download ActionForm actionForm, HttpServletRequest request,
JavaScript Upload & DownloadJavaScript Upload & Download HttpServletResponse response)
throws Exception JavaScript Upload & Download{
JavaScript Upload & Download
// 获取excel 文件
JavaScript Upload & Download
Form fm = (Form) actionForm;
JavaScript Upload & Download FormFile formfile
= fm.getUploadfile();
JavaScript Upload & Download InputStream inputstream
= formfile.getInputStream();
JavaScript Upload & Download fm.clear();
// 清空
JavaScript Upload & Download
Session session = HibernateSession.currentSession();
JavaScript Upload & Download ArrayList list
=new ArrayList();
JavaScript Upload & Download
int input =0; //导入记数
JavaScript Upload & Download
String name =null;
JavaScript Upload & Download String sex
=null;
JavaScript Upload & Download String age
=null;
JavaScript Upload & Download
JavaScript Upload & DownloadJavaScript Upload & Download
tryJavaScript Upload & Download{
JavaScript Upload & Download
//通过得到的文件输入流inputstream创建一个HSSFWordbook对象
JavaScript Upload & Download
HSSFWorkbook hssfworkbook =new HSSFWorkbook(inputstream);
JavaScript Upload & Download HSSFSheet hssfsheet
= hssfworkbook.getSheetAt(0);//第一个工作表
JavaScript Upload & Download
HSSFRow hssfrow = hssfsheet.getRow(0);//第一行
JavaScript Upload & Download
JavaScript Upload & Download
//遍历该表格中所有的工作表,i表示工作表的数量 getNumberOfSheets表示工作表的总数
JavaScript Upload & DownloadJavaScript Upload & Download
for (int i =0; i < hssfworkbook.getNumberOfSheets(); i++) JavaScript Upload & Download{
JavaScript Upload & Download hssfsheet
= hssfworkbook.getSheetAt(i);
JavaScript Upload & Download
JavaScript Upload & Download
//遍历该行所有的行,j表示行数 getPhysicalNumberOfRows行的总数
JavaScript Upload & DownloadJavaScript Upload & Download
for (int j =1; j < hssfsheet.getPhysicalNumberOfRows(); j++) JavaScript Upload & Download{
JavaScript Upload & Download hssfrow
= hssfsheet.getRow(j);
JavaScript Upload & Download
//判断是否还存在需要导入的数据
JavaScript Upload & DownloadJavaScript Upload & Download
if (hssfrow ==null) JavaScript Upload & Download{
JavaScript Upload & Download System.out.println(
"这里已没有数据,在第"+i+"列,第"+j+"");
JavaScript Upload & Download
break;
JavaScript Upload & Download }

JavaScript Upload & DownloadJavaScript Upload & Download
/** *//**将EXCEL中的第 j 行,第一列的值插入到实例中*/
JavaScript Upload & DownloadJavaScript Upload & Download
if (hssfrow.getCell((short) 0) ==null) JavaScript Upload & Download{
JavaScript Upload & Download name
="";
JavaScript Upload & DownloadJavaScript Upload & Download }
elseif (hssfrow.getCell((short) 0).getCellType() ==0) JavaScript Upload & Download{
JavaScript Upload & Download name
=new Double(hssfrow.getCell((short) 0).getNumericCellValue()).toString();
JavaScript Upload & Download }

JavaScript Upload & Download
//如果EXCEL表格中的数据类型为字符串型
JavaScript Upload & DownloadJavaScript Upload & Download
elseJavaScript Upload & Download{
JavaScript Upload & Download name
= hssfrow.getCell((short) 0).getStringCellValue().trim();
JavaScript Upload & Download }

JavaScript Upload & DownloadJavaScript Upload & Download
/** *//**将EXCEL中的第 j 行,第二列的值插入到实例中*/
JavaScript Upload & Download
//姓名
JavaScript Upload & DownloadJavaScript Upload & Download
if(hssfrow.getCell((short) 1) ==null)JavaScript Upload & Download{
JavaScript Upload & Download sex
="";
JavaScript Upload & DownloadJavaScript Upload & Download }
elseif(hssfrow.getCell((short) 1).getCellType() ==0) JavaScript Upload & Download{
JavaScript Upload & Download sex
=new Double(hssfrow.getCell((short) 1).getNumericCellValue()).toString();
JavaScript Upload & Download }

JavaScript Upload & Download
//如果EXCEL表格中的数据类型为字符串型
JavaScript Upload & DownloadJavaScript Upload & Download
elseJavaScript Upload & Download{
JavaScript Upload & Download sex
= hssfrow.getCell((short) 1).getStringCellValue().trim();
JavaScript Upload & Download }

JavaScript Upload & DownloadJavaScript Upload & Download
/** *//**将EXCEL中的第 j 行,第三列的值插入到实例中*/
JavaScript Upload & Download
//姓名
JavaScript Upload & DownloadJavaScript Upload & Download
if(hssfrow.getCell((short) 1) ==null)JavaScript Upload & Download{
JavaScript Upload & Download age
="";
JavaScript Upload & DownloadJavaScript Upload & Download }
elseif(hssfrow.getCell((short) 1).getCellType() ==0) JavaScript Upload & Download{
JavaScript Upload & Download

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