Expose EJB through Java Bean model importer in Web Dynpro

Hi,
I am planning to expose EJB like following:
1. Create Stateless session bean as a façade for DAO access.
2. Create DAO to access database. In my case is Oracle DB
3. Create Java Bean to encapsulate session bean
4. Import java bean model to web dynpro
Few of my business method return the object array e.g. Customer[] which contains all properties of customer, and getter, setter.
Has anyone done this before? Is there any sample code?
Best Regards,
Zhang Yan

Hi
I think u can refer to the following link
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/webas/java/simple java bean generator for database.pdf
Thought this link is also Useful
Creating and Deploying Web Services for an EJB
Wishes
Krishna kanth

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Hi,
Refers the following docs..
EJBs in Web Dynpro Application Using Wrapper Class
Here Java Bean Model used in web dynpro.
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/00be903b-8551-2b10-c28a-8520400c6451
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/1f5f3366-0401-0010-d6b0-e85a49e93a5c
Accessing database table using EJB and web dynpro
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/70929198-0d36-2b10-04b8-84d90fa3df9c
Oracle Connectivity with EJB using WebDynpro Application
https://www.sdn.sap.com/irj/sdn/wiki?path=/display/wdjava/oracle%2bconnectivity%2bwith%2bejb%2busing%2bwebdynpro%2bapplication
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Importing Java Bean Model in Webdynpro Development Component

Hi All,
Is there any simple tutorial, example to import java bean model in webdynpro development component.
I am using NWDS 7.0 SP14 and WAS 7.0.
it really helps if you can provide simple EJB as a development component with details how to create a public part and using this bean as java bean model in Webdynpro development component.
what are the steps to be followed with precautions
Thanks in Advance,
Murali

Hi,
[Using the Java Bean Model in Web Dynpro|https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/4072c0d0-c21e-2b10-ab84-e2c183d355de]
[Using EJBs in Web Dynpro|https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/1f5f3366-0401-0010-d6b0-e85a49e93a5c]
you will get more if you search in the forum.
more help on EJB's
Re: Help needed in EJB
http://help.sap.com/saphelp_nw70/helpdata/EN/19/f9bc3d8af79633e10000000a11405a/frameset.htm
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/70929198-0d36-2b10-04b8-84d90fa3df9c
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/1f5f3366-0401-0010-d6b0-e85a49e93a5c
PradeeP

Import Java Bean model in Web dynpro DC

Hi all,
I have created the following DC's on a track:
1. EMPDic (Type: Dictionary) - DC that contains the database table.
2. EMPEjb (Type J2EE) - DC that contains the EJBs that have business logic. Created a public part EMPpp that containd the bean classes.
3. EMPEar (Type J2EE) - DC that contains the EMPEjb module.In Used Dcs added EMPpp
4. EMPCmd (Type: Java) - DC that acts as the command bean.
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5. EMPWd (Type: Webdynpro) - DC that will contain the Java Bean Model and the application. In Used DCs added 'compile' and 'deploy'.
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If i select the radio button "project(source folder)" and click Next it says 'No JavaBeans for import'. Am i missing something?
Q2) Could someone tell me the exact steps from pt. 4 onwards. ie. whether it is necessary to create the 2 public parts for EMPCmd DC and what should it contain.
Thanking you in advance.

Hi Melwyn,
check the NWDI tutorial, it will help you:
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/c0b53558-6df6-2910-cfbf-a63316bb0fad
kind regards
Stefanie

Importing java Bean Model

hai ,
am new to webdynpro for java ... Am trying to import ejb bean jar to web dynpro ..
Steps as follows
i) copy the bean jar to wd project lib folder
ii) Set classpath
SampleWD - > Model
Model -> create model
Model name : Samplemodel
Model package : com.sample
Local jar file : C:\sap\workspace\SampleWD\lib\addbean.jar -- getting error in this step as Invalid Class - java bean not available for import
can anybody help me ..
Thanks in advance...
regards,
Krish

Hi Krish,
In addition to Madhu's suggestion,
As per the Java Bean Model creation steps, you will need to add the Commanad Bean JAR too in your Project, and while creation of Model, you need to select this Command Bean JAR and not the Bean Project JAR.
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I'm trying to import a CommandBean as a Java Bean Model in WebDynpro but I'm prompted with an error indicating that I cannot import the EJB (Session Bean) DC that is being accessed by my CommandBean - hence failing to import the CommandBean DC as well.
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Help please.
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Jan

HI,
just add ejb20.jar as an external jar in your WD project.

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Diffrence b/w Deploy Time & Design time in Java bean model

Hi all,
I have craeted a model using java bean.
create model->import java bean model->Add JAR->browse the jar.
There i have got two Radio Buttons
Design Time
Deploy Time
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Thanks & Regards,
Lokesh.

HI Lokesh,
The basic difference between design time and deploy time is. design time jars are only used when building your aplication and considered to be present already on server. and at runtime application refer to it..
while if you keep deploy time, then the application itself keeps that jar file with him and at runtime it refers to it.
i.e. application deploy that jar file on server.
When you run an application, application need all its dependencied to be present in webdynpro container of server.
your javabean model needs those jar files at server. so when you chose deploy time. it personly deploy that file on server.
Iif you keep it as design time then. then you will be able to build it.
but if those jar files are not present at the server then your application will not get deployed.
e.g.
let A & B are your two applications and they need xx.jar file of a EJB which is created by you to create a javabean model.
now as this xx.jar file is not present at server.
1. when you create model for A. Keep it as deploy time.
as application A deploy that xx.jar file on server. B can refer it directly
2._when you create model for B keep it as design time._

Need Help-How Store the input parameter through java bean

Hello Sir,
I have a simple Issue but It is not resolve by me i.e input parameter
are not store in Ms-Access.
I store the input parameter through Standard Action <jsp:useBean>.
jsp:useBean call a property IssueData. this property exist in
SimpleBean which create a connection from DB and insert the data.
At run time servlet and server also show that loggging are saved in DB.
But when I open the table in Access. Its empty.
Ms-Access have two fields- User, Password both are text type.
Please review these code:
login.html:
<html>
<head>
<title>A simple JSP application</title>
<head>
<body>
<form method="get" action="tmp" >
Name: <input type="text" name="user">
Password: <input type="password" name="pass">
<input type="Submit" value="Submit">
</form>
</body>
</html>LoginServlet.java:
import javax.servlet.*;
import javax.servlet.http.*;
public class LoginServlet extends HttpServlet{
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException{
try
String user=request.getParameter("user");
String pass=request.getParameter("pass");
co.SimpleBean st = new co.SimpleBean();
st.setUserName(user);
st.setPassword(pass);
request.setAttribute("user",st);
request.setAttribute("pass",st);
RequestDispatcher dispatcher1 =request.getRequestDispatcher("submit.jsp");
dispatcher1.forward(request,response);
catch(Exception e)
e.printStackTrace();
}SimpleBean.java:
package co;
import java.util.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;
import java.util.*;
public class SimpleBean {
private String user="";
private String pass="";
private String s="";
public String getUserName() {
return user;
public void setUserName(String user) {
this.user = user;
public String getPassword() {
return pass;
public void setPassword(String pass) {
this.pass = pass;
public String getIssueData() //method that create connection with database
try
System.out.println("Printed*************************************************************");
getUserName();
getPassword();
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
System.out.println("Loading....");
Connection con=DriverManager.getConnection("jdbc:odbc:simple");
System.out.println("Connected....");
PreparedStatement st=con.prepareStatement("insert into Table1 values(?,?)");
System.out.println("~~~~~~~~~~~~~~~~~~~~");
String User=getUserName();
st.setString(1,User);
String Password=getPassword();
st.setString(2,Password);
st.executeUpdate();
System.out.println("Query Executed");
con.close();
s= "Your logging is saved in DB ";
System.out.println("Your logging is saved in DB *****************");
return(s);
catch(Exception e)
e.printStackTrace();
return "failed";
}submit.jsp:
This is Submit page
<html><body>
Hello
Student Name: <%= ((co.SimpleBean)request.getAttribute("user")).getUserName() %>
<br>
Password: <%= ((co.SimpleBean)request.getAttribute("pass")).getPassword() %>
<br>
<jsp:useBean id="st" class="co.SimpleBean" scope="request" />
<jsp:getProperty name="st" property="IssueData" />
</body></html>web.xml:<web-app>
<servlet>
<servlet-name>one</servlet-name>
<servlet-class>LoginServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>one</servlet-name>
<url-pattern>/tmp</url-pattern>
</servlet-mapping>
<jsp-file>issue.jsp</jsp-file>
<jsp-file>submit.jsp</jsp-file>
<url-pattern>*.do</url-pattern>
<welcome-file-list>
<welcome-file>Login.html</welcome-file>
</welcome-file-list>
</web-app>Please Help me..Thanks.!!!
--

Dear Sir,
Same issue is still persist. Input parameter are not store in database.
After follow your suggestion when I run this program browser show that:i.e
This is Submit page Hello Student Name: vijay
Password: kumar
<jsp:setProperty name="st" property="userName" value="userValue/> Your logging is saved in DB
Please review my code.
login.html:
{code}<html>
<head>
<title>A simple JSP application</title>
<head>
<body>
<form method="get" action="tmp" >
Name: <input type="text" name="user">
Password: <input type="password" name="pass">
<input type="Submit" value="Submit">
</form>
</body>
</html>{code}
LoginServlet.java:
{code}import javax.servlet.*;
import javax.servlet.http.*;
public class LoginServlet extends HttpServlet{
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException{
try
String userValue=request.getParameter("user");
String passValue=request.getParameter("pass");
co.SimpleBean st = new co.SimpleBean();
st.setuserName(userValue);
st.setpassword(passValue);
request.setAttribute("userValue",st);
request.setAttribute("passValue",st);
RequestDispatcher dispatcher1 =request.getRequestDispatcher("submit.jsp");
dispatcher1.forward(request,response);
catch(Exception e)
e.printStackTrace();
}{code}
SimpleBean.java:
{code}package co;
import java.util.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;
import java.util.*;
public class SimpleBean {
private String userValue="";
private String passValue="";
private String s="";
public String getuserName() {
return userValue;
public void setuserName(String userValue) {
this.userValue = userValue;
public String getpassword() {
return passValue;
public void setpassword(String passValue) {
this.passValue= passValue ;
public String getissueData() //method that create connection with database
try
System.out.println("Printed*************************************************************");
getuserName();
getpassword();
Class.forName("oracle.jdbc.driver.OracleDriver");
System.out.println("Connection loaded");
Connection con=DriverManager.getConnection("jdbc:oracle:thin:@VijayKumar-PC:1521:XE","SYSTEM","SYSTEM");
System.out.println("Connection created");
PreparedStatement st=con.prepareStatement("insert into vij values(?,?)");
System.out.println("~~~~~~~~~~~~~~~~~~~~");
String userName=getuserName();
st.setString(1,userName);
String password=getpassword();
st.setString(2,password);
st.executeUpdate();
System.out.println("Query Executed");
con.close();
s= "Your logging is saved in DB ";
System.out.println("Your logging is saved in DB *****************");
return(s);
catch(Exception e)
e.printStackTrace();
return "failed";
}{code}
submit.jsp:
{code}This is Submit page
<html><body>
Hello
Student Name: <%= ((co.SimpleBean)request.getAttribute("userValue")).getuserName() %>
<br>
Password: <%= ((co.SimpleBean)request.getAttribute("passValue")).getpassword() %>
<br>
<jsp:useBean id="st" class="co.SimpleBean" scope="request" />
<jsp:setProperty name="st" property="userName" value="userValue/>
<jsp:setProperty name="st" property="password" value="passValue"/>
<jsp:getProperty name="st" property="issueData" />
</body></html>web.xml:<web-app>
<servlet>
<servlet-name>one</servlet-name>
<servlet-class>LoginServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>one</servlet-name>
<url-pattern>/tmp</url-pattern>
</servlet-mapping>
<jsp-file>submit.jsp</jsp-file>
<url-pattern>*.do</url-pattern>
<welcome-file-list>
<welcome-file>Login.html</welcome-file>
</welcome-file-list>
</web-app>Sir I can't use EL code in jsp because I use weblogic 8.1 Application Server.This version are not supported to EL.
Please help me...How store th input parameter in Database through Java Bean

Request parameter are not stored in database through Java Bean

Hi,
I want to store the request parameter in database through Java Bean.Allthough program are properly run but value are not store in DB.
Here My code:
Login.html:<html>
<head>
<title>A simple JSP application</title>
<head>
<body>
<form method="get" action="submit.jsp" >
Name: <input type="text" name="User">
Password: <input type="password" name="Pass">
<input type="Submit" value="Submit">
</form>
</body>
</html>SimpleBean.java:
package co;
import java.util.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;
import java.util.*;
public class SimpleBean implements java.io.Serializable{
private String User="";
private String Pass="";
public SimpleBean(){}
public String getUser() {
return User;
public void setUser(String User) {
this.User = User;
public String getPass() {
return Pass;
public void setPass(String Pass) {
this.Pass = Pass;
public void show()
try
System.out.println("Printed*************************************************************");
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
System.out.println("Loading....");
Connection con=DriverManager.getConnection("jdbc:odbc:Ex11dump");
System.out.println("Connected....");
PreparedStatement st=con.prepareStatement("insert into Table1 values(?,?)");
System.out.println("~~~~~~~~~~~~~~~~~~~~");
String User=getUser();
st.setString(1,User);
String Pass=getPass();
st.setString(2,Pass);
int y= st.executeUpdate();
System.out.println(y);
System.out.println("Query Executed");
con.commit();
con.close();
System.out.println("Your logging is saved in DB *****************");
catch(Exception e)
e.printStackTrace();
}submit.jsp:
<jsp:useBean id="obj" class="co.SimpleBean"/>
<jsp:setProperty name="obj" property="*" />
<jsp:getProperty name="obj" property="User" /> <br>
<jsp:getProperty name="obj" property="Pass" /> <br>
<% obj.show();%>
<%
out.println("Ur data is saved in DB");
%>Please Help me.
Thanks.

The issue is in the naming of your fields.
Change User -> user and Pass->pass
Name: <input type="text" name="user">
Password: <input type="password" name="pass">

Complex Java Bean Model in WD

I've revised the question.. to make it more simple.
I have 2 wrapper classes, the first wrapper HAS the second wrapper as an object.
When importing the Java Bean Model in WebDynpro, it seems okay - did the context binding, etc. -- until I did an "Apply Template" (as form) on the layout based on the CommandBean (which has the wrapper class).
Now, the fields are not active fields.. I can't change the cardinality -- and I have played around with the relations of the model classes with each other.
Nothing seems to work
Please help.
Edited by: Jan Michael Jaudian on Oct 8, 2008 8:07 AM

problem solved.
forgot to completely bind inner nodes.
developers who need more info, do post here so I can help out in any way I can.
Cheers!

How can I include Java Bean model into the model outside the component

Hi All,
I am new to SAP portal. I wanted to create a bean for storing the data and to include that into the application model.
Please help me with an example .
Regards,
Saroj

Hi,
Check these blogs.
The specified item was not found.
Importing Complex JavaBean model into WebDynpro by creating relationships for the model classes
JavaBean Model Import: when it really works
Issue in Importing Java Bean Model
Regards,
Harini S
Consider rewarding points for helpful answers. Post this thread in WD forums for more results.

Simple Java Bean Model in Wed Dynpro

Hello All,
I have to develop a WD Java application with an Oracle DB as the backend. To application was designed to abstract the backend interaction into a Java bean model. The data connection and retrieval was successful. To move the data to the context following steps were performed:
1. Create a java class with the variables to be used as context in the application. Ex: Name, Subject, Email
2. On interting the ResultSet, set the values to the variables.
But, only the last row of data is retained. We tried to use array but have not been able to move the ste of values to the context.
Request your help in this regard to store the set of values into the context.
Thank you.

Hi,
It looks like you are overwriting the same context element when populating it with the values from the resultset.
Make sure you create every time a new context element and add it to the context root.
while (rs.hasNext()) {
    ContextElement elem = new ContextElement(); // or something simular appropiate to your element
    elem.setName(rs.next().getName());
    contextRootNode.addElement(elem);
Hope this helps a little.
Regards,
Alain

Difference Betn EJB and Java Bean

what is diference between EJB and Java Bean...???

Is it really necessary to ask the same thing twice??
MeTitus

How to add a javabean Model to a web dynpro Project

Hi all,
I have been following the tutorial "Using EJBs in Web Dynpro Applications" for creating a customized LOCAL webdynpro application, based in javabean Model. It was made by just exporting the JAR file from a java project, as it is explained in the tutorial. OK.
The problem comes when I want to duplicate the development but using a DC Web Dynpro Project. I have re-develop every step of the tutorial but using DC projects:
DC diccionary project, DC ejb project, DC enterprise application project & DC java project.
But now I DO NOT KNOW the steps for importing the development into a model for DC Web Dynpro.
Anyhelp will be very appreciated, thanks in advance-

Thanks Jhansi,
Yes, you are right. I had already followed those steps. The error comes when I have to select between the JavaBean Source:
1. project (source folder) (checkbox)
2. public parts of used DC's (combobox)
I have been trying both, the second one by copying first the JAR called CommandBean.jar of my DC Java Project with dependencies to EJB project into the web dynpro "lib" folder, and then selecting the new entry CommandBean.jar from that combobox.
then i get de following error: "Invalid JAR - No JavaBeans available for import"
So I do not know how to use any of these two options for java source.
Thanks.

Expose EJB through Java Bean model importer in Web Dynpro

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