使用JSP获取文本框的值

我正在创建购物门户。在此门户网站中，我有一个购物车页面，用于显示所选物品的文本字段，用于输入所需数量。我使用cart.jsp中的while循环对它们进行了编号。我正在检索bill.jsp中的这些值。我得到第一个值，但其他值也与第一个值相同，而不是我们给出的值。有谁知道发生了什么问题？使用JSP获取文本框的值

cart.jsp

<html> 
<head> 
<meta name="generator" content="HTML Tidy for Linux (vers 25 March 2009), see www.w3.org"> 
<title>Shopping cart</title> 

<style type="text/css"> 
         * { font-size: 12px; font-family: Verdana } 
</style> 
<base href="%3C%=basePath%%3E"> 
<title>My JSP 'bill.jsp' starting page</title> 
<meta http-equiv="pragma" content="no-cache"> 
<meta http-equiv="cache-control" content="no-cache"> 
<meta http-equiv="expires" content="0"> 
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
<meta http-equiv="description" content="This is my page"> 
</head> 
<body> 
<img src="images/add.png" onclick="document.location='index.jsp'" alt="** PLEASE DESCRIBE THIS IMAGE **"> <img src="images/remove.png" onclick="document.location='remove.jsp'" alt="** PLEASE DESCRIBE THIS IMAGE **"> <img src="images/cart.png" onclick="document.location='cart.jsp'" alt="** PLEASE DESCRIBE THIS IMAGE **"> 
<h2>The shopping cart</h2> 
<![CDATA[ 
    int i = 1; 
    java.util.Enumeration content = session.getAttributeNames(); 
    out.println("<form name=f1 action=bill.jsp>"); 
    out.println("<table>"); 
    while (content.hasMoreElements()) { 
     out.println("<tr>"); 
     out.println("<td>"); 
     out.println(i); 
     out.println(content.nextElement()); 
     out.println("</td>"); 
     out.println("<td> <input type=text name=i>"); 
     out.println("</td>"); 
     i++; 
    } 
    out.println("</table>"); 
]]> 
<a href="index.jsp"></a> 
<h3><a href="index.jsp"><strong>Continue Shopping</strong></a></h3> 
<a href="remove.jsp"><strong>Remove items From Cart</strong></a> 
<form><input type="submit" value="generate bill"></form>

bill.jsp

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%> 
<% 
String path = request.getContextPath(); 
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 
%> 
<!-- <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> --> 
<!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> 
<![CDATA[ 
    int i = 1; 
    java.util.Enumeration content = session.getAttributeNames(); 
    out.println("<form name=f2>"); 
    out.println("<table>"); 
    while (content.hasMoreElements()) { 
     out.println("<tr>"); 
     out.println("<td>"); 
     out.println(i); 
     out.println(content.nextElement()); 
     out.println("</td>"); 
     out.println("<td>"); 
     String a = request.getParameter("i"); 
     out.println(a); 
     out.println("</td>"); 
     i++; 
    } 
    out.println("</table>"); 
    out.println("</form>"); 
]]> 
<br> 
</body> 
</html>

来源

2013-09-29 Dilip Vijay

为前，如果我选择满足e三个元素，购物车将显示三个项目的三个文本字段中的任何一个。iam输入值4，，7,5但是在bill.jsp刚刚获得4,4,4 –

变化

String a = request.getParameter("i");

到

String[] a = request.getParameterValues("i");

来源

2013-09-29 23:57:34 Alex

使用JSP获取文本框的值

回答

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