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.