Beans and jsp on JWS

hi guys i am trying to run a simple bean include in a jsp on javawebserver.i have created a jar file and put it into the lib directory of the JWS.on running the local host it give the error that the beanclass is not found.kindly help

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Hi frnds i want to help in servlet,java bean and JSP

hi friends i'm right now in M.SC(IT) and i want to do project in SERVLET,,JAVA BEANS and JSP ,
so pls give me a title about that
NOTE: I develop a project in group(2 persons there)
my email id is : [email protected] , [email protected] , [email protected]

You cannot pair your iPod to a cell phone, so forget about it.
The only way you can get free WiFi is to hang out at a Denny's, a Starbucks, or a truck stop, and I don't think your parents would approve....

Problem with java beans and jsp on web logic 6.0 sp1

          HI ,
          I am using weblogic6.0 sp1.
          i have problem with jsp and java beans.
          i am using very simple java bean which stores name and email
          from a html form.
          but i am getting following errors:
          Full compiler error(s):
          D:\bea4\wlserver6.0sp1\config\mydomain\applications\DefaultWebApp_myserver\WEB-INF\_tmp_war_myserver_myserver_DefaultWebApp_myserver\jsp_servlet\_savename2.java:89:
          cannot resolve symbol
          symbol : class userbn
          location: class jsp_servlet._savename2
          userbn ud = (userbn) //[ /SaveName2.jsp; Line: 7]
          ^
          D:\bea4\wlserver6.0sp1\config\mydomain\applications\DefaultWebApp_myserver\WEB-INF\_tmp_war_myserver_myserver_DefaultWebApp_myserver\jsp_servlet\_savename2.java:89:
          cannot resolve symbol
          symbol : class userbn
          location: class jsp_servlet._savename2
          userbn ud = (userbn) //[ /SaveName2.jsp; Line: 7]
          ^
          D:\bea4\wlserver6.0sp1\config\mydomain\applications\DefaultWebApp_myserver\WEB-INF\_tmp_war_myserver_myserver_DefaultWebApp_myserver\jsp_servlet\_savename2.java:94:
          cannot resolve symbol
          symbol : class userbn
          location: class jsp_servlet._savename2
          ud = (userbn) java.beans.Beans.instantiate(getClass().getClassLoader(),
          "userbn"); //[ /SaveName2.jsp; Line: 7]
          ^
          3 errors
          in which directory should i place java bean source file(.java file)
          here is my jsp file:
          <%@ page language = "java" contentType = "text/html" %>
          <html>
          <head>
          <title>bean2</title>
          </head>
          <body>
          <jsp:usebean id = "ud" class = "userbn" >
          <jsp:setProperty name = "ud" property = "*" />
          </jsp:usebean>
          <ul>
          <li> name: <jsp:getProperty name = "ud" property = "name" />
          <li> email : <jsp:getProperty name = "ud" property = "email" />
          </ul>
          </body>
          <html>
          here is my bean :
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          import java.io.*;
          public class userbn implements Serializable
               private String name ;
               private String email;
               public void setName(String n)
                    name = n;
               public void setEmail(String e)
                    email = e;
               public String getName()
                    return name;
               public String getEmail()
                    return email;
               public userbn(){}
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          pls help me.
          Thanks
          sravana.


          You realy can do it like Xiang says, but the better way is to use packages. That's
          the way BEA is designed for. If you use packages you can but your bean classes
          in every subfolder beneath Classes. Here for example we have the subfolders test
          and beans:
          You have to declare the package on top of your Bean Source Code:
          package test.beans;
          In your JSP you don't need the import code of Xiang. You only have to refer the
          path of your bean class:
          <jsp:useBean id="testBean" scope="session" class="test.beans.TestBean" />
          There are some other AppServers that only can deploy Java Beans in packages. So
          if you use packages you are always on the right side.
          ciao bernd
          "sravana" <[email protected]> wrote:
          >
          >Thank you very much Xiang Rao, It worked fine.
          >Thanks again
          >sravana.
          >
          >"Xiang Rao" <[email protected]> wrote:
          >>
          >><%@ page import="userbn" language = "java" contentType = "text/html"
          >>%> should
          >>work for you.
          >>
          >>
          >>"sravana" <[email protected]> wrote:
          >>>
          >>>HI ,
          >>>
          >>>I am using weblogic6.0 sp1.
          >>>
          >>>i have problem with jsp and java beans.
          >>>
          >>>i am using very simple java bean which stores name and email
          >>>
          >>>from a html form.
          >>>
          >>>but i am getting following errors:
          >>>
          >>>________________________________________________________________
          >>>
          >>>Full compiler error(s):
          >>>D:\bea4\wlserver6.0sp1\config\mydomain\applications\DefaultWebApp_myserver\WEB-INF\_tmp_war_myserver_myserver_DefaultWebApp_myserver\jsp_servlet\_savename2.java:89:
          >>>cannot resolve symbol
          >>>symbol : class userbn
          >>>location: class jsp_servlet._savename2
          >>> userbn ud = (userbn) //[ /SaveName2.jsp; Line: 7]
          >>> ^
          >>>D:\bea4\wlserver6.0sp1\config\mydomain\applications\DefaultWebApp_myserver\WEB-INF\_tmp_war_myserver_myserver_DefaultWebApp_myserver\jsp_servlet\_savename2.java:89:
          >>>cannot resolve symbol
          >>>symbol : class userbn
          >>>location: class jsp_servlet._savename2
          >>> userbn ud = (userbn) //[ /SaveName2.jsp; Line: 7]
          >>> ^
          >>>D:\bea4\wlserver6.0sp1\config\mydomain\applications\DefaultWebApp_myserver\WEB-INF\_tmp_war_myserver_myserver_DefaultWebApp_myserver\jsp_servlet\_savename2.java:94:
          >>>cannot resolve symbol
          >>>symbol : class userbn
          >>>location: class jsp_servlet._savename2
          >>> ud = (userbn) java.beans.Beans.instantiate(getClass().getClassLoader(),
          >>>"userbn"); //[ /SaveName2.jsp; Line: 7]
          >>> ^
          >>>3 errors
          >>>
          >>>____________________________________________________________
          >>>
          >>>in which directory should i place java bean source file(.java file)
          >>>
          >>>here is my jsp file:
          >>>--------------------------------------------------------
          >>>
          >>><%@ page language = "java" contentType = "text/html" %>
          >>><html>
          >>><head>
          >>><title>bean2</title>
          >>></head>
          >>><body>
          >>><jsp:usebean id = "ud" class = "userbn" >
          >>><jsp:setProperty name = "ud" property = "*" />
          >>></jsp:usebean>
          >>><ul>
          >>><li> name: <jsp:getProperty name = "ud" property = "name" />
          >>><li> email : <jsp:getProperty name = "ud" property = "email" />
          >>></ul>
          >>></body>
          >>><html>
          >>>
          >>>-------------------------------------------------------------
          >>>
          >>>here is my bean :
          >>>
          >>>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          >>>
          >>>import java.io.*;
          >>>
          >>>public class userbn implements Serializable
          >>>{
          >>>
          >>>     private String name ;
          >>>
          >>>     private String email;
          >>>
          >>>     public void setName(String n)
          >>>     {
          >>>
          >>>          name = n;
          >>>     }
          >>>
          >>>     public void setEmail(String e)
          >>>     {
          >>>
          >>>          email = e;
          >>>     }
          >>>
          >>>     public String getName()
          >>>     {
          >>>
          >>>          return name;
          >>>     }
          >>>
          >>>     public String getEmail()
          >>>     {
          >>>
          >>>          return email;
          >>>     }
          >>>
          >>>     public userbn(){}
          >>>}
          >>>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          >>>
          >>>pls help me.
          >>>Thanks
          >>>sravana.
          >>>
          >>
          >

Java Beans and JSP Arrays

Hi..
I am trying to pass a 2D String array to a Java Bean and i am getting
"java.lang.NoSuchMethodError"
Any Ideas?
Thanks
Joe
Jsp Call
Sorts s = new Sorts();
s.getTotal(items);
"items[][]" is a 2 dimentional arrays and size can vary..
Java Bean
public class Sorts implements Serializable {
public double getTotal(String sItems[][]){
double aSum=0;
for(int i=0;i<sItems[0].length;i++){
aSum=aSum+(Double.parseDouble(sItems[1])*Double.parseDouble(sItems[2][i]));
return aSum;

Can someone show me how to pass a 2 Dimentional Array to a Java Bean method? obviously i am doing something wrong.
Joe
Hi..
I am trying to pass a 2D String array to a Java Bean
and i am getting
"java.lang.NoSuchMethodError"
Any Ideas?
Thanks
Joe
Jsp Call
Sorts s = new Sorts();
s.getTotal(items);
"items[][]" is a 2 dimentional arrays and size can
vary..
Java Bean
public class Sorts implements Serializable {
public double getTotal(String sItems[][]){
double aSum=0;
for(int i=0;i<sItems[0].length;i++){
aSum=aSum+(Double.parseDouble(sItems[1])*Double.pars
Double(sItems[2][i]));
return aSum;

How can i use JAVA BEAN and JSP?

well, i have developed all my web apps by using pure JSP only, i know this sucks, but i dont know how to start on using beans... what directory should i put them into... etc... what are the good programminmg practices/standards/techniques when incorporating beans in jsp???

Standards are pretty loose, but generally, Beans hold a lot of the backend logic for your JSP. This can include data validation before entering into the database, database inserts, queries, data manipulation. The JSP should really only contain code that will retrieve the data from the bean and appropriately output it.
As far as using them, you can use the <jsp:useBean> tag in your JSP. As long as the bean is stored somewhere that your classpath points to, you're all set. From then on, you can use it like any other object in your JSP.

Java beans and JSP - Training

Hi
Does Sun or some other organization conduct any good workshops on Javabeans and jsp technology - hands on training like Microsoft products usually have. - Something like "devcon" ??
Some people from our workplace have to have some urgent training on these technologies. Thanks in advance.
Sue

They sure do... http://courses.coreservlets.com/
Don't really know how much or how often they offer these courses though.. looks like the guy might be free to do something soon. But to be honest, these courses basically run through the book. If your programmers have a decent background in Java, I'd say you could just as easily get away with getting some books (Profession JSP - Wrox press is amazing). I learned JSP in about 3 days of solid cramming.

Java.lang.NoSuchMethodError using beans and JSP

Hi,
I get a
java.lang.NoSuchMethodError: Unit.UnitBean.execSQL(Ljava/lang/String; Ljava/sql/ResultSet;
when i try to call that method from my jsp page. I can call all other methods in teh bean but I can't understand why it can't find execSQL when it finds every thing else.
Any help would be greatly appreciated.
Mike
Heres a copy of my java bean code:
package Unit;
import java.sql.*;
import java.io.*;
public class UnitBean
     Connection con;
     String error;
     public boolean connect() throws ClassNotFoundException,SQLException
          String StudentNumber = "xxx";
          String strHost = "xxxx";
          String strConnectURL = ("jdbc:postgresql://" + strHost + "/");
          String strUser = "xxxx";
          String strPassword = "xxxxx";
          Class.forName("org.postgresql.Driver");
          con = DriverManager.getConnection(strConnectURL, strUser, strPassword);
          return true;
     public void disconnect() throws SQLException
          con.close();
     public ResultSet execSQL(String sql)throws SQLException
          Statement s = con.createStatement();
          ResultSet rs = s.executeQuery(sql);
          return rs;
     public String test()
          String Mike="HIHIHIHIHI";
          return Mike;
}And the jsp code:
<%@ page language="java" contentType="text/html"%>
<%@ page import="java.sql.*" %>
<%@ page import="java.io.*" %>
<jsp:useBean id="Unit" class="Unit.UnitBean" scope="page"/>
<html>
     <head>
          <title>Test My Bean!!!!???!!?!</title>
     </head>
     <body>
          <%
               String SQL ="Select * from unit where unitid='CMPS2B26'";
               ResultSet rs =null;
               try
                    Unit.connect();
                    rs = Unit.execSQL(SQL);
                    while(rs.next())
                              out.println(rs.getString("unitid"));
                    Unit.disconnect();
               catch(Exception e)
                    out.println("<p>Problem with jsp code" +e);
          %>
          This is a jsp page.
          <p><a href = "http://stuweb3.cmp.uea.ac.uk/~xxxx/index.html">Click here for home page</a>
     </body>
</html>

Yeah, that worked great, thanks a lot. I thought that JSP compiled when you changed it and then visited it, but i've tried that. I just ran ant stop start on my server and it's all working.
Thanks again :)
Mike

Does calling class methods from bean and JSP cause collision?

Hi,
Please look at the class below:
public class X
// no member variable
public X() {}
// pay attention to static keyword
public static int getY()
Think a bean (say BeanZ) that make calls to getY() method without initializing the class X (like this: X.getY() )
And think many users having "page scope" in JSP make call to BeanZ or directly calls it from JSP.
I'm wondering if any collision occurs because of STATIC method? Should I use "SYNCHRONIZED" keyword with it? If so, what about Math.cos() which also is a non synchronized static method ? Shouldn't I use Math.cos() (and the other static methods) in JSP or bean?
Thank you for your help.
Ali Sadik

Hi,
Thank you for your quick answer. Think my class like this:
public class X
// no member variable
public X() {}
// pay attention to static keyword
public static int[] getY(int a, int[] b)
// i know there is no need for the extra array.
// just for example ;)
int[] ret = new int[b.length];
for(int i = 0; i < b.length; i++)
ret[i] = a * b;
return ret;
Does it the type of class that you've mentioned ? It makes calculation to produce dynamic result. Shouldn't I use it as static ? If your answer is yes, what about Math.cos()? Doesn't it have dynamic calculation?
Thanks a lot.

J2EE Java Beans and JSP

I need a little help. I would like to learn jsp programming. Ive been browsing lots of tutorials on net but i didnt find any way how to use your own classes in jsp. I suppose it could do something with Java Beans but im new them so i dont know. Lets say ive got a login form with a username and password. After i send it to another jsp lets say verify.jsp i would like to verify the user using a class ive got. It goes through a xml file with some accounts and looks for the desired user if the password is correct. Now how do i call a method: boolean verifyUser( String user, String password) in the verify.jsp file? Is it possible?
Thanks for help

you'll probably want to have a central servlet that all your JSPs will talk to and acts as a traffic cop to direct navigation between pages. it can be the one to add JavaBeans as attributes to page/request/session/application scope. Your JSP can then get the Bean as an atribute and call its isValid method.
Java Beans are NOT Enterprise Java Beans. Be sure you understand the difference. The former are Java objects that follow Bean conventions; the latter are Java objects that extend EJB types and run in a container. Very different.
%

Java beans and jsp's

Hi,
I created an ErrorBean for my html form. So when the user clicks submit the servlet checks for errors, if there are errors it creates the ErrorBean with the appropriate messages. Then i sendRedirect back the that HTML form. The errors do display on the form but I would like them only to last for that page.... so if the user decides to go away and come back , the error messages aren't still there. hopefully this is clear.
Any help would be great!
thanks
lex

You are obviously putting the bean into session scope which is necessary if you do a sendRedirect. If you were doing a forward instead of a redirect, you could put the error bean into request scope and then you wouldn't have this problem. If you must do a redirect, then you'll have to do more work. The jsp which displays the form should remove the bean from the session once it is done processing the page.

About java beans and jsps

hi,
can anybody tell me is it good use only jsp for presentation and business logic.
in terms of perfomence wise is it good practice.
regards,
sam

I think you had better to write in a beans.otherwise,the work of maintenance will be difficult.

Visible Beans and JSPs. URGENT

Can I use a visible bean on a JSP page? I mean, can I load the graphics part of a visible bean on an HTML page or something similar?
I need to know if I can do that, and if it's possible, how I can do it. This is very urgent.

I know I can load an applet and have a JSP communicate with it. My concern is that if I can load a graphical interface contained in a bean without using applets, on a JSP.
And please, if this is possible, provide a little sample.

Java Beans and Jsp

i'm using a bean to capture information from user input.
<jsp:usebean class= .... etc
i'm confused with regards to j2ee. where is the bean kept?
can i use JNDI to find the been? if so, how?
any tips or advice would be appreciated
owen

I suggest you start by reading the J2EE Tutorial at http://java.sun.com/j2ee/tutorial

The relation of Servlet , bean and jsp

servlet can output to IE directly? I mean that design a servlet adding some code in the service method, compile it, input URL: localhost:8080/test/servletname, can I get result? (Tomcat, register servlet in web.xml)

yes that's the point!
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class HelloWorld extends HttpServlet {
     public void doGet( HttpServletRequest req, HttpServletResponse resp )
     throws ServletException, IOException {
          resp.getWriter().println( "<html><body>Hello World</body></html>" );
}

Javabeans and JSP

I am new to Beans and JSP. I would like to know how I can 'get' the resultset and output to a JSP? It would have a few records and each record will have field1,field2 and field3.
My question again: How to continue from here in Beans? How to write the code in JSP? Can anyone guide me with some simple codes as I would not be able to understand advance codes.
Thanks.
public String Login(String inputDep) throws SQLException
          String returnString = null;
          String dbUserid = "sa"; // Your Database user id
          String dbPassword = "" ; // Your Database password
          try
               Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
               Connection con = DriverManager.getConnection("jdbc:odbc:test", dbUserid ,dbPassword);
               Statement stmt = con.createStatement();
               String sql= "select * from Product where dept = '"+inputDep+"'";
               ResultSet rs = stmt.executeQuery(sql);

You could also try to read the resultset in your bean.
like:
=========== Bean ===============
public class myClass
public AccountData Login(String name, String password)
AccountData data = new AccountData ();
data.setName (resultset.getString ("name"));
//other setter methods
return data;
// use inner class to store values
public class AccountData
    AccountData ()
    private String name = null;
    //further attributes
    pubilic String getName ()
        return name;
    void setName (String name)
        this.name = name;
    //further getter and setter
}=========== JSP ===============
<jsp:useBean id="myBean" scope="session" class="classes.BeanClass"/>
<% MyClass.AccountData data = myBean.Login (name, password); %>
Name : <%= data.getName () %>Note > means %>

Beans and jsp on JWS

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