验证jsp页面文本框 [英] Validate jsp page textboxes
本文介绍了验证jsp页面文本框的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我创建了一个需要帮助验证的jsp页面。页面上有5个文本框。 2是文本（longDetails，shortDetails），3是整数（UPC，Price，Quantity）。他们都需要进行验证，以确保表单未提交无效数据。
我的页面代码和我的脚本请告诉我我做错了什么。
<％@ page import = java.util.List ％>
<％@ page import = jonej102.Product ％>
< ;％@ page contentType = text / html pageEncoding = UTF-8 ％>
<％@ taglib prefix = c uri = http：// java.sun.com/jsp/jstl/core\" ％>
< ！DOCTYPE html >
< html >
< head >
< meta http-equiv = 内容类型 content = text / html; charset = UTF-8 >
< title > 广告资源< / title >
< / head >
< / script >
< body >
< span class =code-keyword>< h1 > 查看广告资源< / h1 >
< jsp：usebean id = inventoryBean class = jonej102.InventoryManager xmlns：jsp = ＃unknown > < / jsp：usebean >
< table < span class =code-attribute> border = 1 cellspacing = 10 >
< th > UPC < / th >
< th > 详细信息< / th >
< th > 简短详情< / th >
< th > 价格（$）< / th >
< th > 数量< / th >
< th > < / th >
< th > < / th >
< c：foreach var = product items = $ {inventoryBean.getProductList（）} xmlns：c = ＃unknown >
< 表单 action = < span class =code-keyword> inventory 方法 = POST >
< tr >
< td > < input type = text name = upc value = $ {product.getUpc（）} size = 10 / > < span class =code-keyword>< / td >
< td > < input 类型 = text 名称 = longDetails value = $ {product.getLongDetails（）} 大小 = 50 / > < / td >
< ; td > < 输入 type = text 名称 = shortDetails value = $ {product.getShortDetails（）} size = 20 / > < / td >
< td > < input type = text name = price value = $ {product.getPrice（）} / > < / td >
< span class =code-keyword>< td > < 输入 type = text name = sto ck value = $ {product.getStock（）} size = 4 < span class =code-keyword> / > < / td >
< td > < input type = 提交 名称 = 按钮 value = 更新 / > < / td >
< td > < input 类型 = 提交 名称 = bu tton value = 删除 / > < / td >
< / tr >
< / form >
< / c：foreach >
< / table >
< br / >
< h1 > 管理广告资源< / h1 >
< form 方法 = POST action = 库存 >
UPC：< 输入 类型 = text name = upc size = 10 / >
< br / > < br / >
详细信息：< input type = text < span class =code-attribute> name = longDetails size = 50 / >
< br / > < br / >
简短详情：< input type = text name = shortDetails size = 20 < span class =code-keyword> / >
< br / > < br / >
价格：$ < 输入 < span class =code-attribute> type = text 名称 = 价格 / >
< br / > < br / < span class =code-keyword>>
库存：< 输入 type = text name = stock size = 4 < span class =code-keyword> / >
< br / > < br / > < br / >
< 输入 类型 = 提交 名称 = 按钮 值 = 创建 / >
< / form >
< / body >
< span class =code-keyword>< / html >
函数validateMyForm（）
{
var valid = true;
var validationMessage ='请更正以下错误：\\\\ n';
if（document.getElementById（'upc'）。value.length == 0）
{
validationMessage = validationMessage +' - UPC缺失\\\\ n';
有效= false;
}
if（document.getElementById（'longDetails'）。value.length == 0）
{
validationMessage = validationMessage +' - Long Details is missing\r \\ \
';
有效= false;
}
if（document.getElementById（'shortDetails'）。value.length！= 10）
{
validationMessage = validationMessage +' - 缺少详细信息。\ r \\\
';
有效= false;
}
if（document.getElementById（'price'）。value.length == 0）
{
validationMessage = validationMessage +' - 价格缺失\\\ N';
有效= false;
}
if（document.getElementById（'stock'）。value.length == 0）
{
validationMessage = validationMessage +' - 库存缺失\\\ N';
有效= false;
}
if（valid == false）
{
alert（validationMessage）;
}
返回有效;
}
< / 脚本 >
[edit]已添加代码块 - OriginalGriff [/ edit]
我的尝试：
OP留空 - 这个添加让它发布... [/ edit]
解决方案
）< ; / th >
< th > 数量< ; / th >
< th > < / th >
< th > < / th >
< < span class =code-leadattribute> c：foreach var = product items =
{inventoryBean.getProductList（）} xmlns：c = ＃unknown >
< 表格 操作 = 库存 方法 = POST >
< tr >
< td > < input type = text name = upc < span class =code-attribute> value =
{product.getUpc（）} size = 10 / > < < span class =code-leadattribute> / td >
< td > < input type < span class =code-keyword> = text name = longDetails value =
I have created a jsp page that I need help validating. There are 5 textboxes on the page. 2 are text(longDetails, shortDetails) and 3 are integers(UPC,Price,Quantity). They all need to be validated to make sure the form isn't submitted with invalid data.
I have the page code here along with my script please let me know what I'm doing wrong.
<%@page import="java.util.List"%>
<%@page import="jonej102.Product"%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Inventory</title>
</head>
</script>
<body>
<h1>View Inventory</h1>
<jsp:usebean id="inventoryBean" class="jonej102.InventoryManager" xmlns:jsp="#unknown"></jsp:usebean>
<table border="1" cellspacing="10">
<th>UPC</th>
<th>Long Details</th>
<th>Short Details</th>
<th>Price ($)</th>
<th>Quantity</th>
<th></th>
<th></th>
<c:foreach var="product" items="${inventoryBean.getProductList()}" xmlns:c="#unknown">
<form action="inventory" method="POST">
<tr>
<td><input type="text" name="upc" value="${product.getUpc()}" size="10" /></td>
<td><input type="text" name="longDetails" value="${product.getLongDetails()}" size="50" /></td>
<td><input type="text" name="shortDetails" value="${product.getShortDetails()}" size="20" /></td>
<td><input type="text" name="price" value="${product.getPrice()}" /></td>
<td><input type="text" name="stock" value="${product.getStock()}" size="4" /></td>
<td><input type="submit" name="button" value="Update" /></td>
<td><input type="submit" name="button" value="Delete" /></td>
</tr>
</form>
</c:foreach>
</table>
<br />
<h1>Manage Inventory</h1>
<form method="POST" action="inventory">
UPC: <input type="text" name="upc" size="10" />
<br /><br />
Long Details: <input type="text" name="longDetails" size="50" />
<br /><br />
Short Details: <input type="text" name="shortDetails" size="20" />
<br /><br />
Price: $<input type="text" name="price" />
<br /><br />
Stock: <input type="text" name="stock" size="4" />
<br /><br /><br />
<input type="submit" name="button" value="Create" />
</form>
</body>
</html>
function validateMyForm()
{
var valid = true;
var validationMessage = 'Please correct the following errors:\r\n';
if (document.getElementById('upc').value.length == 0)
{
validationMessage = validationMessage + ' - UPC is missing\r\n';
valid = false;
}
if (document.getElementById('longDetails').value.length == 0)
{
validationMessage = validationMessage + ' - Long Details are missing\r\n';
valid = false;
}
if (document.getElementById('shortDetails').value.length != 10)
{
validationMessage = validationMessage + ' - Short Details are missing.\r\n';
valid = false;
}
if (document.getElementById('price').value.length == 0)
{
validationMessage = validationMessage + ' - Price is missing\r\n';
valid = false;
}
if (document.getElementById('stock').value.length == 0)
{
validationMessage = validationMessage + ' - Stock is missing\r\n';
valid = false;
}
if (valid == false)
{
alert(validationMessage);
}
return valid;
}
</script>
[edit]Code block added - OriginalGriff[/edit]
What I have tried:
[edit]Left blank by OP - This added to let it post...[/edit]
解决方案
)</th> <th>Quantity</th> <th></th> <th></th> <c:foreach var="product" items="
{inventoryBean.getProductList()}" xmlns:c="#unknown"> <form action="inventory" method="POST"> <tr> <td><input type="text" name="upc" value="
{product.getUpc()}" size="10" /></td> <td><input type="text" name="longDetails" value="
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