Returning multiple parameters as response from a servlet
Hii Javaites
I want a servlet to return multiple parameters as response.
In my functionality , i am callling the servlet from a swing client .
I need to get two xml strings as response from the servlet.
Right now i am using
PrintWriter pw=response.getWriter();
pw.write(xmlString);
for writing xml string . but wht if i want to send another String (xmlString2) as resposne from the servlet to the swing application ?
You have several possibilities. If you control the XML formats you could unify the data into one XML message. You could modify your Swing app to make two requests. If it needs two separate pieces of info it is more logical to do it as two separate requests. If you really must do it this way, you could use the Zip classes (built in to Java) to put the two XML files together into a Zip file and then send that.
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I want to send a response from the servlet and then call another servlet.
Hi,
I want to send a response from the servlet and then call another servlet. can this happen. Here is my scenario.
1. Capture all the information from a form including an Email address and submit it to a servlet.
2. Now send a message to the browser that the request will be processed and mailed.
3. Now execute the request and give a mail to the mentioned Email.
Can this be done in any way even by calling another servlet from within a servlet or any other way.
Can any one Please help me out.
Thanks,
RameshMaybe that will help you (This is registration sample):
1.You have Registration.html;
2.You have Registration servlet;
3.You have CheckUser servlet;
4.And last you have Dispatcher between all.
See the code:
Registration.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<HTML>
<HEAD>
<TITLE>Hello registration</TITLE>
</HEAD>
<BODY>
<H1>Entry</H1>
<FORM ACTION="helloservlet" METHOD="POST">
<LEFT>
User: <INPUT TYPE="TEXT" NAME="login" SIZE=10><BR>
Password: <INPUT TYPE="PASSWORD" NAME="password" SIZE=10><BR>
<P>
<TABLE CELLSPACING=1>
<TR>
<TH><SMALL>
<INPUT TYPE="SUBMIT" NAME="logon" VALUE="Entry">
</SMALL>
<TH><SMALL>
<INPUT TYPE="SUBMIT" NAME="registration" VALUE="Registration">
</SMALL>
</TABLE>
</LEFT>
</FORM>
<BR>
</BODY>
</HTML>
Dispatcher.java
package mybeans;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.ServletException;
import java.io.IOException;
import javax.servlet.RequestDispatcher;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class Dispatcher extends HttpServlet {
protected void forward(String address, HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
RequestDispatcher dispatcher = getServletContext().
getRequestDispatcher(address);
dispatcher.forward(request, response);
Registration.java
package mybeans;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class Registration extends Dispatcher {
public String getServletInfo() {
return "Registration servlet";
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
ServletContext ctx = getServletContext();
if(request.getParameter("logon") != null) {
this.forward("/CheckUser", request, response);
else if (request.getParameter("registration") != null) {
this.forward("/registration.html", request, response);
CheckUser.java
package mybeans;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;
public class CheckUser extends Dispatcher {
Connection conn;
Statement stat;
ResultSet rs;
String cur_UserName;
public static String cur_UserSurname;;
String cur_UserOtchestvo;
public String getServletInfo() {
return "Registration servlet";
public void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try{
ServletContext ctx = getServletContext();
Class.forName("oracle.jdbc.driver.OracleDriver");
conn = DriverManager.getConnection("jdbc:oracle:oci:@eugenz","SYSTEM", "manager");
stat = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
String queryDB = "SELECT ID, Login, Password FROM TLogon WHERE Login = ? AND Password = ?";
PreparedStatement ps = conn.prepareStatement(queryDB);
User user = new User();
user.setLogin(request.getParameter("login"));
String cur_Login = user.getLogin();
ps.setString(1, cur_Login);
user.setPassword(request.getParameter("password"));
String cur_Password = user.getPassword();
ps.setString(2, cur_Password);
Password = admin");
rs = ps.executeQuery();
String sn = "Zatoka";
String n = "Eugen";
String queryPeople = "SELECT ID, Surname FROM People WHERE ID = ?";
PreparedStatement psPeople = conn.prepareStatement(queryPeople);
if(rs.next()) {
int logonID = rs.getInt("ID");
psPeople.setInt(1, logonID);
rs = psPeople.executeQuery();
rs.next();
user.setSurname(rs.getString("Surname"));
FROM TLogon, People WHERE TLogon.ID = People.ID";
ctx.setAttribute("user", user);
this.forward("/successLogin.jsp", request, response);
this.forward("/registration.html", request, response);
catch(Exception exception) {
}CheckUser.java maybe incorrect, but it's not serious, because see the principe (conception).
Main is Dispatcher.java. This class is dispatcher between all servlets. -
How to send response from a servlet to a page in CQ??
hi.. i have this servlet from where i need to send a string array or list array to the CQ webpage?? and this need's to be populated into a dropdown list on that page??..
Hi,
Unless if there is a specific need to use a servlet, you can implement the same logic(to generate dropdown list) inside a java bean. Use a getter that returns dropdown list and use the bean inside jsp and call the getter to populate dropdown list. In case, if you have to use servlet, you can use HttpClient inside bean getter to obtain response from the servlet and return the list or array.
Regards,
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Returning multiple values at once from listOfValues region
Friends,
I've created a region (listOfValues) which has 4 fields/columns
ResponsibilityName, ResponsibilityId, ApplicationName, ApplicationId
I assigned ResponsibilityName of the listOfValues to a field Responsibility in a page.
It works fine when I select a value from this LOV. It returns a value to 'Responsibility' field of the page.
Is it possible to return other 3 fields as well while selecting ResponsibilityName from LOV. for example while selecting a value for field 'Responsibility' , can the LOV return ResponsibilityId from LOV to field 'ResponsibilityId' in the page, at the same time?
Can 1 selection returns more than 1 values to fields?Nadir,
I would suggest you have a look of the chapter on LOVs in the dev guide. Just to give you an idea, you map an item in the LOV table to an item on the base page. If you select one value from the LOV table, corresponding values are redirected to the accordingly mapped items on the base page. -
Help: No Parameters, HTML Output from Java Servlet
I have a Java Servlet that reads parameters passed from an HTML form and displays them to another HTML page. I know the servlet is being invoked; however, I am not seeing any HTML output. Sending the output to a file reveals the parameters are coming in as NULL as well.
I attempted a simple sample app with the same results. Here is what I am running:
The HTML Form:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE>Collecting Three Parameters</TITLE>
</HEAD>
<BODY BGCOLOR="#FDF5E6">
<H1 ALIGN="CENTER">Collecting Three Parameters</H1>
<FORM ACTION="ThreeParams">
First Parameter: <INPUT TYPE="TEXT" NAME="param1"><BR>
Second Parameter: <INPUT TYPE="TEXT" NAME="param2"><BR>
Third Parameter: <INPUT TYPE="TEXT" NAME="param3"><BR>
<CENTER><INPUT TYPE="SUBMIT"></CENTER>
</FORM>
</BODY>
</HTML>
The Java Code:
public class ThreeParams extends HttpServlet {
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String title = "Reading Three Request Parameters";
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 " +
"Transitional//EN\">\n" +
"<BODY BGCOLOR=\"#FDF5E6\">\n" +
"<H1 ALIGN=\"CENTER\">" + title + "</H1>\n" +
"<UL>\n" +
" <LI><B>param1</B>: "
+ request.getParameter("param1") + "\n" +
" <LI><B>param2</B>: "
+ request.getParameter("param2") + "\n" +
" <LI><B>param3</B>: "
+ request.getParameter("param3") + "\n" +
"</UL>\n" +
"</BODY></HTML>");
What happens when I "submit" from the form is the same form reloads with the query string in the URL: "http://localhost:8080/ThreeParams/?param1=1¶m2=2¶m3=3"
Any assistance with either (or both) would be thoroughly appreciated:
a) why the parameters are not being passed correctly to the servlet
b) why the HTML output page is not displayed
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guys,
i have a servlet which behaves differently based on the presence of a cookie or not. If cookie A is present in the machine it shows the the home page and if not it shows the login page.
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Your help would be much appreciated !
Thanks & Regards,
Sherin Jose PHi,
Please find the below UDF that i used when i got the same requirement.
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MT_Source
SSN
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ZIdoc
Empame
indClientSite
doj....etc
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ssn---->findEmpInfo->findEmpName----EmpName
findClientSite---->clientsite
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String targetValue = "";
AbstractTrace trace = container.getTrace();
RfcAccessor rAcc = null;
ByteArrayOutputStream out = null;
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rAcc = LookupService.getRfcAccessor(ch); //Get RfcAccessor
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byte[] bArray = new byte[512];
out = new ByteArrayOutputStream(512);
for(int i=in.read(bArray);i>0;i = in.read(bArray)){ out.write(bArray,0,i);
targetValue = out.toString();
catch(LookupException ex){
trace.addDebugMessage("LookupException"+ex.getMessage());
catch(IOException ex){
trace.addDebugMessage("IOException"+ex.getMessage());
finally{
if(out !=null){
try{
out.close();
catch(IOException ex){
trace.addDebugMessage("ErrorDuring Closing buffer"+ex.getMessage());
if(rAcc !=null){
try{ rAcc.close();
catch(LookupException ex){
trace.addDebugMessage("Error while closing RFCAccessor"+ex.getMessage());
GlobalContainer gContainer = container.getGlobalContainer();
gContainer.setParameter("RFCResponse",targetValue);
return targetValue;
public String findEmpName(String str, Container container) throws StreamTransformationException{
GlobalContainer gContainer = container.getGlobalContainer();
Object obj = gContainer.getParameter("RFCResponse");
String str ="";
str = obj.toString();
String st = "\"";
str = str.replaceAll("<", "<");
str = str.replaceAll(""", st);
str = str.replaceAll(">", ">");
String clntSite = "";
AbstractTrace trace = container.getTrace();
ByteArrayInputStream in;
in = new ByteArrayInputStream(str.getBytes());
try{
DocumentBuilderFactory dbFact = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuild = dbFact.newDocumentBuilder();
Document doc = dBuild.parse(in);
NodeList nList1 = doc.getElementsByTagName("CLNTSITE");
for(int i=0;i<nList1.getLength();i++){
Node nFname = nList1.item(0);
clntSite = nFname.getChildNodes().item(0).getNodeValue();
trace.addWarning("Client Site : "+nFname.getChildNodes().item(0).getNodeValue());
catch(Exception ex){
trace.addWarning("Exception Occurred :"+ex);
return clntSite;
Hop this will help you......
Thanks&Regards
Priyanka -
Xhtml call to servlet not returning response, not calling servlet
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xhtml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:c="http://java.sun.com/jsp/jstl/core"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:ejstreegrid="https://unfccc.int/nais/ejstreegrid"
xmlns:grid="http://java.sun.com/jsf/composite/gridcomp"
xmlns:nais="http://java.sun.com/jsf/composite/naiscomp">
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import java.io.IOException;
import java.util.Enumeration;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
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private static final long serialVersionUID = 1L;
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super();
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
processRequest(request, response);
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HttpServletResponse response) throws ServletException, IOException {
processRequest(request, response);
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HttpServletResponse response) throws IOException {
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response.getWriter().write("some response");
} catch (Exception e) {
logger.error(e.getMessage());
e.printStackTrace();
response.getWriter().println("Error: " + e.getMessage());
I also have a menu.xhtml that is calling the xhtml file:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:c="http://java.sun.com/jsp/jstl/core"
xmlns:ui="http://java.sun.com/jsf/facelets">
<body>
<script type="text/javascript">
$(document).ready(function() {
$("#btn").click(function() {
$("#upload").click();
return false;
</script>
<ui:composition>
<div id="navigation_bar">
<ul id="topbarleft">
<c:choose>
<c:when test="${currentPage=='somepage.xhtml'}">
<li><b>Some Page display</b></li>
</c:when>
<c:otherwise>
<li><h:outputLink value="somepage.jsf">
<h:outputText value="some page" />
</h:outputLink></li>
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</html>Is there some special format for submitting a form to a servlet from xhtml? Any ideas what could be wrong?
Edited by: Atlas77 on Apr 16, 2012 6:53 AM
Edited by: Atlas77 on Apr 16, 2012 6:54 AM
Edited by: Atlas77 on Apr 16, 2012 6:56 AM
Edited by: Atlas77 on Apr 16, 2012 7:27 AMYou have a template. That template doesn't have for example a h:form of its own in which the body content is placed right? Nested forms don't work.
Also for the next time, use \ tags to post code; that makes it actually readable. As you can see, the forum is now trying to interpret some special characters for formatting. -
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Hello J2EE gurus,
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assuming CallableStatement, Connection have been
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[email protected] -
Hi all,
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The light of target destination is green.
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Trying to publish asset types during inicialization it returns this error:
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sites.log in delivery environment says as follows
[2014-01-24 12:13:52,496 CET] [ERROR] [.kernel.Default (self-tuning)'] [fatwire.logging.cs.db] SQLException loading table definition for SiteCatalog with state HY000: [FMWGEN][SQLServer JDBC Driver]Object has been closed.
java.sql.SQLException: [FMWGEN][SQLServer JDBC Driver]Object has been closed.
[2014-01-24 12:13:52,527 CET] [ERROR] [.kernel.Default (self-tuning)'] [com.fatwire.logging.cs] ContentServer exception running CS recursively
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[2014-01-24 12:13:52,543 CET] [ERROR] [.kernel.Default (self-tuning)'] [logging.cs.satellite.request] Error accessing the external page with pmd: page: ?Browser=Unknown Browser&SystemAssetsRoot=/dlv/futuretense_cs/&errdetail=0&errno=0&null= &pagename=fatwire/wem/sso/casInfo
[2014-01-24 12:13:52,543 CET] [ERROR] [.kernel.Default (self-tuning)'] [fatwire.logging.cs.request] COM.FutureTense.Common.ContentServerException: ContentServerException: (Reading page page: ?Browser=Unknown Browser&SystemAssetsRoot=/dlv/futuretense_cs/&errdetail=0&errno=0&null= &pagename=fatwire/wem/sso/casInfo from co-resident Content Server failed (errno=0).) Error code:GENERIC SERVER ERROR
[2014-01-24 12:14:06,021 CET] [ERROR] [.kernel.Default (self-tuning)'] [fatwire.logging.cs.db] SQLException loading table definition for SystemInfo with state HY000: [FMWGEN][SQLServer JDBC Driver]Object has been closed.
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Thank you very much.
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