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我有一項任務是使用JavaBeans創建一個在線銀行應用程序。我正在嘗試製作註冊表單，但我遇到了一些問題。表單提交時，我無法獲得值。JavaBeans問題表
的形式爲：
<jsp:include page="header.html"></jsp:include>
<h3>Create An Account</h3>
<form action="process_new_user_account.jsp" method="post" onsubmit="return validate_form(this)" >
<fieldset>
<legend>Personal Info</legend>
<table width="650px" border="0" align="center">
<tr>
<td width="25%"><div align="right">First Name: </div></td>
<td width="75%">
<input type="text" onblur="return validate_field(this)" onchange="return validate_field(this)" onfocus="return validate_field(this)" name="fname" tabindex="1" size="50"/>
</td>
</tr>
<tr>
<td><div align="right">Last Name: </div></td>
<td><input type="text" onblur="return validate_field(this)" onchange="return validate_field(this)" onfocus="return validate_field(this)" name="lname" tabindex="2" size="50"/></td>
</tr>
<tr>
<td><div align="right">Address:</div></td>
<td><input type="text" onblur="return validate_field(this)" onchange="return validate_field(this)" onfocus="return validate_field(this)" name="streetAddress" tabindex="3" size="50"/></td>
</tr>
<tr>
<td><div align="right">City:</div></td>
<td><input type="text" onblur="return validate_field(this)" onchange="return validate_field(this)" onfocus="return validate_field(this)" name="city" tabindex="4" size="50"/> </td>
</tr>
<td><div align="right">State:</div></td>
<td>
<select name="state" style="width: 300px;" tabindex="5" onblur="return validate_field(this)" onchange="return validate_field(this)" onfocus="return validate_field(this)">
<option value="">Select A State</option>
<option value="AL" >Alabama</option>
<option value="AK" >Alaska</option>
<option value="AZ" >Arizona</option>
<option value="AR" >Arkansas</option>
<option value="CA" >California</option>
<option value="CO" >Colorado</option>
<option value="CT" >Connecticut</option>
<option value="DE" >Delaware</option>
<option value="DC" >District of Columbia</option>
<option value="FL" >Florida</option>
<option value="GA" >Georgia</option>
<option value="HI" >Hawaii</option>
<option value="ID" >Idaho</option>
<option value="IL" >Illinois</option>
<option value="IN" >Indiana</option>
<option value="IA" >Iowa</option>
<option value="KS" >Kansas</option>
<option value="KY" >Kentucky</option>
<option value="LA" >Louisiana</option>
<option value="ME" >Maine</option>
<option value="MD" >Maryland</option>
<option value="MA" >Massachusetts</option>
<option value="MI" >Michigan</option>
<option value="MN" >Minnesota</option>
<option value="MS" >Mississippi</option>
<option value="MO" >Missouri</option>
<option value="MT" >Montana</option>
<option value="NE" >Nebraska</option>
<option value="NV" >Nevada</option>
<option value="NH" >New Hampshire</option>
<option value="NJ" >New Jersey</option>
<option value="NM" >New Mexico</option>
<option value="NY" >New York</option>
<option value="NC" >North Carolina</option>
<option value="ND" >North Dakota</option>
<option value="OH" >Ohio</option>
<option value="OK" >Oklahoma</option>
<option value="OR" >Oregon</option>
<option value="PA" >Pennsylvania</option>
<option value="RI" >Rhode Island</option>
<option value="SC" >South Carolina</option>
<option value="SD" >South Dakota</option>
<option value="TN" >Tennessee</option>
<option value="TX" >Texas</option>
<option value="UT" >Utah</option>
<option value="VT" >Vermont</option>
<option value="VI" >Virgin Islands</option>
<option value="VA" >Virginia</option>
<option value="WA" >Washington</option>
<option value="WV" >West Virginia</option>
<option value="WI" >Wisconsin</option>
<option value="WY" >Wyoming</option>
</select> </td>
</tr>
<tr>
<td><div align="right">Zip:</div></td>
<td><input name="zip" type="text" id="zip" tabindex="6" onblur="return validate_field(this)" onfocus="return validate_field(this)" onchange="return validate_field(this)" size="50"/></td>
</tr>
<tr>
<td><div align="right">Phone:</div></td>
<td> <input name="phone" type="text" id="phone" tabindex="7" onblur="return validate_field(this)" onfocus="return validate_field(this)" onchange="return validate_field(this)" size="50"/></td>
</tr>
<tr>
<td><div align="right">Email:</div></td>
<td><input name="email" type="text" id="email" tabindex="8" onblur="return validate_field(this)" onfocus="return validate_field(this)" onchange="return validate_field(this)" size="50"/></td>
</tr>
</table>
</fieldset>
<fieldset>
<legend>Login Info</legend>
<table width="650px" border="0" align="center">
<tr>
<td width="25%"><div align="right">Username:</div></td>
<td width="75%"><input name="username" type="text" id="username" tabindex="9" onblur="return validate_field(this)" onfocus="return validate_field(this)" onchange="return validate_field(this)" size="50"/></td>
</tr>
<tr>
<td><div align="right">Password:</div></td>
<td><input name="password" type="password" id="password" tabindex="10" onblur="return validate_field(this)" onfocus="return validate_field(this)" onchange="return validate_field(this)" size="50"/></td>
</tr>
<tr>
<td><div align="right">Reenter Password: </div></td>
<td><input name="passwordRE" type="password" id="passwordRE" tabindex="11" onblur="return validate_field(this)" onfocus="return validate_field(this)" onchange="return validate_field(this)" size="50"/></td>
</tr>
</table>
</fieldset>
<div align="center">
<input type="reset" name="Reset" value="Clear" />
<input type="submit" name="Submit" value="Create Account" tabindex="12" />
</div>
</form>
<br /><br />
<jsp:include page="footer.html"></jsp:include>
JSP頁面的對提交給（其短只是爲了測試，直到我得到它的工作）：
<%@page import="WebBank.Customer"%>
<jsp:useBean id="customer" scope="session" class="WebBank.Customer"/>
<jsp:setProperty name="customer" property="zip"/>
<jsp:include page="header.html"></jsp:include>
<h3>Welcome!</h3>
<p>Thank you for creating a new account with JAC Bank!</p>
<%
System.out.println("Testing.....");
System.out.println("Name: " + customer.getZip());
%>
<jsp:include page="footer.html"></jsp:include>
還有一類叫做具有默認構造函數和String getZip（）和void setZip（String zip）方法的客戶。
'我無法獲取值'意味着你得到一個異常，或者你得到null？ – Bozho 2009-12-06 18:23:11