我正在處理一個專案，但我無法找到一種方法來使從我的資料庫中列印出表格的頁面內容可下載。我希望有一個按鈕，讓客戶有機會以 pdf 或 csv 的形式下載表格的內容。這是servlet fo
package bacit.web.bacit_web;
import java.io.*;
import javax.servlet.*;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.*;
import java.sql.*;
@WebServlet(name = "BookingHistorikk", value = "/BookingHistorikk")
public class GetBookingHistorikk extends HttpServlet
{
public void doGet(HttpServletRequest req, HttpServletResponse res) throws IOException, ServletException
{
PrintWriter out = res.getWriter();
res.setContentType("text/html");
out.println("<html><body>");
try
{
Class.forName("org.mariadb.jdbc.Driver");
Connection con = DriverManager.getConnection("jdbc:mariadb:**********", "root", "pass");
Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery("select * from BOOKING");
out.println("<table style=text-align:center border=1 width=50% height=10% >");
out.println("<tr><th>Start Dato</th><th>Slutt Dato</th><th>Kommentar</th><th>Levert</th><th>Total Pris</th></tr>");
while (rs.next())
{
Date startDate = rs.getDate("StartDate");
Date endDate = rs.getDate("EndDate");
String cmnt = rs.getString("Cmnt");
Boolean isDelivered = rs.getBoolean("IsDelivered");
int totalPrice = rs.getInt("TotalPrice");
out.println("<tr><td>" startDate "</td><td>" endDate "</td><td>" cmnt "</td><td>" isDelivered "</td><td>" totalPrice "</td></tr>");
}
out.println("</table>");
out.println("</html></body>");
con.close();
}
catch (Exception e)
{
out.println("error");
}
}
}
uj5u.com熱心網友回復：
在這里你需要做兩件事......
- 創建 CSV 檔案。
- 在 的幫助下將其發送給用戶
HttpServletResponse。
您可以像這樣創建一個 CSV 檔案內容：
String getMyCsvFileAsString() {
StringBuilder sb = new StringBuilder();
sb.append("id");
sb.append(',');
sb.append("Name");
sb.append('\n');
sb.append("1");
sb.append(',');
sb.append("Prashant Ghimire");
sb.append('\n');
writer.write(sb.toString());
}
然后你可以像這樣將它附加到請求中：
public void doGet(HttpServletRequest request, HttpServletResponse response)
{
response.setContentType("text/csv");
response.setHeader("Content-Disposition", "attachment; filename=\"myCsvFile.csv\"");
try
{
OutputStream outputStream = response.getOutputStream();
// Get CSV file as string
String outputResult = getMyCsvFileAsString();
outputStream.write(outputResult.getBytes());
outputStream.flush();
outputStream.close();
}
catch(Exception e)
{
System.out.println(e.toString());
}
}
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