How do I pre-fill text fields in a form with info from a database in a .jsp?
Question
I'm trying to create a form that updates an entry in a MySQL database. The table is a users table that contains various fields related to the user. I need this page to work as an update form that takes a username that is passed to it via the previous page and pre-fills the text fields with the existing data. It's a model one application that uses a presentation, transport, and data layer. The transport layer is User.java and the data layer (that interacts with the database) is UserDB.java.
Here's the code, everything is functional except the pre-filling.
UPDATE: I've edited to reflect the changes from the answers below, I also want to note that "UserDB.getUsers()" returns an ArrayList.
<%@ page language="java" contentType="text/html; charset=iso-8859-1"
pageEncoding="ISO-8859-1" import="java.util.ArrayList,beans.*,data.*"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%
//get parameters from the request
String userName = request.getParameter("userName");
ArrayList userList = UserDB.getUsers(userName);
User user = userList.get(0);
%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<link rel="stylesheet" href="styles/style.css" type="text/css" />
<title>User Admin</title>
</head>
<body>
<div id="main">
<h1>Update User</h1>
<h3>User Info</h3>
<hr>
<div id="content">
<form action="updateUser.jsp" method="get">
<p>User Name<br>
<input type="text" name="userName" size="20" value="<%=userName%>"/>
</p>
<p>Password<br>
<input type="text" name="password" size="20" value="<%=user.getPassword()%>"/>
</p>
<p>First Name<br>
<input type="text" name="firstName" size="20" value="<%=user.getFirstName()%>"/>
</p>
<p>Last Name<br>
<input type="text" name="lastName" size="20" value="<%=user.getLastName()%>"/>
</p>
<p>Email Address<br>
<input type="text" name="email" size="20" value="<%=user.getEmail()%>"/>
</p>
<p>
<input type="submit" value="Commit Update">
</p>
</form>
</div>
</div>
</body>
</html>
I know I'm doing something wrong with the "user" object, but I'm overlooking it.
2 answers
solution1
3 ACCPTED 2011-07-13 19:20:19
you are passing the username as a string
<%
//get parameters from the request
String userName = request.getParameter("userName");
user = UserDB.getUsers("userName");
//it should be (with out the quotes
user = UserDB.getUsers(userName);
%>
solution2
0 2011-07-13 19:25:08
The "username" should have the quotes removed. Also, where are you declaring user's type? ie.
User user =....getUser..
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.