Since
2008
Since
2008
Since
2008
getServletConfig().getServletContext().getRequestDispatcher(“jspfilepathtoforward”).forward(request, response);
The above line is essence of the answer for “How does a servlet communicate with a JSP page?”
When a servlet jsp communication is happening, it is not just about forwarding the request to a JSP from a servlet. There might be a need to transfer a string value or on object itself.
Following is a servlet and JSP source code example to perform Servlet JSP communication. Wherein an object will be communicated to a JSP from a Servlet.
1. Servlet instantiates a bean and initializes it.
2. The bean is then placed into the request
3. The call is then forwarded to the JSP page, using request dispatcher.
Example Servlet Source Code: (ServletToJSP.java)
public class ServletToJSP extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//communicating a simple String message.
String message = "Example source code of Servlet to JSP communication.";
request.setAttribute("message", message);
//communicating a Vector object
Vector vecObj = new Vector();
vecObj.add("Servlet to JSP communicating an object");
request.setAttribute("vecBean",vecObj);
//Servlet JSP communication
RequestDispatcher reqDispatcher = getServletConfig().getServletContext().getRequestDispatcher("/jsp/javaPapers.jsp");
reqDispatcher.forward(request,response);
}
}
Example JSP Source Code: (javaPapers.jsp)
<html>
<body>
<%
String message = (String) request.getAttribute("message");
out.println("Servlet communicated message to JSP: "+ message);
Vector vecObj = (Vector) request.getAttribute("vecBean");
out.println("Servlet to JSP communication of an object: "+vecObj.get(0));
%>
</body>
</html>
Comments are closed for "Servlet JSP Communication".
I love this article a lot. JSP Servlet communication nicely explained.
Really useful article on Servlet JSP Communication
This is really very handy article.
Vector and String example really helped me a lot.
Thanks
-Shailesh
we can write like request.getRequestDispatcher() then you have written like this? any special use?
Nice One on Servelt JSP communication…
really nice…very easy to understand for beginners
I dint understand it.. I got error when i executed it.. so pls can u explain the code in a simpler way.?
great article!!!
it is very useful……easy to understand
thank u…………
good article , very easily explained, keep up the great job site owners, more questions on servlets would have helped more.
Nice website……….
easy to learn jsp servlet communication……..
Ami Tiwari
Awesome explanation
Thanks lot…
Good explanation, thanks
Very nice……
I love this
Really helpful…
thanks leave by a chinese java beginer .
good explanation …..its very useful for beginners
plz tell me the difference between doGet and doPost
nice web design
good one
good Example
*Nice and useful one…………
Hi,
This is kalyan i am new for java.I am learning java just from last month, i have good knowledge in Flash Action Script so that the reason i learn java. But i am getting some problems in SERVOLETS and JSP
plz help me how to connect between servolets and jsp.
Thanks & Regards
Kalyan Kumar.
Hyderabad.
good example
this website is really great. i knew about getting datas from servlet to jsp through this site only. i can,t get it from any other sites. great job joe… thanks
This website is very nice to read. there is no distrub and interub by displaying adds. so it is usefull to learners
Very well explained code example. Simple yet sophisticated!
It’s Very Useful for me ……….
Thank You so much..
Nice example..for Servlet and Jsp understanding…
Excellent Superb awesome
hi am creting a dashboard using servlts and jsp..i am new to java..
i need to get values from database and then depending upon the values i have to show on screen the colour changes…example if some value is 7:00am a file came , so if it is late a circle should be shown with colur Red.
i have creted a sample program to get the values from database but i dont know how to compare the values coming from database and to show on screen.
can u guide me….
elp….
what is Inter-servlet communication.?
nice example easy to understood.
sir i want software requirement specifications for java 6.0 software
will u post me answer sir??
thanku
very nice
waste waste waste
i like java and JSP .too.
Very nice……….
Connection myConn=null;
Statement myStmt=null;
ResultSet myRs=null;
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType(“text/html;charset=UTF-8”);
PrintWriter out = response.getWriter();
try {
/*
* TODO output your page here. You may use following sample code.
*/
/*out.println(“”);
out.println(“”);
out.println(“Servlet userDetail”);
out.println(“”);
out.println(“”);
out.println(“Servlet userDetail at ” + request.getContextPath() + “”);
out.println(“”);
out.println(“”);*/
Class.forName(“com.mysql,jdbc.Driver”);
myConn=DriverManager.getConnection(“jdbc.mysql://localhost:3306/wp2″,”root”,””);
myStmt=myConn.createStatement();
String query=”select * from userdetails”;
myRs=myStmt.executeQuery(query);
while(myRs.next());
{
out.println(“Username”+myRs.getString(“uname”));
out.println(“Password”+myRs.getString(“upass”));
out.println(“”);
}
}
catch(Exception e)
{
System.out.println(“Exception”+e);
}
finally {
try
{
myConn.close();
myStmt.close();
myRs.close();
}
catch(Exception e)
{
System.out.println(“Exception from finally”+e);
}
what’s wrong with this program.. Why I can’t connect to server?? I using localhost myself and use wamp server. Thx
lol
nice one..
nice one easily understood RequestDispatcher usage from this tutorial
Sir, can u plz explain me what is ServletContext Listener with use and example also
Thanks
ja re diwane
joe u r handsome
u r way better than ranga
joe i want know that what is the relation between finalize method and garbage collector.
add ur DB password to getConnection
I configured similar but i am unable to retrieve string on jsp can please help me.
FYI: I do following
request.setAttribute(“QueryURL”, finalquery);
//getServletContext().getRequestDispatcher(“/NoLimitSearch.jsp”).forward(request, response);
RequestDispatcher reqDispatcher = getServletConfig().getServletContext().getRequestDispatcher(“/NoLimitSearch.jsp”);
reqDispatcher.forward(request,response);
and on NoLimitSearch.jsp:
finalquery = (String) request.getParameter(“QueryURL”);
System.out.println(“QUERY: “+ finalquery);
Result:
QUERY: null
why???
easy understanding u r answers sir…,
sorry ,we want to get more clarity on the disscuss of the topic
HI JOE,
I HAVE DECIDED TO BUILD AN APPLICATION USING
SWINGS + SERVLETS + HIBERNATE.
I HAVE KNOWLEDGE OF CREATION USING THE FOLLOWING
JSP + SERVLETS + HIBERNATE.
BUT I DONT KNOW HOW TO CALL SERVLET FROM A SWING.
IF YOU HAVE A CRUD EXAMPLE PLS SHARE
check Your library folder. A jar file required for the mysql database..
nice topic!! Thank you!
Very nice example
really helpful
sir , thanks for your service. can u send me servlet projects if available.
Very nice explanation…. really usefull.. Thank you..
Very useful article, but when I try to run it I get the following exception: “java.lang.IllegalStateException: Cannot forward after response has been committed”. Any idea what’s going on? Thanks in advance
Thank you for nice article. It’s very useful for beginners.
Best Article about servlet JSP! Thanks