Posted on: October 8, 2012 at 12:00 AM
Java Servlet : Setting Attribute
In this tutorial, we will discuss how setAttribute() method works.
setAttribute(String name,Object obj) :
If we want to limit the scope of an attribute to the request then we will set attribute on a request object. request.setAttribute(String name,Object obj) method stores an attribute in the request.
Parameters:
name - it is of String type and specify the name of the attribute
obj - Object to be stored
Example : In this example we are setting attribute whose scope is to the request.
SetAttributeExample.java - This is servlet in which we are setting attribute name and forward to the jsp page.
package net.roseindia;
import java.io.IOException;
import javax.servlet.*;
import javax.servlet.http.*;
public class SetAttributeExample extends HttpServlet {
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
String name = "Roseindia";
request.setAttribute("Name", name);
ServletContext context = getServletContext();
RequestDispatcher rd = context
.getRequestDispatcher("/setAttributeExample.jsp");
rd.forward(request, response);
}
}
setAttributeExample.jsp - In this jsp page we are displaying value which we set on the servlet.
<html>
<body>
<center>
<b>
Value which we set on servlet using request.setAttribute() method:
<font color="blue">
<%=request.getAttribute("Name") %>
</font>
</b>
</center>
</body>
</html>
web.xml -
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"> <display-name>SetAttributeExample</display-name> <servlet-name>SetAttributeExample</servlet-name> <servlet-class>net.roseindia.SetAttributeExample</servlet-class> </servlet> <servlet-mapping> <servlet-name>SetAttributeExample</servlet-name> <url-pattern>/SetAttributeExample</url-pattern> </servlet-mapping> </web-app>
Output :
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