從jsp頁表獲取價值
[英]Getting value from jsp page table
問題描述
我想從jsp頁表中獲取值，並使用reservations.jsp插入數據庫。 下面的代碼我可以在表格中獲得名為“Buy”的選項部分打印出數據庫，但我無法在表中獲得activityId部分。 它在數據庫中返回null。 在reservations.jsp中不要讀取actvityId1。 我認為問題出在activityid1部分，代碼不包括像“name ='buy'”這樣的代碼。 如何獲得activityId1值？
music.jsp
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@ page import ="java.sql.*" %>
<!DOCTYPE html>
<html>
<body background="http://www.teamarking.com/barcode/bar_background.jpg">
<form method="post" action="reservations.jsp">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Book Ticket</title>
</head>
<center>
<table border="1" width="30%" height="30%">
<th><font color='#D18603'>ActivityID</font>
<th><font color='#D18603'>Type</font></th>
<th><font color='#D18603'>Description</font></th>
<th><font color='#D18603'>City</font></th>
<th><font color='#D18603'>Location</font></th>
<th><font color='#D18603'>Date</font></th>
<th><font color='#D18603'>Price</font></th>
<th><font color='#D18603'>Buy</font>
<form action="some.jsp">
</tr>
<form method="post">
<%
Class.forName("org.apache.derby.jdbc.ClientDriver").newInstance();
Connection con = DriverManager.getConnection("jdbc:derby://localhost:1527/users", "users", "123");
Statement st = con.createStatement();
ResultSet rs;
rs = st.executeQuery("select * from activities where type='müzik'");
while (rs.next()) {
String activityid1 = rs.getString("id");
String type1 = rs.getString("type");
String description1 = rs.getString("description");
String city1 = rs.getString("city");
String location1 = rs.getString("location");
String date1 = rs.getString("date");
String price1 = rs.getString("price");
out.println("<tr>");
out.println("<td>" + activityid1 + "</td>");
out.println("<td>" + type1 + "</td>");
out.println("<td>" + description1 + "</td>");
out.println("<td>" + city1 + "</td>");
out.println("<td>" + location1 + "</td>");
out.println("<td>" + date1 + "</td>");
out.println("<td>" + price1 + "</td>");
out.println("<td><b><form action='reservations.jsp'><select name='buy'><option value='1'>1</option><option value='2'>2</option><option value='3'>3</option><option value='4'>4</option><option value='5'>5</option></select><input type='submit' value='Submit'></form></b>");
out.println("</tr>");
}
st.close();
%>
</center>
</table>
<tr>
<td><input type="reset" value="Reset" /></td>
</tr>
</form>
<br><br><a href='logout.jsp'>Log out</a>
</form>
</body>
</html>
reservations.jsp
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@ page import ="java.sql.*" %>
<%
request.getParameter("activityid1");
request.getParameter("buy");
String username = (String) request.getSession().getAttribute("username");
Class.forName("org.apache.derby.jdbc.ClientDriver").newInstance();
Connection con = DriverManager.getConnection("jdbc:derby://localhost:1527/users", "users", "123");
String sorgu = "INSERT INTO reservation(id,username,buy) VALUES ('" + activityid1 + "', '" + username + "','" + request.getParameter("buy") + "') ";
java.sql.Statement st = con.createStatement();
int rowNum = st.executeUpdate(sorgu);
response.sendRedirect("paypal.html");
st.close();
%>
1 個解決方案
解決方案1
0 2016-12-28 18:54:22
activityid1不是表單的一部分。 它的值不隨請求一起發送。 您需要將其添加為表單的隱藏元素：
out.println("<td><b><form action='reservations.jsp'><select name='buy'><option value='1'>1</option><option value='2'>2</option><option value='3'>3</option><option value='4'>4</option><option value='5'>5</option></select><input type='submit' value='Submit'> <input type=\"hidden\" id=\"activityid1Value\" name=\"activityid1Hidden\" value=\""+activityid1 +"\"></form></b>");
並檢索它：
request.getParameter("activityid1Hidden");
希望我幫助你
從jsp頁面獲取參數值
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