Displaying Java Property in JSP
I have a class with a property called title and I have a getter/setter that gets and sets the property. If the property is P I need to print the word "Peer" on the page, and if it's T I need to print "Team" on the page. Can I do this in a JSP without using a scriplets? I tried using
<jsp:getProperty name="value" class"classname" />
but from there I have no idea how to use a开发者_如何学运维 conditional in a JSP. Please help.
Use JSTL, as @CoolBeans says. It would look something like this:
In the servlet,
// where myBean is an instance of the class with [get|set]Title
request.setAttribute("myFoo", myBean);
Then, in the JSP,
<c:choose>
<c:when test="${myBean.title eq 'P'}">Peer</c:when>
<c:when test="${myBean.title eq 'T'}">Team</c:when>
</c:choose>
If you're not familiar with JSTL, I'd recommend reading through the JSP section of the Java EE 5 Tutorial, or picking up a copy of Head First Servlets and JSP (it's quite good).
You should use JSTL. Here is an example:
<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %>
<c:if test="${yourClass.p eq 'P'}">PEER</c:if>
I used properties to set and get data from the user, by creating a java class handler and use a "useBean"... Here is some code I generated to fix my problem... hope it helps..
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" type="text/css" href="style.css">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Login and Do Action</title>
</head>
<% // java code
%>
<body>
<jsp:useBean id="myBean" scope="session" class="org.mypackage.IFPWAFCAD.NameHandler" />
<jsp:setProperty name="myBean" property="name"/>
<jsp:setProperty name="myBean" property="screenName"/>
<jsp:setProperty name="myBean" property="username"/>
<jsp:setProperty name="myBean" property="password" />
<h1>Hello <jsp:getProperty name="myBean" property="screenName" />! Ready to Login and perform Action</h1>
<form method="post" action="DBConnection">
<table border="0">
<thead>
<tr>
<th>
</th>
<th>
</th>
</tr>
</thead>
<tbody>
<tr>
<td>Table:</td>
<td><input type="radio" name="tableName" value="product"/>Produce
<<input type="radio" name="tableName" value="customer" />Customer
<input type="radio" name="tableName" value="actor" checked="checked" />Actor</td>
</tr>
<tr>
<td>Action:</td>
<td>
<select name="action" value="0">
<option value="0">Choose a Action...</option>
<option value="create">Create</option>
<option value="read">Read</option>
<option value="update">Update</option>
<option value="delete">Delete</option>
<option value="fancy">Fancy Display</option>
<option value="pass">Pass to JSP File</option>
</select>
</td>
</tr>
<tr>
<td>Record ID:</td>
<td><input type="text" name="tid" size="3"/></td>
</tr>
<tr>
<td>
First Name:
</td>
<td>
<input type="text" name="firstname" size="30"/>
</td>
</tr>
<tr>
<td>
Last Name:
</td>
<td>
<input type="text" name="lastname" size="30"/>
</td>
</tr>
<tr>
<td>
</td>
<td>
<input type="hidden" name="name" value="<jsp:getProperty name="myBean" property="name" />" />
<input type="hidden" name="username" value="<jsp:getProperty name="myBean" property="username" />" />
<input type="hidden" name="screenName" value="<jsp:getProperty name="myBean" property="screenName" />" />
<input type="hidden" name="password" value="<jsp:getProperty name="myBean" property="password" />" />
</td>
</tr>
</tbody>
</table>
<input type="submit" value="Login" />
<input type="reset" name="clear" value="Clear" />
</form>
</body>
加载中,请稍侯......
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