how to request to servlet from Ajax

[santhoskumara]

How to request to servlet from Ajax and also I got the DOM object in the servlet through Business Logic. Now how will i pass the DOM object from serlvet to Clientside. Where in the client Side i am using Ajax.


kindly advice me.

[ak1dnar]

Its Better to ask this question with the Coding that you made so far.
Because the coding might explain the situation rather than 1000 words that you've posted with your question. Thanks!

[santhoskumara]

Post: how to request to servlet from Ajax
--------------------------------------------------------------------------------

How to request to servlet from Ajax and also I got the DOM object in the servlet through Business Logic. Now how will i pass the DOM object from serlvet to Clientside. Where in the client Side i am using Ajax.
Kindly advice me.

Re: how to request to servlet from Ajax
--------------------------------------------------------------------------------

Its Better to ask this question with the Coding that you made so far.
Because the coding might explain the situation rather than 1000 words that you've posted with your question. Thanks!

*************** *************** *************** *************** *************** *************** *************** *************** *************** *************** *************** *************** ****


Here is the Buss Logic Code from which i am getting DOM Object



package Mypackage;


import java.io.IOExcep tion;
import java.io.StringR eader;
import java.io.StringW riter;
import java.sql.Result Set;
import java.sql.Result SetMetaData;
import java.sql.SQLExc eption;
import javax.print.Doc ;

import javax.xml.parse rs.DocumentBuil der;
import javax.xml.parse rs.DocumentBuil derFactory;
import javax.xml.parse rs.FactoryConfi gurationError;
import javax.xml.parse rs.ParserConfig urationExceptio n;

import org.apache.xml. serialize.Outpu tFormat;
import org.apache.xml. serialize.XMLSe rializer;
import org.w3c.dom.Doc ument;
import org.w3c.dom.Ele ment;
import org.xml.sax.Inp utSource;
import org.xml.sax.SAX Exception;
import java.util.*;

public class RstoXml {

ArrayList al_conc = new ArrayList();
ResultSet rs = null;
public RstoXml() {
}
public static Document toDocument(Resu ltSet rs)throws ParserConfigura tionException, SQLException{

DocumentBuilder Factory factory = DocumentBuilder Factory.newInst ance();
DocumentBuilder builder = factory.newDocu mentBuilder();
Document doc = builder.newDocu ment();


Element root = doc.createEleme nt("Concept");
doc.appendChild (root);

ResultSetMetaDa ta rsmd = rs.getMetaData( );
int col_count = rsmd.getColumnC ount();

for(int i=0;i<col_count ;i++){
Element Selement = doc.createEleme nt("concept"+i) ;
Object obj = rs.getObject(1) ;
Selement.append Child(doc.creat eTextNode(obj.t oString()));
root.appendChil d(Selement);
}
return doc;
}

}


Here is the another Buss Logic from here i am passing the DOM object to servlet

import Mypackage.*;
import java.util.*;
import java.sql.*;
import javax.xml.parse rs.ParserConfig urationExceptio n;
import org.w3c.dom.Doc ument;
import org.w3c.dom.Ele ment;

public class QueryPopulate {

Connection con=null;
Statement stat=null;
ResultSet rs =null;
Document doc = null;
dbaseconnection dbase = new dbaseconnection ();
ArrayList conc_list = new ArrayList();
RstoXml xl;
/** Creates a new instance of QueryPopulate */
public QueryPopulate() {

}
public Document PopulateConcept (){
String qry = "select distinct ConceptName from Concept";
con = dbase.getconobj ();
try {
stat = con.createState ment();
rs = stat.executeQue ry(qry);
while(rs.next() ) {
conc_list.add(r s.getString(1)) ;
}
doc= RstoXml.toDocum ent(rs);
} catch (SQLException ex) {
ex.printStackTr ace();
}catch (ParserConfigur ationException pce) {
pce.printStackT race();
}
return doc;

}
}


Here is the servelet code from here I need to pass the DOM object to client side.

protected void processRequest( HttpServletRequ est request, HttpServletResp onse response)
throws ServletExceptio n, IOException {
response.setCon tentType("text/html;charset=UT F-8");
PrintWriter out = response.getWri ter();
System.out.prin tln("HaiHello") ;

request.getPara meterValues("sl t_concept");
doc = qp.PopulateConc ept();

[santhoskumara]

Re: how to request to servlet from Ajax

Post: how to request to servlet from Ajax
--------------------------------------------------------------------------------

How to request to servlet from Ajax and also I got the DOM object in the servlet through Business Logic. Now how will i pass the DOM object from serlvet to Clientside. Where in the client Side i am using Ajax.
Kindly advice me.

Re: how to request to servlet from Ajax
--------------------------------------------------------------------------------

Its Better to ask this question with the Coding that you made so far.
Because the coding might explain the situation rather than 1000 words that you've posted with your question. Thanks!

*************** *************** *************** ***** *************** *************** *************** ***** *************** *************** *************** ***** *************** *************** ****


Here is the Buss Logic Code from which i am getting DOM Object



package Mypackage;


import java.io.IOExcep tion;
import java.io.StringR eader;
import java.io.StringW riter;
import java.sql.Result Set;
import java.sql.Result SetMetaData;
import java.sql.SQLExc eption;
import javax.print.Doc ;

import javax.xml.parse rs.DocumentBuil der;
import javax.xml.parse rs.DocumentBuil derFactory;
import javax.xml.parse rs.FactoryConfi gurationError;
import javax.xml.parse rs.ParserConfig urationExceptio n;

import org.apache.xml. serialize.Outpu tFormat;
import org.apache.xml. serialize.XMLSe rializer;
import org.w3c.dom.Doc ument;
import org.w3c.dom.Ele ment;
import org.xml.sax.Inp utSource;
import org.xml.sax.SAX Exception;
import java.util.*;

public class RstoXml {

ArrayList al_conc = new ArrayList();
ResultSet rs = null;
public RstoXml() {
}
public static Document toDocument(Resu ltSet rs)throws ParserConfigura tionException, SQLException{

DocumentBuilder Factory factory = DocumentBuilder Factory.newInst ance();
DocumentBuilder builder = factory.newDocu mentBuilder();
Document doc = builder.newDocu ment();


Element root = doc.createEleme nt("Concept");
doc.appendChild (root);

ResultSetMetaDa ta rsmd = rs.getMetaData( );
int col_count = rsmd.getColumnC ount();

for(int i=0;i<col_count ;i++){
Element Selement = doc.createEleme nt("concept"+i) ;
Object obj = rs.getObject(1) ;
Selement.append Child(doc.creat eTextNode(obj.t oStri ng()));
root.appendChil d(Selement);
}
return doc;
}

}


Here is the another Buss Logic from here i am passing the DOM object to servlet

import Mypackage.*;
import java.util.*;
import java.sql.*;
import javax.xml.parse rs.ParserConfig urationExceptio n;
import org.w3c.dom.Doc ument;
import org.w3c.dom.Ele ment;

public class QueryPopulate {

Connection con=null;
Statement stat=null;
ResultSet rs =null;
Document doc = null;
dbaseconnection dbase = new dbaseconnection ();
ArrayList conc_list = new ArrayList();
RstoXml xl;
/** Creates a new instance of QueryPopulate */
public QueryPopulate() {

}
public Document PopulateConcept (){
String qry = "select distinct ConceptName from Concept";
con = dbase.getconobj ();
try {
stat = con.createState ment();
rs = stat.executeQue ry(qry);
while(rs.next() ) {
conc_list.add(r s.getString(1)) ;
}
doc= RstoXml.toDocum ent(rs);
} catch (SQLException ex) {
ex.printStackTr ace();
}catch (ParserConfigur ationException pce) {
pce.printStackT race();
}
return doc;

}
}


Here is the servelet code from here I need to pass the DOM object to client side.

protected void processRequest( HttpServletRequ est request, HttpServletResp onse response)
throws ServletExceptio n, IOException {
response.setCon tentType("text/html;charset=UT F-8");
PrintWriter out = response.getWri ter();
System.out.prin tln("HaiHello") ;

request.getPara meterValues("sl t_concept");
doc = qp.PopulateConc ept();

------------------------------*************** ******-------------------------------------------------------


Here is the Ajax part code:

<script>
function body_onload(){
createHttpReque st();

}
var request;
var url="/BudgetAmount/Mypackage/controllerservl et";
var bool=true;
var reqtype="Get";
var ref_val;

function createHttpReque st(){
if(window.XmlHt tpRequest){
request = new XMLHttpRequest( );
initRequest(req type,url,bool);
return false;
}
else if(window.Activ eXObject){
request = new ActiveXObject(" Msxml2.XMLHTTP" );

if(!request)
request = new ActiveXObject(" Microsoft.XMLHT TP");

if(request){
initRequest(req type,url,bool);
}else
alert("error on Page");

}
return false;
}
function initRequest(req type,url,bool){
request.onready statechange = handleResponse;
request.open(re qtype,url,bool) ;
request.send(nu ll);
return false;
}
function handleResponse( ){
if(request.read ystate==4 && request.status= =200){
parseMessage(re quest.responseX ML);
}
return false;
}
function parseMessage(do c){
var elements = doc.documentEle ment;
if(elements.has ChildNodes() && elements!=null) {
var concept_names = elements.childN odes;
for(var i=0;i<concept_n ames.length;i++ ){
document.all("s lt_concept").op tions[i+1].text=concept_n ames[i].nodevalue;
}
}
else

return false;
}
</script>

[praveen2gupta]

Its Better to ask this question with the Coding that you made so far.
Because the coding might explain the situation rather than 1000 words that you've posted with your question. Thanks!

Hi

I have ssen your coding. You have not applied Ajax till now. Steps that can help you with java/jsp use.

1. Ajax works with browser. So make a proper file prefers jsp. So that you can
Interact with browser.

2. Through Ajax you should call jsp page, This jsp page can interact with the java classes and servlets.

3. Direct applying ajax to the servlets , I think not possible.

[bartonc]

Sorry, guys. I moved this here without check the OP's history first.
My bad.

[acoder]

Merged threads.