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Servlet Program

Former Member

on ‎05-17-2006 10:33 AM

0 Kudos

Hi,

I want to retrieve the values like vendor number, name, city and PO Box from lfa1 table for that i created a rfc.

I created a html and servlet but when i entered the vendor number into it. No values are displayed.

If I provide the vendor number in the servlet program details are displayed, but when iam provide the vendor number through the html page the servlet is not taking the values.

Iam using Netweaver developer studio proxy's are generated properly for RFC.

Here is my code HTML and Servlet code:

<html>

<head>

<title> Vendor Details</title>

<script language="JavaScript">

function getVendorDetails()

{

document.location = "http://localhost:8880/contextRoot/Servlet";

}

</script>

</head>

<body bgcolor="#eeeff8">

<center>

<hr>

<h1>Enter the Vendor Number</h1>

<hr>

</center>

<form name=form1 action="" method=post>

<center>

<input type="text" name="vendno">

<input type="button" value="Login" onclick = "getVendorDetails()">

</center>

</form>

</body>

</html>

</HEAD>

<BODY BGCOLOR="#FFFFFF">

</BODY>

</HTML>

Servlet Code :

package myPackage;

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import myPackage.util.ZbapistructureType_List;

//import com.sap.aii.proxy.framework.core.SystemFaultException;

import com.sap.mw.jco.JCO;

public class VendorServlet extends HttpServlet {

protected void doPost(

HttpServletRequest request,

HttpServletResponse response)

throws ServletException,IOException {

PrintWriter out = response.getWriter();

String vendno = request.getParameter("vendno");

try

{

JCO.Client jcoClient =

JCO.createClient(

"200",

"pavan",

"pavan",

"en",

"dev",

"00");

jcoClient.connect();

Zbapivendor_Input input = new Zbapivendor_Input();

//input.setVendorno("0000020005");

//input.getVendorno();

input.setVendorno("vendno");

VendorPort_PortType port = new VendorPort_PortType();

port.messageSpecifier.setJcoClient(jcoClient);

Zbapivendor_Output output = port.zbapivendor(input);

ZbapistructureType_List vendorList = output.get_as_listItab();

int listsize = vendorList.size();

for (int i = 0; i < listsize; i++)

{

ZbapistructureType elem = vendorList.getZbapistructureType(i);

//out.println("<html><body>");

out.println(elem.getVendor_No()); //+ '\t'

//+ elem.getName());

//out.println("</body></html>");

}

}

catch(Exception e)

{

e.printStackTrace();

}

}

protected void doGet(

HttpServletRequest request,

HttpServletResponse response)

throws ServletException, IOException {

PrintWriter out = response.getWriter();

// String vendno = request.getParameter("vendno");

try

{

JCO.Client jcoClient =

JCO.createClient(

"200",

"abap",

"abap",

"en",

"sapdev",

"00");

jcoClient.connect();

Zbapivendor_Input input = new Zbapivendor_Input();

input.setVendorno("0000020005");

//input.setVendorno("vendno");

//input.setVendorno("vendorno");

VendorPort_PortType port = new VendorPort_PortType();

port.messageSpecifier.setJcoClient(jcoClient);

Zbapivendor_Output output = port.zbapivendor(input);

ZbapistructureType_List vendorList = output.get_as_listItab();

int listsize = vendorList.size();

for (int i = 0; i < listsize; i++)

{

ZbapistructureType elem = vendorList.getZbapistructureType(i);

//out.println("<html><body>");

out.println(elem.getVendor_No());

out.println(elem.getName());

out.println(elem.getCity());// + '\t'

//+ elem.getName());

//out.println("</body></html>");

}

}

catch(Exception e)

{

e.printStackTrace();

}

}

}

Please help me out.

Thanks,

Pavan.

Message was edited by: Pavan Panduru

Message was edited by: Pavan Panduru

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Answers (1)

Answers (1)

Former Member
‎05-17-2006 11:12 AM
0 Kudos

Any specific reason you are using

document.location = "http://localhost:8880/contextRoot/Servlet";

??

instead specify

http://localhost:8880/contextRoot/Servlet

as the form action and on click of submit button let the form post the request parameter <b>vendno</b>

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Former Member
‎05-17-2006 11:36 AM
0 Kudos

Hi Amol,

I changed the html page as below:

<html>

<head>

<title> Vendor Details</title>

<script language="JavaScript">

</script>

</head>

<body bgcolor="#eeeff8">

<center>

<hr>

<h1>Enter the Vendor Number</h1>

<hr>

</center>

<form name=form1 action="http://localhost:8880/contextRoot/Servlet" method="post">

<center>

<input type="text" name="vendno">

<input type="submit" value="submit">

</center>

</form>

</body>

</html>

Now when I click on the submit button it is going to the servlet but no data is displayed.

Is there any problem with the servlet or html?

Please let me know.

Thanks,

Pavan.

Message was edited by: Pavan Panduru

former_member185706
Participant
‎05-17-2006 12:16 PM
0 Kudos

Hi Pavan,

i saw that you have wrapped all your code in try-catch block. If there is an error you can't see it in the browser, vecause you don't write it in the response writer object, but just dump stacktrace in the err stream. You can have a look at the default trace file, or (it would be better) dump this trace in the writer. Here is an example, to put in the catch clause :


java.io.StringWriter temp = new java.io.StringWriter();
     PrintWriter ptemp = new PrintWriter(temp);
     e.printStackTrace(ptemp);
     out.print("<pre><code>" + temp.getBuffer() + "</code></pre>");

I hope this should help to see the real problem.

Regards

Bojidar

Former Member
‎05-17-2006 12:28 PM
0 Kudos

Hi,

I added the code in the servlet catch block, but there is no output is printing.

Please let me know where actual problem is there.

Thanks,

Pavan.

former_member185706
Participant
‎05-17-2006 12:33 PM
0 Kudos

Do you mean that there is no any response or there is an error response like 404 NotFound ...?

How is the servlet declared in web.xml?

You can add out.close() at the end of doPost method, in order to flush all written content to the client.

Former Member
‎05-17-2006 12:47 PM
0 Kudos

Hi,

There is no error like 404Not Found, only blank page is displayed with no contents.

I changed the my program like below:

package myPackage;

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import myPackage.util.ZbapistructureType_List;

//import com.sap.aii.proxy.framework.core.SystemFaultException;

import com.sap.mw.jco.JCO;

public class VendorServlet extends HttpServlet {

protected void doPost(

HttpServletRequest request,

HttpServletResponse response)

throws ServletException, IOException {

PrintWriter out = response.getWriter();

String vendno = request.getParameter("vendno");

try {

JCO.Client jcoClient =

JCO.createClient("200", "pavan", "pavan", "en", "dev", "00");

jcoClient.connect();

Zbapivendor_Input input = new Zbapivendor_Input();

//input.setVendorno("0000020005");

//input.getVendorno();

input.setVendorno("vendno");

VendorPort_PortType port = new VendorPort_PortType();

port.messageSpecifier.setJcoClient(jcoClient);

Zbapivendor_Output output = port.zbapivendor(input);

ZbapistructureType_List vendorList = output.get_as_listItab();

int listsize = vendorList.size();

for (int i = 0; i < listsize; i++) {

ZbapistructureType elem = vendorList.getZbapistructureType(i);

//out.println("<html><body>");

out.println(elem.getVendor_No()); //+ '\t'

//+ elem.getName());

//out.println("</body></html>");

}

out.close();

} catch (Exception e) {

java.io.StringWriter temp = new java.io.StringWriter();

PrintWriter ptemp = new PrintWriter(temp);

e.printStackTrace(ptemp);

out.print("<PRE>" + temp.getBuffer() + "</PRE>");

}

}

protected void doGet(

HttpServletRequest request,

HttpServletResponse response)

throws ServletException, IOException {

PrintWriter out = response.getWriter();

String vendno = request.getParameter("vendno");

try {

JCO.Client jcoClient =

JCO.createClient("200", "pavan", "pavan", "en", "dev", "00");

jcoClient.connect();

Zbapivendor_Input input = new Zbapivendor_Input();

//input.setVendorno("0000020005");

input.setVendorno("vendno");

//input.setVendorno("vendorno");

VendorPort_PortType port = new VendorPort_PortType();

port.messageSpecifier.setJcoClient(jcoClient);

Zbapivendor_Output output = port.zbapivendor(input);

ZbapistructureType_List vendorList = output.get_as_listItab();

int listsize = vendorList.size();

for (int i = 0; i < listsize; i++) {

ZbapistructureType elem = vendorList.getZbapistructureType(i);

//out.println("<html><body>");

out.println(elem.getVendor_No());

out.println(elem.getName());

out.println(elem.getCity()); // + '\t'

//+ elem.getName());

//out.println("</body></html>");

}

} catch (Exception e) {

e.printStackTrace();

}

}

}

Please help me out.

Thanks,

Pavan.

former_member185706
Participant
‎05-17-2006 12:59 PM
0 Kudos

it seems that "listsize" is 0, that's why there is no iterration passed.

Could you put 


out.println("listsize="+listsize);

before out.close().

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