getAttribute() Method Of The Request Object
This is the page for the illustration of the getAttribute()
method of the request object in JSP. This method retrieves the values
corresponding to the given attribute name that is set through the setAttribute()
method of the request object. The getAttribute() method of the
object takes a string argument which is the attribute name which values is to be
retrieved.
In this section, you will learn about how to set the
attribute with it's value by using the setAttribute() method of the
object in JSP and this value is retrieved by mentioning the attribute name in
the method getAttribute() method of the object in JSP. Here, you will see
that how both methods have been used for setting attributes with values and
getting value of the attribute.
This section provide three file in which two are the
JSP file and one is the html file for constructing a form with user name and
password field. These are as follows:
- GetAttributeMethod.html
- GetAttributeMethod.jsp
- GetAttributeMethod1.jsp
When you submit the html form
GetAttributeMethod.jsp file is caller which set the attribute name and create a
RequestDispatcher for dispatching the request and response object
with all properties and states of that. This created dispatcher redirects the
control to the GetAttributeMethod1.jsp file directly after setting all the
functionalities existed in the GetAttributeMethod.jsp page.
Here is the code of the HTML file:
<html>
<body>
<form action="GetAttributeMethod.jsp" method="post">
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td>User Name: </td>
<td><input type="text" size="20" name="txtUserName" />
</tr>
<tr>
<td>Password: </td>
<td><input type="password" size="20" name="txtUserName" />
</tr>
<tr>
<td> </td>
<td><input type="submit" value="Submit" name="B1" /></td>
</tr>
</table>
</form>
</body>
</html>
|
Output for the HTML file:
Here is the JSP code of GetAttributeMethod.jsp file:
<%@page import="java.util.*" %>
<%
String username, password;
if(request.getParameter("txtUserName") == null)
username = "";
else
username = request.getParameter("txtUserName");
if(request.getParameter("txtPassword") == null)
password = "";
else
password = request.getParameter("txtPassword");
request.setAttribute("UName", username);
%>
<%
String strViewPage="GetAttributeMethod1.jsp";
RequestDispatcher dispatcher = request.getRequestDispatcher(strViewPage);
if (dispatcher != null){
dispatcher.forward(request, response);
}
%>
|
Here is the JSP code of the GetAttributeMethod1.jsp
file:
<%
out.println("<b>Welcome " + request.getAttribute("UName") + "!</b>");
%>
|
Output for the GetAttributeMethod1.jsp file:
Download the
GetAttributeMethod.html file.
Download the
GetAttributeMethod.jsp file.
Download the
GetAttributeMethod1.jsp file.
|
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