我通过点击按钮将jqgrid中显示的数据导出到.excel文件中。 这是我导出到excel按钮的代码点击..
$('#excel').click(function(){
var fromdate=$('#fromdate').val();
var todate=$('#todate').val();
if(fromdate && todate)
{
var URL='excel.jsp?fromdate='+$('#fromdate').val()+'&todate='+$('#todate').val();
$.ajax({
url:URL,
type:'GET',
success:function(data){
alert('Exported To Excel');
}
});
}
});
现在这个按钮将指向excel.jsp页面.Below是我的excel.jsp页面代码，它直接提供了将生成的.excel文件保存在本地磁盘中的路径D：//.Now Asper当用户点击时我需要在导出到excel按钮时，一个openwith并保存为对话框，弹出窗口，使用户能够给出所需的名称并保存到所需的位置..
excel.jsp
String datum1 = request.getParameter("fromdate");
String datum2 = request.getParameter("todate");
SimpleDateFormat sdfSource = new SimpleDateFormat("dd-MM-yyyy");
Date date = sdfSource.parse(datum1);
Date date2 = sdfSource.parse(datum2);
SimpleDateFormat sdfDestination = new SimpleDateFormat("yyyy-MM-dd");
datum1 = sdfDestination.format(date);
System.out.println(datum1);
datum2 = sdfDestination.format(date2);
System.out.println(datum2);
String filename = "d:/excel.xls";
HSSFWorkbook hwb = new HSSFWorkbook();
HSSFSheet sheet = hwb.createSheet("CallBillingSystem");
HSSFRow rowhead = sheet.createRow((short) 0);
rowhead.createCell((short) 0).setCellValue("calldate");
rowhead.createCell((short) 1).setCellValue("src");
rowhead.createCell((short) 2).setCellValue("dst");
rowhead.createCell((short) 3).setCellValue("dstchannel");
rowhead.createCell((short) 4).setCellValue("lastapp");
rowhead.createCell((short) 5).setCellValue("duration");
rowhead.createCell((short) 6).setCellValue("disposition");
rowhead.createCell((short) 7).setCellValue("amaflags");
rowhead.createCell((short) 8).setCellValue("cdrcost");
String strQuery = "";
ResultSet rs = null;
conexion conexiondb = new conexion();
conexiondb.Conectar();
strQuery = "SELECT * FROM cdrcost where date(calldate) between '" + datum1 + "' and '" + datum2 + "'";
rs = conexiondb.Consulta(strQuery);
int i = 1;
while (rs.next()) {
HSSFRow row = sheet.createRow((short) i);
row.createCell((short) 0).setCellValue(rs.getString("calldate"));
row.createCell((short) 1).setCellValue(rs.getString("src"));
row.createCell((short) 2).setCellValue(rs.getString("dst"));
row.createCell((short) 3).setCellValue(rs.getString("dstchannel"));
row.createCell((short) 4).setCellValue(rs.getString("lastapp"));
row.createCell((short) 5).setCellValue(rs.getString("duration"));
row.createCell((short) 6).setCellValue(rs.getString("disposition"));
row.createCell((short) 7).setCellValue(rs.getString("amaflags"));
row.createCell((short) 8).setCellValue(rs.getString("cdrcost"));
i++;
}
FileOutputStream fileOut = new FileOutputStream(filename);
hwb.write(fileOut);
fileOut.close();
System.out.println("Your excel file has been generated!");
} catch (Exception ex) {
System.out.println(ex);
}
答案 0 :(得分：2)
您应该设置多个HTTP标头并将Excel文件的内容直接写入HttpServletResponse的OutputStream。
response.setHeader("Content-Type", "application/vnd.ms-excel");
response.setHeader("Content-Transfer-Encoding", "binary");
response.setHeader("Content-Length", String.valueOf(fileSize));
response.addHeader("Content-Disposition", String.format("attachment; filename=%s", fileName));
“Content-Type”标头告诉您要向浏览器发送的流的类型。 Mime类型取决于Excel文件的格式。请参阅What is correct content-type for excel files?。
“Content-Length”不是强制性的，但它允许浏览器显示下载进度。
“Content-Disposition”告诉浏览器初始文件名保存为（无路径）。
使用此标题的响应会自动在浏览器中打开“另存为...”对话框，或根据您的浏览器设置立即开始下载到“下载”文件夹。
另外考虑使用servlet而不是JSP： import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.OutputStream; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;
public class ExcelServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
File tempFile = File.createTempFile(getClass().getName(), ".xls");
try {
FileOutputStream fos = new FileOutputStream(tempFile);
try {
generateExcel(fos);
} finally {
fos.close();
}
response.setHeader("Content-Type", "application/vnd.ms-excel");
response.setHeader("Content-Transfer-Encoding", "binary");
response.setHeader("Content-Length", String.valueOf(tempFile.length()));
response.addHeader("Content-Disposition", String.format("attachment; filename=%s", tempFile.getName()));
OutputStream outputStream = response.getOutputStream();
FileInputStream fis = new FileInputStream(tempFile);
try {
int n = 0;
byte[] buffer = new byte[1024];
while ((n = fis.read(buffer)) != -1) {
outputStream.write(buffer, 0, n);
}
outputStream.flush();
} finally {
fis.close();
}
} finally {
tempFile.delete();
}
}
private void generateExcel(OutputStream outputStream) throws IOException {
// TODO This is stub. Place you excel generation code here
outputStream.write("Hellol, world!".getBytes());
}
}
<强>更新 您无法使用jQuery.ajax函数以我描述的方式下载文件。我通常使用隐藏的iframe：
$('#excel').click(function(){
var fromdate = $('#fromdate').val();
var todate = $('#todate').val();
if(fromdate && todate) {
var url = 'excel?fromdate=' + fromdate + '&todate=' + todate;
$('#download-frame').attr('src', url);
}
});
包含在您的网页标记中：
<iframe id="download-frame" src="" width="1" height="1" style="display: none"></iframe>
答案 1 :(得分：-1)
在java中的下载文件的浏览器中获取保存对话框：
而不是使用＆＃39; onclick（）＆＃39;功能，只需使用href =＆＃34;＆＃34;。
<script type="text/javascript" charset="utf-8">
var contextPath = "<%=request.getContextPath()%>";
</script>
var downloadUrl=contextPath+"/web/cms/downloadDocument.html?docId=" +docId;
<a> href='"+downloadUrl+"'>Download <a>